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Archive for the ‘seismic activity report’ Category

Strong Earthquake Strikes Offshore Guatemala

Posted by feww on January 19, 2010

Quake Measuring Up to Magnitude 6.1 Strikes Offshore Guatemala

Strong earthquake measuring as large as 6.1Mw struck south of Guatemala about 85 km (55 miles) WSW of Santa Ana, El Salvador and 105 km (65 miles) SSE of GUATEMALA CITY, Guatemala, at a depth of  about 50km on January 18, 2010 at 15:40 UTC.

This quake may (have) cause (caused) landslides in the mountainous regions of both El Salvador and Guatemala, which have not yet been detected (reported).

Tsunami Report

The quake was not large enough, and struck deep, to create a tsunami.

Location Reports:

The earthquake shook the buildings in El Salvador capital city of  San Salvador  causing panic among the residents, but did not cause any damage, according to Latin Press.

“We felt a tremor that was a bit strong. We are monitoring the area but there is no damage here. It was a light movement that lasted for a few seconds,” said a tourism official from the Guatemalan tourist office in Puerto Quetzal, on the country’s south coast, according to Reuters.

10-degree Map Centered at 15°N,90°W


Earthquake location Map. Source: USGS/EHP. Enhanced by FEWW

Earthquake Details:

  • Magnitude: 5.8 [FEWW Estimate: As large as 6.1Mw ]
  • Date-Time:
    • Monday, January 18, 2010 at 15:40:27 UTC
    • Monday, January 18, 2010 at 09:40:27 AM at epicenter
  • Location: 13.696°N, 90.333°W
  • Depth: 54.8 km (34.1 miles)
  • Region: OFFSHORE GUATEMALA
  • Distances:
    • 85 km (55 miles) WSW of Santa Ana, El Salvador
    • 105 km (65 miles) SSE of GUATEMALA CITY, Guatemala
    • 115 km (75 miles) W of SAN SALVADOR, El Salvador
    • 1140 km (710 miles) ESE of MEXICO CITY, D.F., Mexico
  • Location Uncertainty: horizontal +/- 6.3 km (3.9 miles)
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2010rqb3

Seismic Hazard Map


Click image to enlarge. Source: USGS/EHP. Enhanced by FEWW

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Powerful EQ Strikes E of Bristol I., SSI

Posted by feww on January 5, 2010

Powerful quake measuring up to M 7.0 strikes E of Bristol Island, South Sandwich Islands

The quake struck at 58.101°S, 14.867°W, about 685 km east of Bristol Island, South Sandwich Islands, at a depth of 10km on Tuesday, January 05, 2010 at 04:56 UTC

Tsunami Evaluation:

NO threat of a destructive widespread tsunami, NOAA/NWS/West Coast and Alaska Tsunami Warning Center said.

  • Earthquake Details:
  • Magnitude:  6.7  [Maximum EQ magnitude estimated at 7.5 Mw by FireEarth]
  • Date-Time
    • Tuesday, January 05, 2010 at 04:55:39 UTC
    • Tuesday, January 05, 2010 at 03:55:39 AM at epicenter
  • Location: 58.101°S, 14.867°W
  • Depth: 10 km (6.2 miles)
  • Region: EAST OF THE SOUTH SANDWICH ISLANDS
  • Distances:
    • 685 km (425 miles) E of Bristol Island, South Sandwich Islands
    • 3660 km (2270 miles) SSW of Cape Town, South Africa
  • Location Uncertainty: horizontal +/- 10.3 km (6.4 miles)
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2010rcat

10-degree Map Centered at 60°S,10°W


Earthquake location Map. Source: USGS/EHP. Enhanced by FEWW
.

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Powerful Quake Strikes Queen Charlotte Islands Region

Posted by feww on November 18, 2009

Earthquake Measuring up to 6.8 Mw followed by a Strong Aftershock Strikes Queen Charlotte Islands Region

A powerful earthquake measuring up to magnitude 6.8 followed by a cluster of aftershocks, the largest of which measured up to M 6.0, struck Queen Charlotte Islands Region on Tuesday, November 17, 2009 at about 15:31 UTC, at a shallow depth of about 5 km.

Tsunami Information

The West Coast/Alaska Tsunami Warning Center in Palmer AK, said there was no threat of a damaging tsunami caused by the earthquake. However some neighboring regions could experience non-damaging sea level changes. “In coastal areas of intense shaking locally generated tsunamis can be triggered by underwater landslides.”


Earthquake location Map. Source: USGS/EHP. Enhanced by FEWW

Earthquake Details:

  • Magnitude: 6.6 [Maximum quake magnitude estimated by FEWW at 6.8 Mw]
  • Date-Time:
    • Tuesday, November 17, 2009 at 15:30:46 UTC
    • Tuesday, November 17, 2009 at 07:30:46 AM at epicenter
  • Location: 52.151°N, 131.378°W
  • Depth: 11.6 km (7.2 miles)
  • Region: QUEEN CHARLOTTE ISLANDS REGION
  • Distances:
    • 250 km (155 miles) SSW (197°) from Prince Rupert, BC, Canada
    • 315 km (195 miles) WNW (303°) from Port Hardy, BC, Canada
    • 331 km (206 miles) S (178°) from Metlakatla, AK
    • 662 km (411 miles) WNW (302°) from Vancouver, British Columbia, Canada
  • Location Uncertainty: horizontal +/- 5.5 km (3.4 miles); depth +/- 10.5 km (6.5 miles)
  • Source: USGS NEIC (WDCS-D)
  • Event ID:  us2009pcaq

Historic Seismicity. USGS/EHP. Enhanced by FEWW

The Largest Earthquake in Canada

Canada’s largest earthquake (magnitude 8.1) since 1700, occurred on August 22, 1949 off the coast of BC. It occurred on the Queen Charlotte Fault (Canada’s equivalent of the San Andreas Fault) – the boundary between the Pacific and North American plates that runs underwater along the west coast of the Queen Charlotte Islands off the west coast of British Columbia. The shaking was so severe on the Queen Charlotte Islands that cows were knocked off their feet, and a geologist with the Geological Survey of Canada working on the north end of Graham Island could not stand up. Chimneys toppled, and an oil tank at Cumshewa Inlet collapsed. In Terrace, on the adjacent mainland, cars were bounced around, and standing on the street was described as “like being on the heaving deck of a ship at sea”. In Prince Rupert, windows were shattered and buildings swayed. —Natural resources of Canada


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Posted in Canada Earthquake, earthquake, earthquake forecast, feww earthquake forecast, seismic activity report, tsunami | Tagged: , , , , , , , | 6 Comments »

Powerful Quake Strikes Fiji

Posted by feww on November 9, 2009

Another powerful earthquake strikes Fiji – more intense seismic activity could occur in the region this year

A powerful quake measuring up to 7.3 Mw struck Fiji at 17.212°S, 178.413°E or about 100 km north of the capital, Suva and at a depth of 585 km on Monday, November 09, 2009 at 10:45 UTC.

The mainshock was followed by at least one aftershock measuring 5.3 Mw.

On August 19, 2009 FEWW Moderators posted the following entry:

New Round of Geo-Assualt at Kermadec Trench

Following the powerful 7.8 magnitude earthquake that struck the tip of the Fiordland, South island, New Zealand, followed by a large cluster of aftershocks, another round of geo-assault appears to be gearing up at the southern end of the Kermadec trench.

The Fiordland quakes occurred as a result of a large reverse faulting motion caused by the subduction of the Australian subplate under the Pacific plate, on which Fiordland rests,  in Puysegur Trench, at the Alpine Fault.

The new wave of earthquakes would instead be caused by the ‘mirror image’ action, with Pacific plate subducting beneath the Australian protoplate.

A magnitude 6.3 earthquake that struck south of the Fiji Islands on August 18, 2009 at 21:21 UTC may herald a new round of intense [and unprecedented] seismic activity at Kermadec Trench to the north, NE, and East of the North Island, as well as the north, NE, and east of the South Island, New Zealand.

10-degree Map Centered at 15°S,180°E

fiji 9Nov09
Earthquake location Map. Source: USGS/EHP. Enhanced by FEWW

Earthquake Details:

  • Magnitude: 7.2 [Maximum quake magnitude estimated by FEWW at 7.0 Mw]
  • Date-Time:
    • Monday, November 09, 2009 at 10:44:54 UTC
    • Monday, November 09, 2009 at 10:44:54 PM at epicenter
  • Location: 17.212°S, 178.413°E
  • Depth: 585.1 km (363.6 miles)
  • Region: FIJI
  • Distances:
    • 100 km (65 miles) N of SUVA, Viti Levu, Fiji
    • 135 km (85 miles) SW of Lambasa, Vanua Levu, Fiji
    • 485 km (300 miles) NW of Ndoi Island, Fiji
    • 2205 km (1370 miles) N of Auckland, New Zealand
  • Location Uncertainty: horizontal +/- 7 km (4.3 miles); depth +/- 9 km (5.6 miles)
  • Source:  USGS NEIC (WDCS-D)
  • Event ID: us2009nuam

Seismic Hazard Map
neic_nuam_w

Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green- USGS/EHP

Seismic Hazard Map

neic_nuam_7
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green- USGS/EHP

Tsunami Info:

NOAA Pacific Tsunami Warning Center reported NO destructive tsunami as a result of this event.

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Posted in earthquake, earthquake forecast, Earthquakes, eww earthquake forecast, Fiji earthquakes, seismic activity report | Tagged: , , , , , , , , , , , , , | Leave a Comment »

Powerful quake shakes Sumbawa, Indonesia

Posted by feww on November 8, 2009

M7.0 Earthquake Strikes Sumbawa, Indonesia

Powerful earthquake measuring up to 7.0Mw struck Indonesia’s Sumbawa region, about 77 km east of Tambora volcano and at an estimated  depth of 18 km, November 8, 2009 at 19:41 UTC.

Mount Tambora’s 1815 eruption (Volcanic  Explosivity Index of 7) was the largest in modern history, and perhaps the deadliest of all time, with up to an estimated 100,000 people losing their lives as a result.

Alarmed by its findings concerning the prospect of intense seismic activity in the region, FEWW featured Mt Tambora in its weekly volcano watch VolcanoWatch Weekly  dated 23 July 2009.

See also September 28, 2009 entry:  Up to 3 More Large EQs Could Strike the Pacific Ring of Fire in 2009

FEWW Moderators believe that further, intense seismic activity would most likely occur in the region in the near future.

10-degree Map Centered at 10°S,120°E

sumbawa - I
Earthquake location Map. Source: USGS/EHP. Enhanced by FEWW

Earthquake Details:

  • Magnitude: 6.7  [Maximum quake magnitude estimated by FEWW at 7.0 Mw]
  • Date-Time:
    • Sunday, November 08, 2009 at 19:41:44 UTC
    • Monday, November 09, 2009 at 03:41:44 AM at epicenter
  • Location: 8.316°S, 118.697°E
  • Depth: 18.3 km (11.4 miles) (poorly constrained)
  • Region: SUMBAWA REGION, INDONESIA
  • Distances:
    • 15 km (10 miles) NNW of Raba, Sumbawa, Indonesia
    • 310 km (190 miles) ENE of Mataram, Lombok, Indonesia
    • 330 km (205 miles) W of Ende, Flores, Indonesia
    • 1335 km (830 miles) E of JAKARTA, Java, Indonesia
  • Location Uncertainty: horizontal +/- 9.3 km (5.8 miles); depth +/- 33 km (20.5 miles)
  • Source:  USGS NEIC (WDCS-D)
  • Event ID: us2009nta5

Tsunami Info:

NOAA Pacific Tsunami Warning Center Center issued the following evaluation:

A destructive widespread tsunami threat does NOT exist based on   historical earthquake and tsunami data.   However – there is a very small possibility of a local tsunami that could affect coasts located usually no more than a hundred kilometers from the earthquake epicenter. Authorities in the region near the epicenter should be made aware of this possibility.

Historic Seismicity

neic_nta5_7  indonesia 9Nov09
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green- USGS/EHP

Seismic Hazard Map

neic_nta5_w - 9Nov09

Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green- USGS/EHP

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Posted in earthquake forecast, Earthquakes, feww earthquake forecast, Indonisia earthquakes, seismic activity report, seismic hazard report | Tagged: , , , , , , , , , | 1 Comment »

Arabia Shakes

Posted by feww on November 5, 2009

Arabian Plate Jolted by Quake Cluster at Boundaries in Gulf of Aden

As of posting 4 events had occurred in the region, the largest of which is estimated at 5.8 Mw. The events occurred at a depth of about 10 km.

A Wave of Intense Seismicity May Break up Arabian Plate!

In your lifetime you could see large earthquakes and volcanic explosions breaking up the Arabian plate,  creating  one or more islands from its southern half.

arabian plate saudi geological survey

Arabian Plate. Image Credit: Saudi Arabian Geological Survey

The western boundary of the Arabian plate is a transform fault zone — the Dead Sea and East Anatolian faults —where the adjacent plates grind past each other. Rifts of the Red Sea and Gulf of Aden constitute the southern boundary, where Arabia and Africa are pulling apart. The Zagros and Makran mountain ranges mark the present collision zone. Blocks north and east of the collision zone (the Lut and Helmand blocks) arrived on the shores of Eurasia much earlier and are being jostled about during the current event …  Tectonics of the Arabian Plate/ Johnson Space Center/NASA

FEWW Arabia Earthquake and Volcanic Activity Forecast

The GFZ Potsdam Earthquake Bulletin reported the events as follows

Event No. 1

Region: Western Gulf of Aden
Time: 2009-11-05 06:23:05.2 UTC
Magnitude: 4.4
Epicenter: 45.70°E 12.21°N
Depth: 10 km
Status: manually revised

gfz2009vqxu
Earthquake Location Map. © Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum – GFZ

Event No. 2

Region: Western Gulf of Aden
Time: 2009-11-05 07:12:35.7 UTC
Magnitude: 5.6
Epicenter: 46.07°E 12.10°N
Depth: 20 km
Status: manually revised

Tectonics of the Arabian Plate

A17-148-22718
The African, Arabian and Indian crustal plates have been marching northward to collide with Eurasia — for about 20 million years in the case of Arabia, and for 50 million years in the case of India. The result has been a collage of plate pieces and mountain ranges that extend from the Pyrenees in the west, across southern Europe and the Middle East, through the Himalayas and the ranges of southeast Asia. Incorporated within that broad band are continental fragments that moved across the ocean and separately crashed into Eurasia; structures of some of those fragments have been reactivated during the present collision. Image and Caption: Johnson Space Center/NASA

10-degree Map Centered at 10°N,45°E

EQ location Map USGS
Earthquake Location Map. Source: USGS/EHP. Enhanced by FEWW

Seismic Hazard Map

neic_nqal_w
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Seismic Hazard Map

Event No. 3

Region: Western Gulf of Aden
Time: 2009-11-05 07:57:30.1 UTC
Magnitude: 4.8
Epicenter: 46.11°E 11.96°N
Depth: 10 km
Status: manually revised

Event No. 4

Region: Western Gulf of Aden
Time: 2009-11-05 08:05:52.6 UTC
Magnitude: 5.1
Epicenter: 45.95°E 12.13°N
Depth: 17 km
Status: manually revised

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Posted in earthquake forecast, feww earthquake forecast, seismic activity, seismic activity report, seismic event report | Tagged: , , , , , , , , , , , , , | 3 Comments »

Seventh Powerful Quake Hits Japan Region

Posted by feww on October 30, 2009

Powerful Earthquake measuring up to 7.2 Mw Strikes  RYUKYU ISLANDS, JAPAN

Background:

A powerful earthquake measuring up to 7.2 Mw occurred in Ryukyu Islands, Japan, about 280 km (175 miles) SSW of Kagoshima, Kyushu, at a depth of 35 km (21.7 miles), on Friday, October 30, 2009 at 07:03 UTC.

Referring to an earlier forecast, FEWW Moderators believe an additional series of 6 – 7 quakes measuring ≥ 6.0 Mw could strike Japan region in the coming weeks.

FEWW Moderators had previously anticipated more powerful earthquakes in the region, including as many as 10 additional magnitude 6+ quakes to strike the region in the coming weeks.

A moderate earthquake measuring up to 5.3 Mw struck near 29.165°N, 130.061°Eclose to the latest event on Sunday, October 25, 2009 at 06:17 UTC at a depth of about 47.5 km (29.5 miles).

10-degree Map Centered at 30°N,130°E

RYUKYU ISLANDS -  JAPAN - 30-10-2009
Earthquake Location Map. Source: USGS/EHP. Map enhanced by FEWW.

Earthquake Details:

  • Reported Magnitude: 6.9 [Maximum quake magnitude estimated by FEWW at 7.2 Mw]
  • Date-Time:
    • Friday, October 30, 2009 at 07:03:39 UTC
    • Friday, October 30, 2009 at 04:03:39 PM at epicenter
  • Location: 29.154°N, 129.903°E
  • Depth:  35 km (21.7 miles)
  • Region:  RYUKYU ISLANDS, JAPAN
  • Distances:
    • 280 km (175 miles) SSW of Kagoshima, Kyushu, Japan
    • 340 km (210 miles) SSW of Miyazaki, Kyushu, Japan
    • 400 km (245 miles) NNE of Naha, Okinawa, Japan
    • 1170 km (730 miles) SW of TOKYO, Japan
  • Location Uncertainty:  horizontal +/- 5.5 km (3.4 miles)
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2009njal

Seismic Hazard Map [USGS]

seis nes  30oct09
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Historic Seismicity [Source: USGS?EHP]

RIJ his seis
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

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Posted in earthquake forecast, Eurasian Plate, filipino plate, Japan quakes 2009, Japan quakes history, North American plate, Pacific palte, seismic activity report | Tagged: , , , , , , , , , | 4 Comments »

Hindu Kush Rattled by Another Strong Quake

Posted by feww on October 30, 2009

Strong quake measuring up to 6.3 magnitude shook Hindu Kush Region, Afghanistan

The event was consistent with FEWW Forecast

The quake struck about 18 km WSW of another strong quake which struck the region a week ago.

10-degree Map Centered at 40°N,70°E

hindukush 10-30-2009
Earthquake Location Map. Source: USGS/EHP. Map enhanced by FEWW.

Earthquake Details

  • Magnitude: 6.0 [Maximum quake magnitude estimated by FEWW at 6.3 Mw]
  • Date-Time: Thursday, October 29, 2009 at 17:44:31 UTC
    [Thursday, October 29, 2009 at 10:14:31 PM at epicenter]
  • Location: 36.434°N, 70.731°E
  • Depth: 205.6 km (127.8 miles)
  • Region:  HINDU KUSH, AFGHANISTAN
  • Distances:
    • 75 km (45 miles) SSE of Feyzabad, Afghanistan
    • 130 km (80 miles) WNW of Chitral, Pakistan
    • 140 km (90 miles) SSW of Khorugh, Tajikistan
    • 255 km (160 miles) NNE of KABUL, Afghanistan
  • Location Uncertainty:  horizontal +/- 4.5 km (2.8 miles); depth +/- 7 km (4.3 miles)
  • Source: USGS NEIC (WDCS-D)
  • Event ID:  us2009niba

hindu kush
Earthquake Location Map. Source: USGS/EHP. Map enhanced by FEWW.

After an earlier event in the area, a magnitude 6.4 quake which struck close to today’s epicenter almost exactly a week ago, FEWW forecast:

Further seismicity in the region should be expected in the coming days and weeks. An earthquake measuring up to 8.4 may occur in the region with a probability of 60 percent.”

Historic Seismicity Map

hist seis
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green- (Source: USGS/EHP)

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Powerful Earthquake Strikes Banda Sea

Posted by feww on October 25, 2009

Powerful Quake Measuring up to 7.3 Magnitude Strikes Banda Sea

A powerful earthquake measuring up to 7.3 Mw struck Banda Sea about 40 km WNW of Serua volcano and 65 km south of Manuk volcano, on Saturday, October 24, 2009 at 14:41 UTC.

The quake occurred at 6.161°S, 130.346°E, some 230 km  NNW of Saumlaki, Tanimbar Islands, Indonesia, at a depth of about 140 km. It was followed by a moderate quake measuring up to 5.3 Mw, which struck at 6.749°S, 131.601°E, on Sunday, October 25, 2009 at 00:35:06 UTC.

On February 21, 1938, a large quake measuring M 8.5 struck about 185 km northeast of Saturday’s quake  at a depth of 25km.

FEWW Forecast:

Based on an analysis of seismic activity in the region, FEWW Moderators believe a large earthquake measuring up to M 8.6 could strike Banda Sea in the next 3 – 6 months. Additional events measuring 6.0 to 7.6 Mw could also be expected in the region, anytime.

See also Earthquake Forecast: Timor Sea

10-degree Map Centered at 5°S,130°E

banda sea 25-10-09
Earthquake Location Map. Source: USGS/EHP. Enhanced by FEWW

Tsunami Warning:

This earthquake was located too deep inside the earth to generate a destructive tsunami in the Indian ocean, NOAA PTWC said.

Earthquake Details

  • Magnitude:  [7.3 Mw – estimated by FEWW]
  • Date-Time:
    • Saturday, October 24, 2009 at 14:40:44 UTC
    • Saturday, October 24, 2009 at 11:40:44 PM at epicenter
  • Location: 6.161°S, 130.346°E
  • Depth: 138.5 km (86.1 miles)
  • Region: BANDA SEA
  • Distances:
    • 230 km (145 miles) NNW of Saumlaki, Tanimbar Islands, Indonesia
    • 365 km (225 miles) SE of Ambon, Moluccas, Indonesia
    • 700 km (435 miles) N of DARWIN, Northern Territory, Australia
    • 2610 km (1620 miles) E of JAKARTA, Java, Indonesia
  • Location Uncertainty:  horizontal +/- 6.6 km (4.1 miles); depth +/- 9.2 km (5.7 miles)
  • Source:USGS NEIC (WDCS-D)
  • Event ID: us2009ndan

Population Exposure:

Overall, the population in this region resides in structures that are vulnerable to earthquake shaking, though some resistant structures exist. A magnitude 6.6 earthquake 360 km Northwest of this one struck Indonesia on March 12, 1983 (UTC), with estimated population exposures of 126,000 at intensity VII and 204,000 at intensity VI, with no reported fatalities. On June 17, 1987 (UTC), a magnitude 7.1 earthquake 82 km Northeast of this one struck Indonesia, with estimated population exposures of 1,000 at intensity VI and 82,000 at intensity V, with no reported fatalities. Source: USGS/EHP

Estimated Population Exposed to Earthquake Shaking

Historic Seismicity

neic_ndan_7 25-10-09
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

neic_ndan_w - SeisHaz 25-10-09
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

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Posted in earthquake forecast, Earthquakes, feww earthquake forecast, seismic activity report, seismic hazard report | Tagged: , , , , , , , , , , | 1 Comment »

Strong Earthquake Rattles Hindu Kush, Afghanistan

Posted by feww on October 23, 2009

Strong Quake Measuring as Large as M6.5 Rattles Hindu Kush, Afghanistan

An earthquake measuring as strong as 6.5Mw struck the Hindu Kush region, shaking northern Afghanistan and Pakistan early Friday, local time.

The epicenter was located at 36.471°N, 70.925°E  in the Hindu Kush mountain range about 75 km (50 miles) SSE of Feyzabad, Afghanistan, striking at a depth of about 197 km.

There have been no immediate reports of casualties or structural damage, however, news from the remote mountainous areas may take some time to reach the outside world.. However, frightened locals were reportedly seen escaping into the open areas in Islamabad, Lahore, Peshawar and Rawalpindi and other major cities in the region. A news report said buildings in Kabul (the Afghan capital) shook during the earthquake.

10-degree Map Centered at 35°N,70°E

hindu kush
Earthquake Location Map. Source: USGS/EHP. Map enhanced by FEWW.

Historic Seismicity

More than a dozen EQs measuring 5.0 to 6.0 Mw have struck the immediate region since August 2008. The latest quake occurred about  240 km southeast of a major quake measuring more than 8.0Mw, which struck the region 102 years earlier almost to the date,  on October 21, 1907 at 04:23 UTC at a depth of 35 km.

Other quakes in the region:

  • Magnitude 6.5, on December 12, 2005 at 21:47:46 UTC –  Location 36.332°N, 71.130°E – Depth 225.4 km  – Distances: 95 km (60 miles) NW of Chitral, Pakistan; 95 km (60 miles) SSE of Feyzabad, Afghanistan; 135 km (85 miles) SSW of Khorugh, Tajikistan; 350 km (220 miles) NNW of ISLAMABAD, Pakistan. (5 people killed, another 28 injured.)
  • Magnitude 6.6, Monday, April 5, 2004 at 21:24:04 (UTC); Location 36.527°N, 71.028°E;  Depth 191.4 km – Distances: 75 km (45 miles) SSE of Feyzabad, Afghanistan; 110 km (70 miles) NW of Chitral, Pakistan; 120 km (75 miles) SSW of Khorugh, Tajikistan; 280 km (175 miles) NE of KABUL, Afghanistan. (3 people killed, at least a dozen injured.)
  • Magnitude 6.1,  25 March 25,  2002 at 14:56:33 UTC; Location 36.06N 69.31E; Depth 8.0 kilometers – Distances 160 km (100 miles) SW of Feyzabad, Afghanistan; 170 km (105 miles) SE of Shaartuz, Tajikistanl; 170 km (105 miles) N of KABUL, Afghanistan; ;  210 km (130 miles) NNW of Jalalabad, Afghanistan.
    Remarks:
    At least 1,000 people killed, several hundred injured and several thousand homeless in Baghlan Province. At least 1,500 houses destroyed or damaged at Nahrin and several hundred more in other areas of Baghlan Province. Landslides blocked many roads in the epicentral area. Felt strongly in much of northern Afghanistan. Also felt in the Islamabad-Peshawar area, Pakistan and at Dushanbe, Tajikistan. [Source: USGS/EHP]
  • Magnitude 7.4, March 3,  2002 at 12:08:19 UTC; Location 36.50N 70.48E; Depth 225.0 kilometers – Distances: 65 km (40 miles) S of Feyzabad, Afghanistan; 150 km (90 miles) SW of Khorugh, Tajikistan; 150 km (95 miles) WNW of Chitral, Pakistan; 250 km (155 miles) NNE of KABUL, Afghanistan.
    Remarks:
    At least 166 people killed, several injured and 400 houses damaged or destroyed by a landslide that dammed and flooded Surkundara Valley, Samangan Province. At least 13 people killed at Kabul and Rostaq and 3 people killed in Bajaur, Pakistan. At least 300 houses destroyed in Badakhshan and Takhar Provinces. A 45 meter wide fissure opened in Xiker Reservoir in Xinjiang, China. Felt in much of Afghanistan and Pakistan. Felt (VI) at Dushanbe, Tajikistan. Felt (V) at Qarshi, Samarqand and Tashkent; (IV) at Andijon and Namangan, Uzbekistan. Felt (V) at Osh; (IV) at Batken and Sufi- Kurgan; (III) at Bishkek, Kyrgyzstan. Felt (III) at Shymkent, Taraz and Zhambyl, Kazakhstan. Also felt in India and Xinjiang, China. [Source: USGS/EHP]
  • Magnitude 7.8, March 14,  1965 AT 15:53:06 UTC  [NO FURTHER DETAILS AVAILABLE.] Remarks: Two people were injured at Peshawar, Pakistan. Slight damage occurred in Afghanistan and western Pakistan. The shock was felt as far away as New Delhi, India and Tashkent, Uzbekistan (Uzbek SSR, USSR).

FEWW Forecast:

Further seismicity in the region should be expected in the coming days and weeks. An earthquake measuring up to 8.4 may occur in the region with a probability of 60 percent.

This Earthquake

  • Magnitude:   6.2 [possibly as high as 6.5 Mw]
  • Date-Time:  Thursday, October 22, 2009 at 19:51:28 UTC   [Friday, October 23, 2009 at 12:21:28 AM at epicenter]
  • Location: 36.471°N, 70.925°E
  • Depth: 196.5 km (122.1 miles)
  • Region: HINDU KUSH REGION, AFGHANISTAN
  • Distances:
    • 75 km (50 miles) SSE of Feyzabad, Afghanistan
    • 115 km (70 miles) NW of Chitral, Pakistan
    • 130 km (80 miles) SSW of Khorugh, Tajikistan
    • 270 km (165 miles) NE of KABUL, Afghanistan
  • Location Uncertainty: horizontal +/- 7.3 km (4.5 miles); depth +/- 28.6 km (17.8 miles)
  • Source: USGS NEIC (WDCS-D)
  • Event ID:  us2009nbbf

Historic Seismicity Map

hist seis
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green- (Source: USGS/EHP)

Related Links:


Posted in earthquake forecast, Earthquakes, feww earthquake forecast, seismic activity report, seismic hazard report | Tagged: , , , , , , | 1 Comment »

Strong Quake Strikes Sunda Strait, Indonesia

Posted by feww on October 16, 2009

Strong Quake Measuring up to 6.4 Mw Strikes Sunda Strait, Indonesia

Strong earthquake measuring about 6.4 Mw struck Sunda Strait about 180 km WSW of JAKARTA, island of Java, Indonesia, at a depth of about 55km on Friday, October 16, 2009 at 09:53 UTC.

Some buildings  in the capital, Jakarta, were reported as swaying by the officials. So far there are no reports damage or casualties. A magnitude 7.9 quake, which struck southern Sumatra on September 30, left up to 1,200 people dead.


The quake shook buildings as far away as Jakarta, causing some people to leave their homes and offices. (Photo: Amee Enriquez, JG). Image may be subject to copyright.

Earthquake Details:

GFZ Potsdam – Earthquake Bulletin
Region: Sunda Strait, Indonesia
Time: 2009-10-16 09:52:55.9 UTC
Magnitude: 6.2  [Maximum quake magnitude estimated by FEWW at 6.4Mw]
Epicenter: 105.45°E 6.47°S
Depth: 64 km
Status: automatic

10-degree Map Centered at 5°S,105°E

sunda strait 16 oct 09
Earthquake Location Map. Source: USGS/EHP. Enhanced by FEWW.

USGS/EHP Release

  • Magnitude: 6.1 [Maximum quake magnitude estimated by FEWW at 6.4Mw]
  • Date-Time:
    • Friday, October 16, 2009 at 09:52:52 UTC
    • Friday, October 16, 2009 at 04:52:52 PM at epicenter
  • Location: 6.613°S, 105.182°E
  • Depth: 50.6 km (31.4 miles)
  • Region: SUNDA STRAIT, INDONESIA
  • Distances:
    • 125 km (80 miles) S of T.-Telukbetung, Sumatra, Indonesia
    • 180 km (115 miles) WSW of JAKARTA, Java, Indonesia
    • 185 km (115 miles) W of Sukabumi, Java, Indonesia
    • 265 km (165 miles) W of Bandung, Java, Indonesia
  • Location Uncertainty: horizontal +/- 6.3 km (3.9 miles); depth +/- 8.8 km (5.5 miles)
  • Source: USGS NEIC (WDCS-D)
  • Event ID:  us2009mva4

Related Links [Including FEWW forecasts]

Posted in earthquake forecast, Earthquakes, feww earthquake forecast, seismic activity report, seismic hazard report | Tagged: , , , , , , | 1 Comment »

Strong Quakes Strikes Bhutan

Posted by feww on September 21, 2009

Magnitude 6.1 [possibly 6.4] Earthquake Strikes East of Thimphu, Bhutan

Strong earthquake measuring 6.1 to 6.4 Mw struck Bhutan 135 km NNW of Gauhati, Assam, India

Bhutan is a small landlocked country located at the eastern end of the Himalaya Mountains in South Asia, bordered by India  (south, east and west) and China (north).

The quake caused landslides blocking roads to mountanous regions, killing about a dozen people and destroying a few homes and a monstary in the nearby Tashigang district, according to media reports.

The quake was felt in Assam state, NW India, which borders Bhutan, but there were no reports of damage there, as of posting.

Bhutan
Map of Bhutan with the approximate position of the EQ marked.

Summary from: European-Mediterranean Seismological Center
Magnitude: Mw 6.4
Region: BHUTAN

Date time: 2009-09-21 at 08:53:06.0 UTC
Location: 27.47 N ; 91.48 E
Depth: 10 km
Distances:

  • 45 km NW Guwahati (pop 899,094 ; local time 14:23 2009-09-21)
  • 99 km NW Tangla (pop 17,724 ; local time 14:23 2009-09-21)
  • 12 km S Trashiyangtse (pop 3,025 ; local time 14:53 2009-09-21)

EQ Details:  GFZ Potsdam – Earthquake Bulletin
Region: Bhutan
Time: 2009-09-21 08:53:06.3 UTC
Magnitude: 6.1
Epicenter: 91.46°E 27.34°N
Depth: 18 km
Status: manually revised

10-degree Map Centered at 25°N,90°E

locmap bhutan
EQ Location Map. Original map: USGS

Source of EQ Data: USGS NEIC (WDCS-D)

Magnitude: 6.1
Date-Time:

  • Monday, September 21, 2009 at 08:53:05 UTC
  • Monday, September 21, 2009 at 02:53:05 PM at epicenter

Location: 27.352°N, 91.424°E
Depth:  10 km (6.2 miles)
Region: BHUTAN
Distances:

  • 135 km (85 miles) NNW of Gauhati, Assam, India
  • 180 km (110 miles) E of THIMPHU, Bhutan
  • 615 km (380 miles) NNE of Kolkata (Calcutta), West Bengal, India

Location Uncertainty:  horizontal +/- 6.1 km (3.8 miles)
Parameters NST=134, Nph=134, Dmin=>999 km, Rmss=1.02 sec, Gp= 22°, M-type=teleseismic moment magnitude (Mw), Version=8

Related Links:


Posted in Assam, Bhutan quake, India, seismic activity report, THIMPHU, volcanic activity | Tagged: , , , , , | Leave a Comment »

Strong Quake Strikes Offshore Mindoro, Philippines

Posted by feww on September 18, 2009

FOR MARCH 25, 2010 Earthquake Details click >>

Strong Quake Strikes Mindoro Philippines

Magnitude 6.0 earthquake strikes near Mindoro, Philippines

An earthquake measuring 6.0 Mw struck in the South China Sea off the west coast  of Mindoro, Philippines, at a depth of 50.1 km on September 18, 2009  at 06:23:58 UTC, USGS/ EHP said.

10-degree Map Centered at 15°N,120°E

sep 18 10-00UTC
Earthquake Location Map. Source of the original map: USGS

Earthquake Details

  • Magnitude: 6.0
  • Date-Time:
    • Friday, September 18, 2009 at 06:23:58 UTC [Friday, September 18, 2009 at 02:23:58 PM at epicenter]
  • Location: 12.573°N, 120.469°E
  • Depth: 50.1 km (31.1 miles)
  • Region: MINDORO, PHILIPPINES
  • Distances:
    • 115 km (75 miles) SW of Calapan, Mindoro, Philippines
    • 145 km (90 miles) SSW of Batangas, Luzon, Philippines
    • 230 km (145 miles) SSW of MANILA, Philippines
    • 250 km (155 miles) S of Olongapo, Luzon, Philippines
  • Location Uncertainty: horizontal +/- 8.9 km (5.5 miles); depth +/- 11.7 km (7.3 miles)
  • Parameters NST= 52, Nph= 52, Dmin=827.4 km, Rmss=1.24 sec, Gp= 47°, M-type=teleseismic moment magnitude (Mw), Version=7
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2009lsap

The Philippine Institute of Volcanology and Seismology (Phivolcs) reported the quake as a magnitude 6.1 shock on the Richter scale.

Phivolcs said the quake was felt at various intensities in Mamburao and Batangas City; Makati City, Pasay City, Manila City, Tagaytay City and Dasmariñas City;  in San Jose town (in Occidental Mindoro), Puerto Galera, Malay (in Aklan), and Guinayangan (in Quezon).

Phivolcs also said it was expecting aftershocks and some damage caused by the earthquake; however, as of posting, no damage had been reported.

There was no report of tsunami after the  quake.

Seismic Hazard Map

Seismic Hazard Map-midoro

Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Historic Seismicity

Historic Seismicity - mindoro
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Related Links:

Posted in earthquake forecast, Earthquakes, Mamburao, Mayon Volcano, PHIVOLCS, seismic activity report, Taal Volcano, volcanic activity | Tagged: , , , , , , , | 8 Comments »

Strong Earthquake Strikes Offshore N Venezuela

Posted by feww on September 13, 2009

Magnitude 6.4 Quake Strikes Offshore Aragua, Northern Venezuela

An earthquake measuring 6.4 Mw struck offshore Aragua, northern Venezuela about 100 km west of Caracas, the Venezuelan capital at a depth of 10 km on Saturday, September 12, 2009 at 20:06 UTC, according to USGS/EHP.

NOAA/NWS/West Coast and Alaska Tsunami Warning Center issue the following Tsunami Information Statement on 09/12/2009 at 4:15PM AST:

A strong earthquake has occurred, but a tsunami IS NOT expected along the coasts of Puerto Rico, the Virgin Islands, U.S. Atlantic and Gulf of Mexico states, and Eastern Canadian provinces. NO tsunami warning, watch or advisory is in effect for these areas.

Based on the earthquake location, magnitude, and historic tsunami records, a damaging tsunami IS NOT expected along the Puerto Rico, Virgin Islands, U.S. Atlantic, Eastern Canadian and Gulf of Mexico coasts.

USGS/EHP had again downgraded their original reading from 7.0 to 6.4Mw.

Venezuelan Interior Minister reported that two people had received major leg injuries, with 12 others suffering less serious injuries as a result of the damage caused by the quake.

Venezuela’s emergency services chief, Luis Diaz Curbelo, reportedly said the quake was felt across the country.

At least seven people were injured and several buildings were damaged in the NW state of Falcon, the worst hit area, he said.

Another report  said the parts of the capital and several other regions were left without electricity.

10-degree Map Centered at 10°N,70°W

venezuela 12-09-09
Earthquake Location. Source of Original map: USGS

Seismic Hazard Map

venezuela  Seismic Hazard Map
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Historic Seismicity

Historic Seismicity venezuela
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Earthquake details

  • Magnitude: 6.4
  • Date-Time:
  • Saturday, September 12, 2009 at 20:06:25 UTC [ Saturday, September 12, 2009 at 08:06:25 PM at epicenter]
  • Location: 10.757°N, 67.847°W
  • Depth: 10 km (6.2 miles)
  • Region:  OFFSHORE ARAGUA, VENEZUELA
  • Distances:
    • 35 km (25 miles) NNE of Puerto Cabello, Venezuela
    • 60 km (35 miles) NNE of Valencia, Venezuela
    • 100 km (65 miles) W of CARACAS, Venezuela
    • 2115 km (1310 miles) SE of Miami, Florida
  • Location Uncertainty: horizontal +/- 5.4 km (3.4 miles);
  • Parameters:  NST=197, Nph=197, Dmin=806.2 km, Rmss=1.12 sec, Gp= 36°, M-type=teleseismic moment magnitude (Mw), Version=7
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2009llbc

Posted in oil refinery, opec port, seismic activity report, Subduction Zones, Tectonic Boundaries, Transform Faults | Tagged: , , , , , , , , | Leave a Comment »

Another Busy Day for Earthquakes

Posted by feww on September 8, 2009

Magnitude 6.2 Strikes South of Java, Indonesia

10-degree Map Centered at 10°S,110°E

South of Java  Indonesia - USGS map
EQ Location Map. USGS Map.

Earthquake Details

GFZ Potsdam – Earthquake Bulletin
Region: South of Java, Indonesia
Time: 2009-09-07 16:12:22.0 UTC
Magnitude: 6.2
Epicenter: 110.59°E 10.34°S
Depth: 20 km
Status: manually revised

South of Java  Indonesia
© Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum – GFZ

The earthquake occurred close to a site forecast by FEWW as epicenter of a major 2009 earthquake measuring  ≥ 8.4 Mw. [See location map above.]

Meanwhile …

Magnitude 5.0  EQ struck  Hokkaido,  Japan Region

The quake struck onshore close to the south coast of Hokkaido on September 07, 2009 at 16:24 UTC. The earthquake was the second of the same size to strike the area in 5 days.

10-degree Map Centered at 40°N,145°E
Hokkaido
EQ Location Map. Source: USGS

EQ Details:

  • Magnitude: 5.0
  • Date-Time:  Monday, September 07, 2009 at 16:24:27 UTC [Tuesday, September 08, 2009 at 01:24:27 AM at epicenter]
  • Location: 42.167°N, 142.824°E
  • Depth: 71 km (44.1 miles)
  • Region:  HOKKAIDO, JAPAN REGION
  • Distances:
    • 155 km (100 miles) SW of Kushiro, Hokkaido, Japan
    • 160 km (100 miles) SE of Sapporo, Hokkaido, Japan
    • 770 km (480 miles) NNE of TOKYO, Japan
    • 7095 km (4400 miles) NE of MOSCOW, Russia
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2009lgbc

JAPAN  EARTHQUAKE  UPDATE:

At 10:03 JST on   Sep 08, 2009  a  magnitude   3.9    quake struck  Chiba-ken Hokuseibu region centered at  35.8N,  140.1E and at a depth of  50km, JMA reported. [For background information and FEWW forecast see:  Earthquake Forecast: Tokyo, Japan]

Soon after, Sicily was struck …

Magnitude 5.0 EQ Strikes Sicily, Italy

The quake struck on Monday, September 07, 2009 at 21:26 UTC.

10-degree Map Centered at 40°N,15°E
sicily
EQ Location Map. Source: USGS

Earthquake Details

  • Location: 38.652°N, 14.074°E
  • Depth: 10 km (6.2 miles)
  • Region:  SICILY, ITALY
  • Distances:
    • 85 km (50 miles) NE of Palermo, Sicily, Italy
    • 140 km (85 miles) WNW of Messina, Sicily, Italy
    • 155 km (95 miles) NW of Catania, Sicily, Italy
    • 385 km (240 miles) SSE of ROME, Italy
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2009lgbr

See also: FEWW forecast: Earthquake Forecast: Southern Italy, Sicily

An hour or so later …

Magnitude 6.2 Strikes  Georgia (SAK’ART’VELO)

The strong mainshock was followed by a magnitude 5.0 aftershock about 8 minutes later.

10-degree Map Centered at 45°N,45°E
Georgia
EQ Location Map. Source: USGS

EQ Details (mainshock)

  • Magnitude: 6.2
  • Date-Time: Monday, September 07, 2009 at 22:41:37 UTC [Tuesday, September 08, 2009 at 03:41:37 AM at epicenter]
  • Location: 42.712°N, 43.483°E
  • Depth: 10 km (6.2 miles) set by location program
  • Region: GEORGIA (SAK’ART’VELO)
  • Distances:
    • 80 km (50 miles) NE of K’ut’aisi, Georgia
    • 105 km (65 miles) WSW of Vladikavkaz, Russia
    • 135 km (85 miles) E of Zugdidi, Georgia
    • 155 km (95 miles) NW of TBILISI, Georgia
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2009lgbw

The two events were similar to a pair of quakes, measuring 5.9 and 5.3, that struck  eastern Chechnya at a depth of 10km, about 240km to the NE, on October 11, 2008.

The Chechnya quakes killed more than a dozen people and injured up to 150 others.

Related Links:

Posted in Hokkaido quake, Italy quake, Japan quakes, Palermo, SAK'ART'VELO quake, seismic activity report | Tagged: , , , , | 1 Comment »

Magnitude 6.2 Quake Strikes Kyushu, Japan

Posted by feww on September 3, 2009

Strong 6.2 Mw quake strikes off the south-western tip of the Island of Kyushu, Japan

The earthquake, reported by various seismic monitoring centers, occurred on Thursday, September 03, 2009 at 13:26 UTC at a depth of about 160 km some 70 km SW of Kagoshima, Kyushu, Japan.

The 6th strong quake to strike Japan Region in the past several weeks, this event was consistent with FEWW earlier forecast. On August 17, FEWW Moderators  forecast a series of  powerful earthquakes in the region and said as many as 10 additional magnitude 6+ quakes could yet strike the region in coming weeks.

Summary of this earthquake:

GFZ Potsdam – Earthquake Bulletin
Region:     Kyushu, Japan
Time:     2009-09-03 13:26:18.4 UTC
Magnitude:     6.2
Epicenter:     130.19°E   31.18°N
Depth:     166 km

© Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum – GFZ


JMA Map shows the intensity of th equake as recorded by various stations throughout the Islands of Kyushu and Honshu, Japan.
Image may be subject to copyright.

Japan Meteorological Agency (JMA) reported NO tsunami caused by  this quake.

There was no report of any casualties at the time of posting.

10-degree Map Centered at 30°N,130°E

Magnitude 6.2 - KYUSHU - JAPAN 3-09-09

Earthquake Location Map. Source: USGS/EHP. Enhanced by FEWW.

Seismic Hazard Map [Source: USGS]

kyushu 3-09-09  neic_lcaq_w -
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Historic Seismicity [Mag 7+ EQs since 1900] – USGS

kyushu 3-09-09 neic_lcaq_7
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Related Links

Posted in Earthquakes, Fukuoka, global earthquakes, Okinawa Islands, seismic activity report, Seismic Hazard | Tagged: , , , , , , | Leave a Comment »

Deadly Quake Strikes Indonesia – UPDATE

Posted by feww on September 2, 2009

Background:

Deadly Earthquake Strikes Java, Indonesia

UPDATE:

  • At least 40 people are killed by the powerful quake, with twice as many missing, feared dead.
  • Up to a thousand buildings have been destroyed or damaged.
  • About 350 people injured.
  • The worst hit areas are  Cianjur, about 100km south of the capital Jakarta, city of Tasikmalaya and the town of Sukabumi.


A couple takes pictures of their damaged house after an earthquake in Pangalengan, West Java, September 3, 2009. REUTERS/Supri. Image may be subject to copyright.

More Images: Reuters

For future  updates, see comments sections.

Related Links

Posted in earhquake forecast, earhquakes, earthquake report, earthquake update, seismic activity report | Tagged: , , , , , , , | 2 Comments »

Strong EQ Strikes Northern Qinghai, China

Posted by feww on August 28, 2009

Magnitude 6.2 earthquake shakes Northern Qinghai, China, followed by large aftershocks

Strong Earthquake measuring 6.2 Mw struck Northern Qinghai, China, about 35 km ESE of Da Qaidam, Qinghai, China, at a depth of 10 km, on Friday, August 28, 2009 at 01:52 UTC, USGS EHP reported.

The earthquake was followed by at least 4 large aftershocks at the time of writing, two of which measured 5.6 Mw.

Based on FEWW analysis, the earthquake may have been as powerful as a magnitude 6.9 shock, possibly larger, and probably misreported by USGS EHP.

China’s official news agency (Xinhua) reported the event as follows:

6.4-magnitude earthquake jolts NW China

http://news.xinhuanet.com/english/2009-08/28/content_11957440.htm

XINING, Aug. 28 (Xinhua) — An earthquake measuring 6.4 on the Richter scale struck the remote Qinghai Province in northwest China at 9:52 a.m. Friday, the China Earthquake Administration said, but no casualties have been reported.

A total of 128 aftershocks had been registered by 11 a.m. near the epicenter in the Da Qaidam (also known as Dachaidan) district in the Mongolian-Tibetan Autonomous Prefecture of Haixi, with the strongest measuring 5.3 magnitude that struck at 10:14, according to the Qinghai Provincial Seismological Network.

“So far, we have not received reports of casualties or house collapses,” the provincial government said in a statement.

“The governments of the province, the Haixi prefecture and Golmud City have sent staff to investigate,” it said.

The epicenter, at 37.6 degrees north and 95.8 east, was about 140 km away from Delingha City, the capital of the Haixi prefecture, and about 160 km away from Golmud, another major city in Haixi, according to the China Earthquake Administration.

The quake was strongly felt in both cities, the administration said.

The China Earthquake Administration, the National Disaster Reduction Committee and the Ministry of Civil Affairs have all sent staff to the quake-hit region for relief work.

Da Qaidam is a sparsely populated district with an average altitude of 4,000 meters and about 16,000 people, including Mongolians, Tibetans, Muslim Hui and Han. The district covers 34,000 square km and administers three townships.

Da Qaidam, which literally means “a big salt lake” in Mongolian, is rich in mineral resources, with one of the largest lead-zinc mines in western China and several coal mines. [Emphasis added by Moderator.]

On Nov. 10 last year, a 6.3-magnitude quake struck Da Qaidam but did not cause casualties. The quake only toppled several huts and caused cracks in the walls of some mud houses.

In April 2003, a 6.6-magnitude quake hit the same region but did not cause casualties, either, and only damaged old buildings. Editor: Anne Tang – copyright the news agency.

FEWW strongly believes that this earthquake was triggered by human activity, especially the extensive mining operations in the region.

10-degree Map Centered at 40°N,95°E

N QINGHAI, CHINA
Earthquake Location Map. Original map: USGS EHP. Image upgraded by FEWW.

  • Magnitude: 6.2
  • Date-Time: Friday, August 28, 2009 at 01:52:06 UTC
  • Location: 37.721°N, 95.684°E
  • Depth: 10 km (6.2 miles)
  • Region: NORTHERN QINGHAI, CHINA
  • Distances:
    • 35 km (20 miles) ESE of Da Qaidam, Qinghai, China
    • 165 km (100 miles) NNE of Golmud, Qinghai, China
    • 1815 km (1120 miles) W of BEIJING, Beijing, China
  • Location Uncertainty: horizontal +/- 8.1 km (5.0 miles); depth fixed by location program
  • Parameters: NST= 79, Nph= 79, Dmin=>999 km, Rmss=0.92 sec, Gp= 94°, M-type=teleseismic moment magnitude (Mw), Version=7
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2009kwaf

Historic Seismicity (Magnitude 7+ since 1900)

qinghai seismic hist
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

In November 2008, a mainshock measuring 6.3 Mw struck Da Qaidam area, followed by a swarm of aftershocks with the three largest shocks measuring 5.4, 5.2 and 5Mw.

Related Links:

Posted in China earthquake, earthquake report, Earthquakes, seismic activity report, Seismic event, Seismic Hazard | Tagged: , , , , , | 5 Comments »