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Archive for the ‘earthquakes 2011’ Category

Santiago Earthquake Alert

Posted by feww on July 7, 2011

Large earthquake could strike Santiago region, Chile

FIRE-EARTH models show that a large earthquake measuring ≥8.8Mw could strike Santiago region, Chile.

Earthquake Forecast Details

  • Magnitude: ≥8.8Mw
  • Location: About 60 km west of Santiago, Chile
  • Expected Time of Occurrence: 2011/ early 2012
  • Probability: ~ 0.7

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Powerful Quake Strikes Kermadec Islands

Posted by feww on July 7, 2011

Magnitude 7.6 EQ Strikes E of Raoul Island, Kermadec Islands

The quake which struck at a depth of 20km was followed by several significant aftershocks.

10-degree Map Centered at 30°S,175°W


Earthquake Location Map. Source: USGS-EHP. Map enhanced by FIRE-EARTH.

Earthquake Details

  • Magnitude: 7.6
  • Date-Time: Wednesday, July 06, 2011 at 19:03:16 UTC
  • Location: 29.312°S, 176.204°W
  • Depth: 20 km (12.4 miles)
  • Region: KERMADEC ISLANDS REGION
  • Distances:
    • 163 km (101 miles) E of Raoul Island, Kermadec Islands
    • 347 km (215 miles) NE of L’Esperance Rock, Kermadec Islands
    • 913 km (567 miles) S of NUKU`ALOFA, Tonga
    • 1185 km (736 miles) NE of Auckland, New Zealand
  • Location Uncertainty: horizontal +/- 14.1 km (8.8 miles); depth +/- 4.4 km (2.7 miles)
  • Source: USGS NEIC (WDCS-D)

Tsunami Evaluation 

ISSUED by PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS
AT 19:59UTC 06 JUL 2011

SEA LEVEL READINGS INDICATE A TSUNAMI WAS GENERATED. IT MAY HAVE BEEN DESTRUCTIVE ALONG COASTS NEAR THE EARTHQUAKE EPICENTER. FOR THOSE AREAS – WHEN NO MAJOR WAVES ARE OBSERVED FOR TWO HOURS AFTER THE ESTIMATED TIME OF ARRIVAL OR DAMAGING WAVES HAVE NOT OCCURRED FOR AT LEAST TWO HOURS THEN LOCAL AUTHORITIES CAN ASSUME THE THREAT IS PASSED. DANGER TO BOATS AND COASTAL STRUCTURES CAN CONTINUE FOR SEVERAL HOURS DUE TO RAPID CURRENTS. AS LOCAL CONDITIONS CAN CAUSE A WIDE VARIATION IN TSUNAMI WAVE ACTION THE ALL CLEAR DETERMINATION MUST BE MADE BY LOCAL AUTHORITIES.

NO TSUNAMI THREAT EXISTS FOR OTHER COASTAL AREAS IN THE PACIFIC ALTHOUGH SOME OTHER AREAS MAY EXPERIENCE SMALL SEA LEVEL CHANGES. THE TSUNAMI WARNING IS NOW CANCELLED FOR ALL AREAS COVERED BY THIS CENTER.

Tsunami Wave Amplitude

“The largest wave we saw was a peak to peak amplitude of 1.9 meters which, looking at the sea surface, would be like a one meter rise. That wave was at Raoul Island very close to the earthquake and just to the west of the epicenter,” according to a spokesman at the Pacific Tsunami Warning Center.

“Further away from the quake it is very small to no tsunami. Based on that information it was clear that it was very small and we cancelled [the tsunami warning.]”

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Strong Quake Strikes N Coast of Papua, Indonesia

Posted by feww on June 26, 2011

Magnitude 6.4 EQ Strikes 172 km N of Enarotali, Papua, Indonesia

Three major earthquakes have struck the region within 330km radius of the epicenter since 1914, including the largest two in the last 40 years (8.1Mw on 10 Jan 1979, and 8.2Mw on 17 Feb 1996).

10-degree Map Centered at 0°N,135°E

EQ Location Map. Source: USGS-EHP. Map enhanced by FIRE-EARTH.

Earthquake Details

  • Magnitude: 6.4Mw
  • Date-Time:
    • Sunday, June 26, 2011 at 12:16:41 UTC
    • Sunday, June 26, 2011 at 09:16:41 PM at epicenter
  • Location: 2.389°S, 136.648°E
  • Depth: 36.1 km (22.4 miles)
  • Region: NEAR THE NORTH COAST OF PAPUA, INDONESIA
  • Distances: 172 km (106 miles) N of Enarotali, Papua, Indonesia
    • 331 km (205 miles) ESE of Manokwari, Papua, Indonesia
    • 1,286 km (799 miles) NNE of DARWIN, Northern Territory, Australia
    • 3,336 km (2072 miles) E of JAKARTA, Java, Indonesia
  • Location Uncertainty:
    • horizontal +/- 14.6 km (9.1 miles);
    • depth +/- 12.2 km (7.6 miles)
  • Source:USGS NEIC (WDCS-D)
  • Event ID: usc0004gyw

Historic Seismicity [Mag ≥ 7.0 since 1900]


Source: USGS-EHP

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Powerful Quake Hits Fox Islands, Alaska

Posted by feww on June 24, 2011

UPDATE at 04:25UTC: The West Coast and Alaska Tsunami Warning Center has now lifted the Tsunami Warning that was issued earlier.

Magnitude 7.4 Quake Strikes 64 km (39 miles) SW of Amukta Island, Alaska

The quake has since been downgraded to magnitude 7.2Mw, but a Tsunami Warning issued by the West Coast and Alaska Tsunami Warning Center is still in place, as of posting:

The Tsunami Warning continues in effect for the coastal areas of Alaska from Unimak Pass, Alaska (80 miles NE of Dutch Harbor) to Amchitka Pass, Alaska (125 miles W of Adak).

This message is for Information Only for coastal areas of California, Oregon, Washington, British Columbia and Alaska from the California-Mexico border to Unimak Pass, Alaska (80 miles NE of Dutch Harbor).

This message is for Information Only for coastal areas of Alaska from Amchitka Pass, Alaska (125 miles W of Adak) to Attu, Alaska.

This message is for Information Only for coastal areas of Alaska from Amchitka Pass, Alaska (125 miles W of Adak) to Attu, Alaska.

The Pacific Tsunami Warning Center issued the following bulletin:

BASED ON ALL AVAILABLE DATA A DESTRUCTIVE PACIFIC-WIDE TSUNAMI IS
NOT EXPECTED AND THERE IS NO TSUNAMI THREAT TO HAWAII. REPEAT. A
DESTRUCTIVE PACIFIC-WIDE TSUNAMI IS NOT EXPECTED AND THERE IS NO
TSUNAMI THREAT TO HAWAII.

10-degree Map Centered at 50°N,170°W

Source: USGS-EHP

Earthquake Details

  • Magnitude: 7.2
  • Date-Time:
    • Friday, June 24, 2011 at 03:09:40 UTC
    • Thursday, June 23, 2011 at 06:09:40 PM at epicenter
  • Location: 52.008°N, 171.859°W
  • Depth: 62.6 km (38.9 miles)
  • Region: FOX ISLANDS, ALEUTIAN ISLANDS, ALASKA
  • Distances:
    • 64 km (39 miles) SW of Amukta Island, Alaska
    • 103 km (64 miles) SW of Yunaska Island, Alaska
    • 1,677 km (1,042 miles) WSW of Anchorage, Alaska
    • 2,429 km (1,509 miles) W of WHITEHORSE, Yukon Territory, Canada
  • Location Uncertainty:
    • horizontal +/- 13.8 km (8.6 miles)
    • depth +/- 5.3 km (3.3 miles)
  • Source: USGS NEIC (WDCS-D)

Alaska EQ Info Center


Click images to enlarge. For interactive images go to source: Alaska EQ Info Center

In Global Tectonics Warning – April 27 posted on April 27, 2011, FIRE-EARTH said:

FIRE-EARTH Model shows NEAR CRITICAL buildup of tectonic stress energy near the coast of Alaska.

UPDATE

FIRE-EARTH Models show the energy buildup continuing …

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Magnitude 6.5 Quake Strikes Northern Chile

Posted by feww on June 21, 2011

Strong Earthquake Measuring 6.5Mw Shakes Calama, Antofagasta, Chile

The quake was epicentered at  21.681°S, 68.187°W and struck at a depth of about 113 km, shaking the country’s mining heartland near the border with Bolivia, on Monday June 20, 2011 at 16:35:59 UTC.

The earthquake was too deep and far from the coastal areas to cause a tsunami. There were no reports of damage or casualty as of posting.

EQ Details

  • F-E Region: Chile-Bolivia Border Region
  • Magnitude: 6.5Mw
  • Time: 2011-06-20 16:35:59.4 UTC
  • Magnitude: 6.5 (Mw)
  • Epicenter: 68.42°W 21.84°S
  • Depth: 113 km
  • Status: M – manually revised
  • Source: GFZ Potsdam – Earthquake Bulletin

10-degree Map Centered at 20°S,70°W


EQ Location Map. Source: USGS-EHP. Enhanced by FIRE-EARTH

Distances [Source: USGS NEIC -WDCS-D]

  • 87 km (54 miles) NE of Calama, Antofagasta, Chile
  • 196 km (121 miles) E of Tocopilla, Antofagasta, Chile
  • 224 km (139 miles) SW of Uyuni, Bolivia
  • 1,297 km (805 miles) N of SANTIAGO, Region Metropolitana, Chile

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