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Posts Tagged ‘Induced Seismicity’

Earthquakes Strike Azerbaijan, Japan Region, Kuril Islands, Montana

Posted by feww on June 13, 2016

Significant aftershock strikes Kumamoto, Japan

Measuring 4/7 on the local intensity scale, the very shallow aftershock struck at 32.5N, 130.7E (13 Jun 2016 15:54 JST ). 

Other Significant Seismicity in Japan Region

  • M4.7 about 176km SSE of Naze, Japan 2016-06-13 10:44:10 UTC depth=10.0km
  • M5.3 about 178km SSE of Naze, Japan 2016-06-13 04:27:04 UTC depth=10.0km
  • M5.7 about 163km SSE of Naze, Japan 2016-06-13 04:21:43 UTC depth=10.0km

Kuril Islands

  • M5.3 about 93km E of Shikotan, Russia 2016-06-12 17:11:38 UTC depth=33.7km

Montana

  • M4.3 about 52km W of West Yellowstone, Montana 2016-06-13 12:14:39 UTC depth=9.9km

Azerbaijan

M4.0 – Caspian Sea, 53.0 km ENE of Astara, Azerbaijan 2016-06-12 at 16:48:37 (UTC) depth=10.0km

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M4.5 Quake Sends Strong Tremors to Medford, Oklahoma

Posted by feww on November 30, 2015

Earthquake strikes WSW of Medford, Oklahoma

Centered at 36.746°N, 98.015°W the quake occurred at a [signature] depth of 5.0 km, reported USGS/EHP.

EQ Details

Magnitude: 4.5Mw
Location: 36.746°N, 98.015°W; depth=5.0 km (3.1 mi)
Time: 2015-11-30 09:49:13 (UTC)
Nearby Cities

  • 26km (16mi) WSW of Medford, Oklahoma
  • 40km (25mi) NNW of Enid
  • 83km (52mi) W of Ponca City
  • 93km (58mi) WSW of Arkansas City, Kansas
  • 148km (92mi) NNW of Oklahoma City

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M4.7 Quake Rattles Cherokee, Oklahoma

Posted by feww on November 19, 2015

Another significant earthquake strikes Oklahoma

Centered at 36.661°N, 98.461°W the quake occurred at a depth of 6.2 km (3.9 mi), reported USGS/EHP.

EQ Details

Magnitude: 4.7Mw
Location: 36.661°N, 98.461°W
Depth: 6.2km (3.9 mi)
Time: 2015-11-19 07:42:12(UTC)
Nearby Cities

  • 13km (8mi) SW of Cherokee, Oklahoma
  • 59km (37mi) WNW of Enid, Oklahoma
  • 86km (53mi) ENE of Woodward, Oklahoma
  • 157km (98mi) NNW of Oklahoma City, Oklahoma

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Shallow Quake Rattles Cushing, Oklahoma

Posted by feww on October 11, 2015

Induced Seismicity: M4.5 EQ Strikes 5km WNW of Cushing, Oklahoma

Centered at 36.008°N, 96.819°W, 86km NE of Oklahoma City, the quake struck at a depth of about 2.0 km, reported USGS/EHP.

At least 9 quakes have struck Oklahoma State in the 18-hr period since  a magnitude 4.4 quake occurred about 18km SW of Medford, Oklahoma at 09:20:43 UTC on 2015-10-10.

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Earthquake Strikes N of Irving, Texas

Posted by feww on May 19, 2015

Shallow earthquake rattles residential area north of Irving, Texas

Centered at32.868°N, 96.957°W the quake occurred at a [signature] depth of 5km, USGS/EHP reported.

EQ Details
Magnitude: 3.3Mw
Location: 32.868°N, 96.957°W depth=5.0 km (3.1 mi)
Time: 2015-05-18 18:14:29 (UTC)
Nearby Cities:

  • 6km (4mi) N of Irving, Texas
  • 8km (5mi) SW of Farmers Branch, Texas
  • 11km (7mi) SSW of Carrollton, Texas
  • 17km (11mi) NNW of Dallas, Texas
  • 292km (181mi) S of Oklahoma City, Oklahoma

Abbott Signs “Denton Fracking Bill”

Texas Gov. Greg Abbott has signed legislation that would preempt local authorities to regulate fracking  and a wide variety of oil and gas-related activities, preventing environmentally harmful oil and natural gas production.

Voters in Denton, a university town near Dallas, banned hydraulic fracturing (fracking) in the area in November 2014.

Abbott said, Texas needs to avoid a “patchwork of local regulations” that threaten oil and gas production.

House Bill 40 does a “profound job of protecting private property rights,” said Abbott.

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Hundreds Injured after Strong Earthquake in Iran

Posted by feww on August 18, 2014

SEISMIC HAZARD
HEIGHTENED GLOBAL SEISMICITY
SCENARIOS 08, 07
.

M6.2 Quake Strikes Western Iran

 Centered at 32.739°N, 47.670°E the quake occurred at a depth of about 10.0km (6.2mi), said USGS/EHP.

The mainshock was preceded by a M5.0 foreshock, and followed by at least 8 significant aftershocks, the largest of which measured 5.8Mw as of posting.

The quakes struck western Iran, near the border with Iraq. Induced seismicity cannot be ruled out.

The quake has injured hundreds of people and caused extensive damage to buildings in the nearby town of Mour-Mouri, said news agencies quoting local media.

Iran quake 18-8-2014
EQ Location Map. Source: USGS/EHP

Earthquake Details
Magnitude: 6.2Mw
Event Time: 2014-08-18 02:32:05 UTC
Location: 32.659°N 47.715°E depth=10.0km (6.2mi)
Nearby Cities:

  • 36km (22mi) SE of Abdanan, Iran
  • 37km (23mi) E of Dehloran, Iran
  • 78km (48mi) WNW of Dezful, Iran
  • 81km (50mi) NW of Shush, Iran
  • 312km (194mi) ESE of Baghdad, Iraq

IMPORTANT NOTICE: FIRE-EARTH Earthquake Forecasts

For detailed earthquake forecasts tune into FIRE-EARTH Reports daily @ 06:32UTC.


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Deadly Quake Strikes South Africa

Posted by feww on August 5, 2014

DEADLY EARTHQUAKE
INDUCED SEISMICITY
SCENARIOS 222, 08
.

M5.3 Strikes Near Orkney, South Africa

Centered at 26.986°S, 26.741°E the rare quake struck at a depth of about 10.0km (6.2mi), said USGS/EHP.

The epicenter was located about 125 km (73 miles) southwest of Johannesburg, and 199km (124mi) SW of Pretoria, South Africa. The quake, which killed at least one person, is said to be the largest in the southern Africa region since 2006, when a magnitude 7.0 shock occurred in  Zimbabwe, according to Geological Survey of South Africa.

Induced Seismicity

There is increasing evidence that some earthquakes are  triggered or caused by human activities. Although the area around JHB is not prone to seismicity, it is plagued by the deepest gold mines in the world.


IMPORTANT NOTICE: FIRE-EARTH EQ Forecast.  For detailed FIRE-EARTH Earthquake Forecasts tune into FIRE-EARTH Reports daily @ 06:32UTC.


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U.S. Earthquakes 24 Hrs

Posted by feww on December 31, 2013

U.S. Earthquakes  24 Hrs to 02:30UTC – December 31, 2013

Of the 28 earthquakes measuring magnitude 2.5+ that have occurred globally in the past 24 hours, 6 have struck the Lower 48, including 2 in Oklahoma, as of posting.

Of the 171 earthquakes (all magnitudes) that have struck the globe in the past 24 hours, 102 have occurred in the Contiguous U.S., mostly in California, 39 in Alaska and 3 in Hawaii, as of posting, with the most significant quake measuring 3.7Mw, striking 4km SSW of Idyllwild, California at a depth of 19.4km (Also M3.8 event occurred 35km SW of Anchor Point, Alaska at a depth of 83.2km). Source: USGS/EHP.

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Significant Earthquakes Strike Oklahoma

Posted by feww on December 29, 2013

9 Percent of the day’s global seismicity occurred in Oklahoma, 17 percent in Lower 48!!

M4.1 earthquakes strikes near Langston, Oklahoma

The quake was centered at 35.896°N, 97.306°W and struck at a depth of about 5.0km (3.1mi). 

Earthquake Details

  • Magnitude: 4.1Mw
  • Event Time: 2013-12-29 08:14:36 UTC
  • Location: 35.896°N 97.306°W depth=5.0km (3.1mi)
  • Nearby Cities:
    • 7km (4mi) SW of Langston, Oklahoma
    • 10km (6mi) E of Guthrie, Oklahoma
    • 31km (19mi) NNE of Edmond, Oklahoma
    • 33km (21mi) SW of Stillwater, Oklahoma
    • 51km (32mi) NNE of Oklahoma City, Oklahoma

Olahoma eq locmap
Oklahoma Earthquakes Location Map.

The event followed two smaller earthquakes measuring

  • M3.4  (Location 36.870°N 97.622°W depth=4.3km; 155km N of Oklahoma City) and
  • M3.1 (36.141°N 97.329°W depth=5.0km; 76km NNE of Oklahoma City).

30 day EQs in Oklahoma and Texas
30 Days, Magnitude 2.5+ Earthquakes in Texas, Oklahoma and Kansas. 40 Earthquakes in the map area. Global map includes 1012 earthquakes – Updated: 2013-12-29 10:06:05UTC. Source: USGS/EHP

About 17  percent of the global seismicity in the past 30 days, in terms of number of events measuring M2.5+, occurred in or near contiguous United States.

Oklahoma Earthquakes in November

At least 41 earthquakes measuring 2.5Mw or greater struck the state of Oklahoma in November 2013, according to data provided by USGS/EHP.

The largest shock in the cluster (No. 11 on the table below) measured 3.8Mw, striking at a depth of 5.9km on November 11, 2013 some 5km WNW of Jones, Oklahoma.

ok quakes nov2013-s
List of Oklahoma Earthquakes measuring 2.5Mw or greater, November 2013.

Tectonic Summary [USGS/EHP]

Induced Seismicity. As is the case elsewhere in the world, there is evidence that some central and eastern North America earthquakes have been triggered or caused by human activities that have altered the stress conditions in earth’s crust sufficiently to induce faulting. Activities that have induced felt earthquakes in some geologic environments have included impoundment of water behind dams, injection of fluid into the earth’s crust, extraction of fluid or gas, and removal of rock in mining or quarrying operations. In much of eastern and central North America, the number of earthquakes suspected of having been induced is much smaller than the number of natural earthquakes, but in some regions, such as the south-central states of the U.S., a significant majority of recent earthquakes are thought by many seismologists to have been human-induced. Even within areas with many human-induced earthquakes, however, the activity that seems to induce seismicity at one location may be taking place at many other locations without inducing felt earthquakes. In addition, regions with frequent induced earthquakes may also be subject to damaging earthquakes that would have occurred independently of human activity. Making a strong scientific case for a causative link between a particular human activity and a particular sequence of earthquakes typically involves special studies devoted specifically to the question. Such investigations usually address the process by which the suspected triggering activity might have significantly altered stresses in the bedrock at the earthquake source, and they commonly address the ways in which the characteristics of the suspected human-triggered earthquakes differ from the characteristics of natural earthquakes in the region.

one-day quakes worldwide 28-29 december 13
Earthquake Location Map. 1 Day, Magnitude 2.5+ Earthquakes Worldwide. 34 earthquakes shown on the map, updated at 2013-12-29 09:49:36 UTC. Source: USGS/EHP

M5.8 Quake Strikes Off the Coast of Turkey

  • Event Time:2013-12-28 15:21:05 UTC
  • Location: 35.980°N 31.340°E depth=51.1km (31.7mi)
  • Nearby Cities
    • 80km (50mi) SSW of Avsallar, Turkey
    • 204km (127mi) WNW of Nicosia, Cyprus

Tectonic Summary: Seismotectonics of the Mediterranean Region and Vicinity

The Mediterranean region is seismically active due to the northward convergence (4-10 mm/yr) of the African plate with respect to the Eurasian plate along a complex plate boundary. This convergence began approximately 50 Ma and was associated with the closure of the Tethys Sea. The modern day remnant of the Tethys Sea is the Mediterranean Sea. The highest rates of seismicity in the Mediterranean region are found along the Hellenic subduction zone of southern Greece, along the North Anatolian Fault Zone of western Turkey and the Calabrian subduction zone of southern Italy. Local high rates of convergence at the Hellenic subduction zone (35mm/yr) are associated with back-arc spreading throughout Greece and western Turkey above the subducting Mediterranean oceanic crust.

 
The region of the Marmara Sea is a transition zone between this extensional regime, to the west, and the strike-slip regime of the North Anatolian Fault Zone, to the east. The North Anatolian Fault accommodates much of the right-lateral horizontal motion (23-24 mm/yr) between the Anatolian micro-plate and Eurasian plate as the Anatolian micro-plate is being pushed westward to further accommodate closure of the Mediterranean basin caused by the collision of the African and Arabian plates in southeastern Turkey. Subduction of the Mediterranean Sea floor beneath the Tyrrhenian Sea at the Calabrian subduction zone causes a significant zone of seismicity around Sicily and southern Italy. Active volcanoes are located above intermediate depth earthquakes in the Cyclades of the Aegean Sea and in southern Italy.

In the Mediterranean region there is a written record, several centuries long, documenting pre-instrumental seismicity (pre-20th century). Earthquakes have historically caused widespread damage across central and southern Greece, Cyprus, Sicily, Crete, the Nile Delta, Northern Libya, the Atlas Mountains of North Africa and the Iberian Peninsula. The 1903 M8.2 Kythera earthquake and the 1926 M7.8 Rhodes earthquakes are the largest instrumentally recorded Mediterranean earthquakes, both of which are associated with subduction zone tectonics. Between 1939 and 1999 a series of devastating M7+ strike-slip earthquakes propagated westward along the North Anatolian Fault Zone, beginning with the 1939 M7.8 Erzincan earthquake on the eastern end of the North Anatolian Fault system. The 1999 M7.6 Izmit earthquake, located on the westward end of the fault, struck one of Turkey’s most densely populated and industrialized urban areas killing, more than 17,000 people. Although seismicity rates are comparatively low along the northern margin of the African continent, large destructive earthquakes have been recorded and reported from Morocco in the western Mediterranean, to the Dead Sea in the eastern Mediterranean. The 1980 M7.3 El Asnam earthquake was one of Africa’s largest and most destructive earthquakes within the 20th century.

Large earthquakes throughout the Mediterranean region have also been known to produce significant and damaging tsunamis. One of the more prominent historical earthquakes within the region is the Lisbon earthquake of November 1, 1755, whose magnitude has been estimated from non-instrumental data to be about 8.0. The 1755 Lisbon earthquake is thought to have occurred within or near the Azores-Gibraltar transform fault, which defines the boundary between the African and Eurasian plates off the west coast of Morocco and Portugal. The earthquake is notable for both a large death toll of approximately 60,000 people and for generating a tsunami that swept up the Portuguese coast inundating coastal villages and Lisbon. An earthquake of approximately M8.0 near Sicily in 1693 generated a large tsunami wave that destroyed numerous towns along Sicily’s east coast. The M7.2 December 28, 1908 Messina earthquake is the deadliest documented European earthquake. The combination of severe ground shaking and a local tsunami caused an estimated 60,000 to 120,000 fatalities.  [Source:USGS National Earthquake Information Center.]

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Shallow Quakes Continue to Rattle AL, OK, TX, WY, WA, MT, NV, CA

Posted by feww on December 9, 2013

Another shallow quake strikes near Mineral Wells, Texas

An earthquake measuring 3.7Mw rattled Mineral Wells , Texas on Monday.

Centered at 32.957°N, 98.061°W, the quake struck at a depth of 5.0km (3.1mi) on Monday at 09:23UTC, reported USGS/EHP.

The epicenter was located about 48km (30mi) W of Azle, Texas, and 282km  S of Oklahoma City, Oklahoma.

Earthquake Location Map

 

google logo of the day 2
30-day 2-5mw-s
Map of earthquakes measuring 2.5Mw greater during the past 30 Days. Source: USGS/EHP

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M3.6 Quake Strikes Azle, Texas

Posted by feww on December 9, 2013

Shallow earthquake measuring 3.6Mw strikes 3km NW of Azle, Texas

The event was  the latest of more than two dozen quakes to strike the region since early November.

Earthquake Details [USGS/EHP]
Magnitude: 3.6Mw
Depth: 5.0km
Location: 32.915°N 97.577°W
Time: 2013-12-08 06:10:03 UTC
Nearby Cities:

  • 3km (2mi) NW of Azle, Texas
  • 20km (12mi) WNW of Saginaw, Texas
  • 20km (12mi) NNW of White Settlement, Texas
  • 26km (16mi) NE of Weatherford, Texas
  • 283km (176mi) S of Oklahoma City, Oklahoma

Earthquake Location Map

google logo of the day 2

texas quake 8-12-13
Source: USGS/EHP

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M4.5 Quake Strikes NE Edmond Oil and Gas Field, Oklahoma

Posted by feww on December 8, 2013

Significant Earthquake Strikes 11km ENE of Edmond, Oklahoma

A magnitude 4.5Mw earthquake struck within NE Edmond Oil and Gas Field at a shallow depth of 5km, at 18:10 UTC2 on December 07, 2013. The quake was followed by a small cluster of aftershocks, with the largest two measuring 3.1Mw, as of posting.

Earthquake Details

Magnitude: 4.5Mw
Event Time: 2013-12-07 18:10:23 UTC
Location: 35.680°N, 97.355°W
Depth: 5.0km (3.1mi)
Nearby Cities:

  • 11km (7mi) ENE of Edmond, Oklahoma
  • 21km (13mi) NNW of Choctaw, Oklahoma
  • 23km (14mi) SSE of Guthrie, Oklahoma
  • 25km (16mi) N of Midwest City, Oklahoma
  • 27km (17mi) NNE of Oklahoma City, Oklahoma

Source: USGS/EHP

Latest Oklahoma Earthquakes

  1. M3.1 8km N of Spencer, Oklahoma 2013-12-08 15:27:33 UTC+09:00 5.0 km
  2. M3.1 7km E of The Village, Oklahoma 2013-12-08 08:58:19 UTC+09:00 8.9 km
  3. M2.8 6km SE of Edmond, Oklahoma 2013-12-08 04:26:29 UTC+09:00 5.0 km
  4. M4.5 11km ENE of Edmond, Oklahoma 2013-12-08 03:10:23 UTC+09:00 5.0 km

Oklahoma Quakes - 8dec2013 - 4
Earthquake Location Map. Source: USGS/EHP

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41 Earthquakes Strike Oklahoma in November

Posted by feww on December 1, 2013

A large cluster of small but shallow quakes rattles Oklahoma City in November

At least 41 earthquakes measuring 2.5Mw or greater struck the state of Oklahoma in November 2013, according to data provided by USGS/EHP.

The largest shock in the cluster (No. 11 on the table below) measured 3.8Mw, striking at a depth of 5.9km on November 11, 2013 some 5km WNW of Jones, Oklahoma.

  • The average depth of the November quakes was 5.3km.

Oklahoma Quakes - Nov 2013
Map of earthquakes in Oklahoma – Nov 2013. Source: USGS/EHP. Map Enhanced by FIRE-EARTH Blog.

google logo of the day 2

List of Oklahoma Earthquakes measuring 2.5Mw or greater, November 2013.

ok quakes nov2013-s

The following information is mirrored from USGS Site.

Tectonic Summary

Earthquakes in the Stable Continental Region

Natural Occurring Earthquake Activity

Most of North America east of the Rocky Mountains has infrequent earthquakes. Here and there earthquakes are more numerous, for example in the New Madrid seismic zone centered on southeastern Missouri, in the Charlevoix-Kamouraska seismic zone of eastern Quebec, in New England, in the New York – Philadelphia – Wilmington urban corridor, and elsewhere. However, most of the enormous region from the Rockies to the Atlantic can go years without an earthquake large enough to be felt, and several U.S. states have never reported a damaging earthquake. […]

Induced Seismicity

As is the case elsewhere in the world, there is evidence that some central and eastern North America earthquakes have been triggered or caused by human activities that have altered the stress conditions in earth’s crust sufficiently to induce faulting. Activities that have induced felt earthquakes in some geologic environments have included

  • Impoundment of water behind dams,
  • Injection of fluid into the earth’s crust,
  • Extraction of fluid or gas, and
  • Removal of rock in mining or quarrying operations.

In much of eastern and central North America, the number of earthquakes suspected of having been induced is much smaller than the number of natural earthquakes, but in some regions, such as the south-central states of the U.S., a significant majority of recent earthquakes are thought by many seismologists to have been human-induced.  […]

Latest Significant Quakes  (US and Global)

M5.5 – 221km W of Brookings, Oregon 2013-12-01 03:19:37 UTC
Location: 41.652°N 126.891°W depth=10.0km (6.2mi)
Nearby Cities:
+ 246km (153mi) WNW of McKinleyville, California
+ 481km (299mi) SW of Salem, Oregon

M6.4 – Kepulauan Barat Daya, Indonesia 2013-12-01 01:24:13 UTC
Location: 7.014°S 128.376°E depth=10.0km (6.2mi)
Nearby Cities:
+ 340km (211mi) WNW of Saumlaki, Indonesia
+ 353km (219mi) ENE of Dili, East Timor

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Earthquake No. 19 Strikes N. Texas

Posted by feww on November 29, 2013

STAY TUNED for Important Announcements Concerning the State of Texas Starting Late 2014

M3.1 Strikes near Reno, Texas

Earthquakes in the Stable Continental Region

A magnitude 3.1 earthquake, the 19 to strike northern Texas in the past 24 days,  occurred at 06:39 UTC November 29, 2013 .

  • Magnitude: 3.1Mw
  • Event Time: 2013-11-29 06:14:10 UTC [2013-11-29 00:14:10 UTC-06:00 at epicenter]
  • Location: 32.899°N 97.626°W
  • Depth: 5.0km (3.1mi)
  • Nearby Cities
    • 6km (4mi) SW of Reno, Texas
    • 7km (4mi) W of Azle, Texas
    • 22km (14mi) NE of Weatherford, Texas
    • 22km (14mi) NW of White Settlement, Texas
    • 285km (177mi) S of Oklahoma City, Oklahoma

Texas and Oklahoma quakes
Texas and Oklahoma Earthquakes Location Map. Source: USGS/EHP

EQ 19 northern TexasTexas Earthquakes Location Map. Source: USGS/EHP

n-texas quakes nov 2013
List of Texas Earthquakes measuring 2.5Mw or greater since November 6, 2013 [Excludes No. 19, listed above.]  Source: USGS/EHP – Prepared by FIRE-EARTH Blog – Nov. 29, 2013.

google logo of the day 2

Induced Seismicity

As is the case elsewhere in the world, there is evidence that some central and eastern North America earthquakes have been triggered or caused by human activities that have altered the stress conditions in earth’s crust sufficiently to induce faulting. Activities that have induced felt earthquakes in some geologic environments have included

    • Impoundment of water behind dams
    • Injection of fluid into the earth’s crust,
    • Extraction of fluid or gas, and
    • Removal of rock in mining or quarrying operations.

In much of eastern and central North America, the number of earthquakes suspected of having been induced is much smaller than the number of natural earthquakes, but in some regions, such as the south-central states of the U.S., a significant majority of recent earthquakes are thought by many seismologists to have been human-induced. Even within areas with many human-induced earthquakes, however, the activity that seems to induce seismicity at one location may be taking place at many other locations without inducing felt earthquakes. In addition, regions with frequent induced earthquakes may also be subject to damaging earthquakes that would have occurred independently of human activity. […] —USGS

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