Fire Earth

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Posts Tagged ‘North Texas earthquakes’

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.

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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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Two More Quakes Strike North Texas

Posted by feww on November 29, 2013

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

18 Earthquakes strike North Texas in 23 Days

16 of the quakes measure greater than M2.5 with the largest two recorded as magnitude 3.6Mw.

More than 80 minor shocks have occurred in the built-up areas of Johnson, Ellis and Parker counties in the last five years.

In May 2001, after a 3.3Mw shock occurred in Northern Texas, FIRE-EARTH Blog said: Texas quake likely caused by oil and natural gas drilling activities

n-texas quakes locmap
Map of N. Texas Earthquakes – 30 day shocks measuring 2.5 or greater as of November 29, 2013. Source: USGS/EHP

Details of the Latest Events

Event near Jacksboro, Texas

  • Magnitude: 2.8Mw
  • Event Time: 2013-11-28 08:41:07 UTC
  • Location: 33.020°N 98.209°W
  • Depth: 5.0km (3.1mi)
  • Nearby Cities
    • 22km (14mi) SSW of Jacksboro, Texas
    • 25km (16mi) NNW of Mineral Wells, Texas
    • 48km (30mi) NW of Weatherford, Texas
    • 63km (39mi) WNW of Azle, Texas
    • 278km (173mi) SSW of Oklahoma City, Oklahoma

Event N of Mineral Wells, Texas

  • Event Time: 2013-11-28 07:58:36 UTC
  • Location: 32.955°N 98.131°W
  • Depth: 5.0km (3.1mi)
  • Nearby Cities
    • 16km (10mi) N of Mineral Wells, Texas
    • 38km (24mi) NW of Weatherford, Texas
    • 55km (34mi) W of Azle, Texas
    • 66km (41mi) WNW of White Settlement, Texas
    • 284km (176mi) SSW of Oklahoma City, Oklahoma

north texas quakes list - 29nov2013
List of Texas Earthquakes measuring 2.5Mw or greater since November 6, 2013.  Source: USGS/EHP – Prepared by FIRE-EARTH Blog – Nov. 29, 2013.

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Texas and Fracking

Oil and gas drilling rigs are moving ever closer to populated areas in Texas, causing air quality problems for the residents. “Today there are over 12,000 gas wells in the Barnett Shale surrounding the Dallas-Fort Worth area. In addition to the wells, infrastructure such as compressor stations are springing up near the drill sites, adding to air quality problems. In towns like DISH, TX – where 11 high-pressure gas pipelines and their associated compressor stations all converge – residents have reported serious health impacts and severely degraded air quality.” —EarthJustice

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M3.3 Quake Strikes Azle, Texas

Posted by feww on November 25, 2013

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

Shallow quake strikes 7km (4mi) W of Azle, Texas

The quake measuring 3.3Mw, centered at 32.897°N 97.628°W, about 10km ESE (255 degrees) of Pelican Bay, struck at a shallow depth of 5.0km (3.1mi) on Monday at 01:43am local time.

The shock was latest in a series of 16 earthquakes to hit North Texas this month.

More than 80 minor shocks have occurred in the built-up areas of Johnson, Ellis and Parker counties in the last five years.

usb000l63h_ciim
USGS Community Internet Intensity Map – Northern Texas.

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