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Posts Tagged ‘LA Quake’

Moderate Quake Strikes LA

Posted by feww on May 18, 2009

Magnitude 5.0 earthquake strikes Greater Los Angeles Area, Calif.

The main shock was followed by a swarm of aftershocks including a magnitude 3.1. More tremors should be expected in the area in the coming days.

Earthquake Details
Magnitude: 5.0

  • Monday, May 18, 2009 at 03:39:36 UTC
  • Sunday, May 17, 2009 at 08:39:36 PM at epicenter

Location of Epicenter

ci10410337 - 1
10-degree Map Centered at 35°N,120°W – USGS

Location:  33.940°N, 118.338°W
Depth:  13.5 km (8.4 miles)

  • 2 km (1 miles) E (91°) from Lennox, CA
  • 2 km (1 miles) SSE (159°) from Inglewood, CA
  • 3 km (2 miles) NNE (22°) from Hawthorne, CA
  • 15 km (10 miles) SSW (213°) from Los Angeles Civic Center, CA

Location Uncertainty:  horizontal +/- 0.4 km (0.2 miles); depth +/- 0.9 km (0.6 miles)
Parameters:  Nph=139, Dmin=7 km, Rmss=0.42 sec, Gp= 40°,
M-type=local magnitude (ML), Version=C

Source: California Integrated Seismic Net/ USGS Caltech CGS UCB UCSD UNR

Event ID: ci10410337

Historical Seismicity

ci10410337 - 2

ci10410337 - 3

ci10410337 - 4
Overall, the population in this region resides in structures that are resistant to earthquake shaking, though some vulnerable structures exist. A magnitude 5.2 earthquake occurred near the Whittier Narrows, California, region 21 km northeast of the location of this earthquake on October 4, 1987 (UTC), with estimated population exposures of 477,000 at intensity VII and 2,994,000 at intensity VI, resulting in an estimated 1 fatality. On January 17, 1994 (UTC), a magnitude 6.7 earthquake occurred near the Northridge, California, region 32 km northwest of the location of this earthquake, with estimated population exposures of 73,000 at intensity IX or greater and 2,181,000 at intensity VIII, resulting in an estimated 33 fatalities. Recent earthquakes in this area have caused, landslides and liquefaction that may have contributed to losses. [Source: USGS – Earthquake Hazard Program]

Related Links:

Posted in Hawthorne quake, Inglewood, LA aftershocks, Lennox, socal earthquake | Tagged: , , , , | 1 Comment »

Magnitude 5.4 Quake Hits Los Angeles Area

Posted by feww on July 29, 2008

“A Conspiracy Against the Public”: For reasons unknown to Moderators, Google has blocked this post.

A Magnitude 5.4 Earthquake Struck Greater Los Angeles Area, California

Earthquake Details [Source: USGS]

Magnitude: 5.4

  • Tuesday, July 29, 2008 at 18:42:15 UTC
  • Tuesday, July 29, 2008 at 11:42:15 AM at epicenter

Location: 33.955°N, 117.765°W
13.6 km (8.5 miles)

  • 4 km (3 miles) WSW (240°) from Chino Hills, CA
  • 7 km (4 miles) SE (135°) from Diamond Bar, CA
  • 8 km (5 miles) NNE (16°) from Yorba Linda, CA
  • 12 km (7 miles) S (184°) from Pomona, CA
  • 46 km (28 miles) ESE (104°) from Los Angeles Civic Center, CA

Location Uncertainty: horizontal +/- 0.3 km (0.2 miles); depth +/- 0.6 km (0.4 miles)

Damage Reports

There are reports of a few injuries and minor damage in the area. The two nuclear plants in the area, San Onofre nuclear station, between Los Angeles and San Diego, and the Diablo Canyon plant, northeast of Los Angeles, seem to have been spared, according to utility officials.

A worker cleans up shattered glass at Pomona City Hall. July 29, 2008 – Photo (Irfan Khan / Los Angeles Times). Image may be subject to copyright. See FEWW Fair Use Notice!

Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver

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