Thursday, April 23, 2009

Earthquakes: Greater Los Angeles area earthquake swarm - 2.5, 3.8, 3.0 and 4.0

Earthquake swarm is centered 1 km ( 1 mi) NNW of Yorba Linda, CA

M 2.5, Greater Los Angeles area, California
Thursday, April 23, 2009 9:04 PM
GPS Location: 33.909°N 117.778°W
Friday, April 24, 2009 04:04:51 UTC
Time: Thursday, April 23, 2009 09:04:51 PM at epicenter
Depth: 7.10 km (4.41 mi)

M 3.0, Greater Los Angeles area, California
Thursday, April 23, 2009 8:28 PM
GPS Location: 33.906°N 117.776°W
Friday, April 24, 2009 03:28:45 UTC
Time: Thursday, April 23, 2009 08:28:45 PM at epicenter
Depth: 2.30 km (1.43 mi)

M 4.0, Greater Los Angeles area, California
Thursday, April 23, 2009 8:27 PM
GPS Location: 33.910°N 117.768°W
Friday, April 24, 2009 03:27:50 UTC
Time: Thursday, April 23, 2009 08:27:50 PM at epicenter
Depth: 0.00 km (0.00 mi)

M 3.8, Greater Los Angeles area, California
Thursday, April 23, 2009 at 23:56:23 UTC
GPS Location: 33.896°N 117.795°W
Thursday, April 23, 2009 at 23:56:23 UTC
Time: Thursday, April 23, 2009 at 04:56:23 PM at epicenter
Depth:6 km (3.7 miles) (poorly constrained)


Greater Los Angeles area earthquakes - Map
32 minutes ago Map 3.3
4 hours ago Map 4.0

A minor earthquake occurred at 8:28:45 PM (PDT) on Thursday, April 23, 2009.
The magnitude 3.0 event occurred 2 km (2 miles) NNE of Yorba Linda, CA.
The hypocentral depth is 2 km ( 1 mile).


2.5 M Earthquake Details

Magnitude2.5
Date-Time
  • Friday, April 24, 2009 at 04:04:51 UTC
  • Thursday, April 23, 2009 at 09:04:51 PM at epicenter
Location33.909°N, 117.778°W
Depth7.1 km (4.4 miles)
RegionGREATER LOS ANGELES AREA, CALIFORNIA
Distances
  • 3 km (2 miles) NNE (22°) from Yorba Linda, CA
  • 8 km (5 miles) ENE (68°) from Placentia, CA
  • 9 km (6 miles) SW (214°) from Chino Hills, CA
  • 13 km (8 miles) NE (52°) from Anaheim, CA
  • 46 km (29 miles) ESE (111°) from Los Angeles Civic Center, CA
Location Uncertaintyhorizontal +/- 0.3 km (0.2 miles); depth +/- 1.2 km (0.7 miles)
ParametersNph=078, Dmin=9 km, Rmss=0.45 sec, Gp= 36°,
M-type=local magnitude (ML), Version=C
Source
Event IDci10399905


3.0 M Earthquake Details

Magnitude3.0
Date-Time
  • Friday, April 24, 2009 at 03:28:45 UTC
  • Thursday, April 23, 2009 at 08:28:45 PM at epicenter
Location33.906°N, 117.776°W
Depth2.3 km (1.4 miles)
RegionGREATER LOS ANGELES AREA, CALIFORNIA
Distances
  • 2 km (2 miles) NNE (28°) from Yorba Linda, CA
  • 8 km (5 miles) ENE (70°) from Placentia, CA
  • 9 km (6 miles) SSW (212°) from Chino Hills, CA
  • 13 km (8 miles) NE (54°) from Anaheim, CA
  • 46 km (29 miles) ESE (111°) from Los Angeles Civic Center, CA
Location Uncertaintyhorizontal +/- 0.8 km (0.5 miles); depth +/- 1.3 km (0.8 miles)
ParametersNph=020, Dmin=9 km, Rmss=0.3 sec, Gp= 79°,
M-type=(unknown type), Version=S
Source
Event IDci10399897






4.0 M Earthquake Details

Magnitude4.0
Date-Time
  • Friday, April 24, 2009 at 03:27:50 UTC
  • Thursday, April 23, 2009 at 08:27:50 PM at epicenter
Location33.910°N, 117.767°W
Depth0 km (~0 mile) (poorly constrained)
RegionGREATER LOS ANGELES AREA, CALIFORNIA
Distances
  • 3 km (2 miles) NE (36°) from Yorba Linda, CA
  • 8 km (5 miles) SSW (210°) from Chino Hills, CA
  • 9 km (5 miles) ENE (69°) from Placentia, CA
  • 13 km (8 miles) NNE (27°) from Orange, CA
  • 47 km (29 miles) ESE (110°) from Los Angeles Civic Center, CA
Location Uncertaintyhorizontal +/- 0.3 km (0.2 miles); depth +/- 0.6 km (0.4 miles)
ParametersNph=122, Dmin=9 km, Rmss=0.51 sec, Gp= 18°,
M-type=local magnitude (ML), Version=C
Source
Event IDci10399889


Earthquake Details

Magnitude3.8
Date-Time
Location33.896°N, 117.795°W
Depth6 km (3.7 miles) (poorly constrained)
RegionGREATER LOS ANGELES AREA, CALIFORNIA
Distances
  • 1 km (1 miles) NNW (334°) from Yorba Linda, CA
  • 6 km (4 miles) ENE (74°) from Placentia, CA
  • 9 km (6 miles) ESE (109°) from Brea, CA
  • 11 km (7 miles) NE (53°) from Anaheim, CA
  • 11 km (7 miles) SW (217°) from Chino Hills, CA
  • 45 km (28 miles) ESE (113°) from Los Angeles Civic Center, CA
Location Uncertaintyhorizontal +/- 0.3 km (0.2 miles); depth +/- 31.6 km (19.6 miles)
ParametersNph=086, Dmin=8 km, Rmss=0.44 sec, Gp= 36°,
M-type=local magnitude (ML), Version=O
Source
Event IDci10399801

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