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Posts Tagged ‘Baja quake’

M7.3 Quake Hits Baja, Kills One

Posted by feww on April 4, 2010

Serial No  1,535. If any posts are blocked in your country, please drop us a line.

California Seismicity Rising

The San Andreas Fault Zone [and extensions] has never before come so close to a violent major fragmentation.

Powerful earthquake measuring up to 7.3Mw strikes Baja California, Mexico, killing at least one

The quake located at 32.128°N, 115.303°W, about 60 km (38 miles) SSE (165°) from Mexicali, Baja California, Mexico, occurred on Sunday, April 04, 2010 at 03:40:40 PM (time at epicenter), and at a depth of about 10km.

As of 00:26UTC at least a dozen aftershocks have struck the area, the largest of which measured 5.8 and 5.7Mw respectively.  Additional shocks will follow.

Large swarms of minor shocks have been occurring in Guadalupe Victoria over the last month or so.

The earthquake shook building in San Diego, Phoenix, AZ, and Downtown Los Angeles, some 320km (~ 200 miles) northwest of the epicenter. Eye-witnesses described the shaking as “unbelievable” and “surreal” noting that some building towers were swaying for over a minute after the shock spread. The effect may have been due to the shallow depth of the shock, which occurred at an estimated depth of about 10km (+/- 2.5km).

Latest Casualty Report

“One person died when a house in Mexicali collapsed, Alfredo Escobedo, director of emergency services in Baja California state, Mexico, told Reuters. He said others were reported trapped in elevators, retaining walls had collapsed in some places and electricity was out in several parts of the state.” Reuters reported.

The quake also caused a two-story parking garage next to the Mexicali government headquarters to collapse, injuring several others, according to another report.

Local media in Mexicali report that about a dozen people are still trapped in their homes.

Tsunami Information

According to various tsunami centers, NO destructive tsunami was generated as a result of the quake.

Northern California

An earthquake measuring 4.0Mw  Northern California at 3:49 pm Sunday (local time). The epicenter was located about 25 miles north of Santa Rosa, a report said.

Reader’s Comment:

In response to a reader’s comment, a Fire-Earth Moderator likened  California region to a lake covered with a thin layer of ice, which was frequented by too many full-time ice skaters.


Location Map. Source: EMS. Click image to enlarge.

Summary of Earthquake Details (EMSC)

  • Magnitude:  Mw 7.0 Region: BAJA CALIFORNIA, MEXICO
  • Date time:  2010-04-04 at 22:40:47.7 UTC
  • Location: 32.38 N ; 115.04 W
  • Depth: 10 km
  • Distances (USGS)
    • 26 km (16 miles) SW (225°) from Guadalupe Victoria, Baja California, Mexico
    • 60 km (38 miles) SSE (165°) from Mexicali, Baja California, Mexico
    • 62 km (38 miles) SW (233°) from San Luis Río Colorado, Sonora, Mexico
    • 167 km (104 miles) ESE (105°) from Tijuana, Baja California, Mexico
    • 173 km (108 miles) ESE (106°) from Tijuana, Baja California, Mexico

10-degree Map Centered at 30°N,115°W


Earthquake Location Map. Source: USGS/EHP (earlier map with incorrect data)


Earthquake Location Map. Source: USGS/EHP (Later map with correction made). Color code changed by Fire-Earth Moderators from navy to fluorescent blue for improved visibility. Click image to enlarge.

Earthquake Details (USGS) – [Corrected]

  • Magnitude: 7.2
  • Date-Time:
    • Sunday, April 04, 2010 at 22:40:40 UTC
    • Sunday, April 04, 2010 at 03:40:40 PM at epicenter
  • Location: 32.128°N, 115.303°W
  • Depth: 10 km (6.2 miles) (poorly constrained)
  • Region: BAJA CALIFORNIA, MEXICO
  • Distances:
    • 26 km (16 miles) SW (225°) from Guadalupe Victoria, Baja California, Mexico
    • 60 km (38 miles) SSE (165°) from Mexicali, Baja California, Mexico
    • 62 km (38 miles) SW (233°) from San Luis Río Colorado, Sonora, Mexico
    • 167 km (104 miles) ESE (105°) from Tijuana, Baja California, Mexico
  • Location Uncertainty: horizontal +/- 2.4 km (1.5 miles); depth +/- 31.6 km (19.6 miles)
  • Parameters Nph= 13, Dmin=70 km, Rmss=0.28 sec, Gp=259°, M-type=regional moment magnitude (Mw), Version=2
  • Source:   California Integrated Seismic Net –  USGS Caltech CGS UCB UCSD UNR
  • Event ID: ci14607652

Location Map


Source: USGS/EHP. Click image to enlarge.

Seismic Hazard Map


ShakeMap (USGS)


Population Exposure (USGS)


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Posted in earthquake, Guadalupe, Mexicali quake, Sonora, Tijuana quake | Tagged: , , , , | 1 Comment »

Strong Earthquake Strikes Baja California

Posted by feww on December 31, 2009

Fire Earth Expects Large-Scale Seismicity in Calif

Earthquake measuring up to M6.1 strikes Baja California, Mexico

Strong earthquake measuring up to 6.1Mw struck Baja, California about 21 km (13 miles) NNW (339°) of Guadalupe Victoria, Mexico, at a depth of 12 km, December 30, 2009 at 10:49 AM local time.

The mainshock was preceded by one or more foreshocks, and up to 4 dozen aftershocks the largest of which measured about 5.0Mw, as of posting.

The quake was felt in Phoenix (dozens of Arizona cities were shaken), San Diego (it caused buildings sway briefly), Tijuana, Yuma (building damage was reported), and even as far away as Los Angeles, according to several reports.

Earthquake Details [as reported by USGS/EHP]

  • Magnitude: 5.8  [Maximum EQ magnitude estimated at 6.1 Mw by FEWW]
  • Date-Time:
    • Wednesday, December 30, 2009 at 18:48:57 UTC
    • Wednesday, December 30, 2009 at 10:48:57 AM at epicenter
  • Location: 32.464°N, 115.189°W
  • Depth: 6 km (3.7 miles) (poorly constrained)
  • Region: BAJA CALIFORNIA, MEXICO
  • Distances:
    • 21 km (13 miles) NNW (339°) from Guadalupe Victoria, Baja California, Mexico
    • 33 km (21 miles) SE (129°) from Mexicali, Baja California, Mexico
    • 37 km (23 miles) SE (129°) from Calexico, CA
    • 172 km (107 miles) E (92°) from Tijuana, Baja California, Mexico
  • Location Uncertainty: horizontal +/- 1.8 km (1.1 miles); depth +/- 31.6 km (19.6 miles)
  • Parameters: Nph= 20, Dmin=36 km, Rmss=0.39 sec, Gp=205°,
  • M-type=regional moment magnitude (Mw), Version=8
  • Source: California Integrated Seismic Net: USGS Caltech CGS UCB UCSD UNR
  • Event ID: ci14565620

10-degree Map Centered at 30°N,115°W


Earthquake Location Map. Source USGS/EHP

Related Links:


Posted in earthquake forecast, Earthquake news, earthquake update, Los Angeles quake, Yuma | Tagged: , , , , , , | Leave a Comment »

Magnitude 6.9 Quake Strikes Gulf of California

Posted by feww on August 3, 2009

Details of April 4, 2010 quake in BAJA posted at

M7.3 Quake Hits Baja

A powerful earthquake measuring 6.9Mw and strong fore- and aftershocks rock Baja, California

A strong earthquake measuring 6.9Mw struck Gulf of California Monday, August 03, 2009 at 17:59:56 UTC, USGS reported.

The M6.9 mainshock was preceded by a 5.8Mw foreshock and followed by two aftershocks measuring 5.0 and 5.9Mw.

More aftershocks are almost certain to follow.

AP reported:

Phoenix Fire Department spokesman Alex Rangel said a high-rise near downtown shook violently enough that workers evacuated, but there were no reports of injuries or damage. The quake was centered about 460 miles (740 kilometers) from Phoenix.

Earthquake Details [Mainshock]

  • Magnitude: 6.9
  • Date-Time:
    • Monday, August 03, 2009 at 17:59:56 UTC
    • Monday, August 03, 2009 at 10:59:56 AM at epicenter
  • Location: 29.066°N, 112.871°W
  • Depth: 10 km (6.2 miles) set by location program
  • Region: GULF OF CALIFORNIA
  • Distances
    • 89 km (56 miles) NNE (31°) from Santa Isabel, Baja California, Mexico
    • 137 km (85 miles) W (280°) from La Doce, Sonora, Mexico
    • 174 km (108 miles) NE (46°) from Guerrero Negro, Baja California Sur, Mexico
    • 185 km (115 miles) W (270°) from Hermosillo, Sonora, Mexico
    • 553 km (343 miles) SE (133°) from Tijuana, Baja California, Mexico
  • Location Uncertainty: horizontal +/- 7.1 km (4.4 miles); depth fixed by location program
  • Parameters:  NST=140, Nph=140, Dmin=411.8 km, Rmss=1.31 sec, Gp= 97°, M-type=teleseismic moment magnitude (Mw), Version=7
  • Source: USGS NEIC (WDCS-D)
  • Event ID:  us2009jwbh

10-degree Map Centered at 30°N,115°W

us2009jwbh Gulf of Calif
Earthquake Location Map. USGS

Seismic Hazard Map

us2009jwbh Gulf of Calif  Seismic Hazard Map
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green. USGS

Historic Seismicity us2009jwbh
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green. USGS

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Posted in Earthquakes, La Doce Sonora, Seismic Hazard, Seismic report | Tagged: , , , , | 5 Comments »