SCSNM3.8 – SCSN https://www.scsn.org/index.html Southern California Seismic Network Wed, 07 May 2025 14:04:15 +0000 en-US hourly 1 https://wordpress.org/?v=5.1.12 05/31/2024, M3.8 near Ojai ../../../../index.php/2024/05/31/05-31-2024-m3-8-near-ojai/index.html ../../../../index.php/2024/05/31/05-31-2024-m3-8-near-ojai/#respond Fri, 31 May 2024 19:19:34 +0000 http://www.scsn.org/?p=4958 …
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]]> Event

  • 31 May 2024 10:26:53 PDT, (34.463, -119.193), depth 17.6km.
  • 5km ENE of Ojai, California

Aftershocks

  • As of 31 May 2024, 11:41AM PDT, there has been 1 aftershock recorded, M0.9.
  • Aftershocks may be expected in the next few days, the largest expected is approximately 1 magnitude unit smaller than the mainshock.
  • There is a small chance (about 5%) that a larger quake could occur, with the likelihood decreasing over time.

Historical Seismicity

  • Since our records began in 1932 we’ve had 7 events of M4 or greater within 10km of today’s event.
  • The largest historic event was M5.1 on 2023/08/20.
  • The most recent historic event was M4.0 on 03 Nov 2023.

Faults

  • CFM fault associations: most likely Santa Ynez fault; 60dip segment (38%). Alternates: Not associated with a CFM modeled fault (18%), Other CFM faults (44%).*
  • Nearby faults: San Cayetano fault (1.3 km), Mission Ridge fault system, Santa Ana section (Santa Ana fault) (1.5 km), Lion Canyon fault (3.7 km), Sisar fault zone (Big Canyon fault) (4.8 km), Sisar fault zone (Sisar fault) (4.8 km), Faults near Oakview and Meiners Oaks (La Vista fault) (5.0 km), faults near Oakview and Meiners Oaks (Villanova fault) (6.4 km).**

Additional Information




*Earthquakes can occur both near or on major known faults, and in places where no clear fault zones are known. Using the statistical method of Evans et al. (in prep. 2019) the location and focal mechanism of this earthquake suggest the above association with modeled faults in the Community Fault Model (CFM) provided by the Southern California Earthquake Center (SCEC) and Harvard University. Note that the CFM fault association may be different from the nearby faults list. Differences may arise due to different fault databases, and because the CFM fault association uses the hypocenter with relation to subsurface 3-dimensional fault orientation models, while the nearby faults list utilizes mapped surface traces as they relate to the epicenter.

CFM Fault: SCEC CFM 5.0 Fault name and closest segment if available; The CFM is maintained by Harvard University, Dept of Earth & Planetary Sciences.

Probability: The probability in percent the earthquake is associated with this fault.

SCSN: Caltech/USGS Southern California Seismic Network

**U.S. Geological Survey and California Geological Survey, 2006, Quaternary fault and fold database for the United States, accessed 2015, from USGS web site: https://earthquake.usgs.gov/hazards/qfaults/

This information is subject to change as more up-to-date data become available.

]]> ../../../../index.php/2024/05/31/05-31-2024-m3-8-near-ojai/feed/ 0 04/13/2024, M3.8 near Borrego Springs ../../../../index.php/2024/04/14/04-13-2024-m3-8-near-borrego-springs/index.html ../../../../index.php/2024/04/14/04-13-2024-m3-8-near-borrego-springs/#respond Sun, 14 Apr 2024 15:49:32 +0000 http://www.scsn.org/?p=4917 …
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]]> Event

  • 13 Apr 2024 09:08:38 PDT, (33.360, -116.305), depth 11.6km.
  • 13km NNE of Borrego Springs, California

Aftershocks

  • As of 14 Apr 2024, 08:43AM PDT, there have been 2 aftershocks recorded.
  • The largest was M1.2 (smallest M1.2).
  • More aftershocks may be expected in the next few days, the largest expected is approximately 1 magnitude unit smaller than the mainshock.
  • There is a small chance (about 5%) that a larger quake could occur, with the likelihood decreasing over time.

Historical Seismicity

  • Since our records began in 1932 we’ve had 40 events of M4 or greater within 10km of today’s event.
  • The largest historic event was M6.0 on 1937/03/25.
  • The most recent historic event was M4.1 on 31 Dec 2022.

Faults

  • CFM fault associations: most likely Clark fault; south segment (53%). Alternates: Not associated with a CFM modeled fault (4%), Other CFM faults (43%).*
  • Nearby faults: San Jacinto fault zone, Anza section (Clark fault) (1.2 km), San Jacinto fault zone, Coyote Creek section (Coyote Creek fault) (4.7 km), San Jacinto fault zone, Anza section (5.2 km), San Jacinto fault zone, Coyote Creek section (5.2 km) and San Jacinto fault zone, Anza section (Buck Ridge fault) (9.0 km).**

Additional Information


Below are the waveform data associated with this event, as recorded in our Live Seismograms Feed.


*Earthquakes can occur both near or on major known faults, and in places where no clear fault zones are known. Using the statistical method of Evans et al. (in prep. 2019) the location and focal mechanism of this earthquake suggest the above association with modeled faults in the Community Fault Model (CFM) provided by the Southern California Earthquake Center (SCEC) and Harvard University. Note that the CFM fault association may be different from the nearby faults list. Differences may arise due to different fault databases, and because the CFM fault association uses the hypocenter with relation to subsurface 3-dimensional fault orientation models, while the nearby faults list utilizes mapped surface traces as they relate to the epicenter.

CFM Fault: SCEC CFM 5.0 Fault name and closest segment if available; The CFM is maintained by Harvard University, Dept of Earth & Planetary Sciences.

Probability: The probability in percent the earthquake is associated with this fault.

SCSN: Caltech/USGS Southern California Seismic Network

**U.S. Geological Survey and California Geological Survey, 2006, Quaternary fault and fold database for the United States, accessed 2015, from USGS web site: https://earthquake.usgs.gov/hazards/qfaults/

This information is subject to change as more up-to-date data become available.

]]> ../../../../index.php/2024/04/14/04-13-2024-m3-8-near-borrego-springs/feed/ 0 02/05/2024, M3.8 near Puebla, B.C. ../../../../index.php/2024/02/05/02-05-2024-m3-8-near-puebla-b-c-mexico/index.html ../../../../index.php/2024/02/05/02-05-2024-m3-8-near-puebla-b-c-mexico/#respond Mon, 05 Feb 2024 19:32:19 +0000 http://www.scsn.org/?p=4889 …
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]]> Event

  • 05 Feb 2024 00:56:19 PST, (32.380, -115.478), depth 11.0km.
  • 24km SSW of Puebla, B.C., Mexico

Aftershocks

  • As of 05 Feb 2024, 11:26AM PST, there have been 2 aftershocks recorded.
  • The largest was M1.9 (smallest M1.8).
  • More aftershocks may be expected in the next few days, the largest expected is approximately 1 magnitude unit smaller than the mainshock.
  • There is a small chance (about 5%) that a larger quake could occur, with the likelihood decreasing over time.

Historical Seismicity

  • Since our records began in 1932 we’ve had 51 events of M4 or greater within 10km of today’s event.
  • The largest historic event was M5.7 on 2002/02/22.
  • The most recent historic event was M4.0 on 22 Dec 2020.

Faults

  • CFM fault associations: most likely Sierra Cucapah fault (74%). Alternates: Not associated with a CFM modeled fault (7%), Other CFM faults (19%).*

Additional Information


Below are the waveform data associated with this event, as recorded in our Live Seismograms Feed.


*Earthquakes can occur both near or on major known faults, and in places where no clear fault zones are known. Using the statistical method of Evans et al. (in prep. 2019) the location and focal mechanism of this earthquake suggest the above association with modeled faults in the Community Fault Model (CFM) provided by the Southern California Earthquake Center (SCEC) and Harvard University. Note that the CFM fault association may be different from the nearby faults list. Differences may arise due to different fault databases, and because the CFM fault association uses the hypocenter with relation to subsurface 3-dimensional fault orientation models, while the nearby faults list utilizes mapped surface traces as they relate to the epicenter.

CFM Fault: SCEC CFM 5.0 Fault name and closest segment if available; The CFM is maintained by Harvard University, Dept of Earth & Planetary Sciences.

Probability: The probability in percent the earthquake is associated with this fault.

SCSN: Caltech/USGS Southern California Seismic Network

**U.S. Geological Survey and California Geological Survey, 2006, Quaternary fault and fold database for the United States, accessed 2015, from USGS web site: https://earthquake.usgs.gov/hazards/qfaults/

This information is subject to change as more up-to-date data become available.

]]> ../../../../index.php/2024/02/05/02-05-2024-m3-8-near-puebla-b-c-mexico/feed/ 0 02/04/2024, M3.8 near Bodfish ../../../../index.php/2024/02/05/02-04-2024-m3-8-near-bodfish/index.html ../../../../index.php/2024/02/05/02-04-2024-m3-8-near-bodfish/#respond Mon, 05 Feb 2024 19:29:29 +0000 http://www.scsn.org/?p=4887 …
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]]> Event

  • 04 Feb 2024 17:06:53 PST, (35.393, -118.225), depth 7.2km.
  • 32km SE of Bodfish, California

Aftershocks

  • As of 05 Feb 2024, 11:24AM PST, there has been 1 aftershock recorded, M1.9.
  • Aftershocks may be expected in the next few days, the largest expected is approximately 1 magnitude unit smaller than the mainshock.
  • There is a small chance (about 5%) that a larger quake could occur, with the likelihood decreasing over time.

Historical Seismicity

  • Since our records began in 1932 we’ve had 11 events of M4 or greater within 10km of today’s event.
  • The largest historic event was M4.7 on 1952/07/25.
  • The most recent historic event was M4.0 on 27 Aug 2021.

Faults

  • CFM fault associations: most likely Not associated with a CFM modeled fault (97%). Alternates: White Wolf fault (3%).*

Additional Information


Below are the waveform data associated with this event, as recorded in our Live Seismograms Feed.


*Earthquakes can occur both near or on major known faults, and in places where no clear fault zones are known. Using the statistical method of Evans et al. (in prep. 2019) the location and focal mechanism of this earthquake suggest the above association with modeled faults in the Community Fault Model (CFM) provided by the Southern California Earthquake Center (SCEC) and Harvard University. Note that the CFM fault association may be different from the nearby faults list. Differences may arise due to different fault databases, and because the CFM fault association uses the hypocenter with relation to subsurface 3-dimensional fault orientation models, while the nearby faults list utilizes mapped surface traces as they relate to the epicenter.

CFM Fault: SCEC CFM 5.0 Fault name and closest segment if available; The CFM is maintained by Harvard University, Dept of Earth & Planetary Sciences.

Probability: The probability in percent the earthquake is associated with this fault.

SCSN: Caltech/USGS Southern California Seismic Network

**U.S. Geological Survey and California Geological Survey, 2006, Quaternary fault and fold database for the United States, accessed 2015, from USGS web site: https://earthquake.usgs.gov/hazards/qfaults/

This information is subject to change as more up-to-date data become available.

]]> ../../../../index.php/2024/02/05/02-04-2024-m3-8-near-bodfish/feed/ 0 07/02/2023, M3.8 near Malibu ../../../../index.php/2023/07/02/07-02-2023-m3-8-near-malibu/index.html ../../../../index.php/2023/07/02/07-02-2023-m3-8-near-malibu/#respond Sun, 02 Jul 2023 14:39:51 +0000 http://www.scsn.org/?p=4604 …
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]]> Event

  • 02 Jul 2023 02:29:48 PDT, (33.843, -118.888), depth 29.7km.
  • 19km SSW of Malibu, California

Aftershocks

  • As of 02 Jul 2023, 07:36AM PDT, there has been 1 aftershock recorded, M2.0.
  • Aftershocks may be expected in the next few days, the largest expected is approximately 1 magnitude unit smaller than the mainshock.
  • There is a small chance (about 5%) that a larger quake could occur, with the likelihood decreasing over time.

Historical Seismicity

  • Since our records began in 1932 we’ve had 2 events of M4 or greater within 10km of today’s event.
  • The largest historic event was M4.5 on 1948/04/16.
  • The most recent historic event was M4.2 on 25 Jan 2023.

Faults

  • Nearby faults: San Pedro Basin fault zone (San Pedro Basin fault) (4.2 km).**

Additional Information


Below are the waveform data associated with this event, as recorded in our Live Seismograms Feed.


*Earthquakes can occur both near or on major known faults, and in places where no clear fault zones are known. Using the statistical method of Evans et al. (in prep. 2019) the location and focal mechanism of this earthquake suggest the above association with modeled faults in the Community Fault Model (CFM) provided by the Southern California Earthquake Center (SCEC) and Harvard University. Note that the CFM fault association may be different from the nearby faults list. Differences may arise due to different fault databases, and because the CFM fault association uses the hypocenter with relation to subsurface 3-dimensional fault orientation models, while the nearby faults list utilizes mapped surface traces as they relate to the epicenter.

CFM Fault: SCEC CFM 5.0 Fault name and closest segment if available; The CFM is maintained by Harvard University, Dept of Earth & Planetary Sciences.

Probability: The probability in percent the earthquake is associated with this fault.

SCSN: Caltech/USGS Southern California Seismic Network

**U.S. Geological Survey and California Geological Survey, 2006, Quaternary fault and fold database for the United States, accessed 2015, from USGS web site: https://earthquake.usgs.gov/hazards/qfaults/

This information is subject to change as more up-to-date data become available.

]]> ../../../../index.php/2023/07/02/07-02-2023-m3-8-near-malibu/feed/ 0 12/01/2022, M3.8 near Ocotillo ../../../../index.php/2022/12/01/12-01-2022-m3-8-near-ocotillo/index.html ../../../../index.php/2022/12/01/12-01-2022-m3-8-near-ocotillo/#respond Thu, 01 Dec 2022 15:44:35 +0000 http://www.scsn.org/?p=4453 …
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]]> Event

  • 01 Dec 2022 07:28:29 PST, (32.835, -116.032), depth 11.2km.
  • 12km NNW of Ocotillo, California

Aftershocks

  • As of 01 Dec 2022, 07:35AM PST, there has been 1 aftershock recorded, M1.9.
  • Aftershocks may be expected in the next few days, the largest expected is approximately 1 magnitude unit smaller than the mainshock.
  • There is a small chance (about 5%) that a larger quake could occur, with the likelihood decreasing over time.

Historical Seismicity

  • Since our records began in 1932 we’ve had 38 events of M4 or greater within 10km of today’s event.
  • The largest historic event was M5.7 on 2010/06/15.
  • The most recent historic event was M4.1 on 02 Oct 2012.

Faults

  • Nearby faults: Elsinore fault zone, Coyote Mountain section (Elsinore fault) (4.7 km), unnamed faults north of Coyote Wash (5.8 km), Elsinore fault zone, Coyote Mountain section (6.4 km) and Yuha Wells fault (10.6 km).**

Additional Information


Below are the waveform data associated with this event, as recorded in our Live Seismograms Feed.


*Earthquakes can occur both near or on major known faults, and in places where no clear fault zones are known. Using the statistical method of Evans et al. (in prep. 2019) the location and focal mechanism of this earthquake suggest the above association with modeled faults in the Community Fault Model (CFM) provided by the Southern California Earthquake Center (SCEC) and Harvard University. Note that the CFM fault association may be different from the nearby faults list. Differences may arise due to different fault databases, and because the CFM fault association uses the hypocenter with relation to subsurface 3-dimensional fault orientation models, while the nearby faults list utilizes mapped surface traces as they relate to the epicenter.

CFM Fault: SCEC CFM 5.0 Fault name and closest segment if available; The CFM is maintained by Harvard University, Dept of Earth & Planetary Sciences.

Probability: The probability in percent the earthquake is associated with this fault.

SCSN: Caltech/USGS Southern California Seismic Network

**U.S. Geological Survey and California Geological Survey, 2006, Quaternary fault and fold database for the United States, accessed 2015, from USGS web site: https://earthquake.usgs.gov/hazards/qfaults/

This information is subject to change as more up-to-date data become available.

]]> ../../../../index.php/2022/12/01/12-01-2022-m3-8-near-ocotillo/feed/ 0 10/20/2022, M3.8 near San Clemente Is ../../../../index.php/2022/10/20/10-20-2022-m3-8-near-san-clemente-is/index.html ../../../../index.php/2022/10/20/10-20-2022-m3-8-near-san-clemente-is/#respond Thu, 20 Oct 2022 18:31:38 +0000 http://www.scsn.org/?p=4435 …
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]]> Event

  • 20 Oct 2022 02:53:20 PDT, (31.922, -118.228), depth 5.8km.
  • Offshore event 100km S of San Clemente Island.

Aftershocks

  • As of 20 Oct 2022, 11:25AM PDT, there have been no aftershocks recorded.
  • Aftershocks may be expected in the next few days, the largest expected is approximately 1 magnitude unit smaller than the mainshock.
  • There is a small chance (about 5%) that a larger quake could occur, with the likelihood decreasing over time.



Below are the waveform data associated with this event, as recorded in our Live Seismograms Feed.


*Earthquakes can occur both near or on major known faults, and in places where no clear fault zones are known. Using the statistical method of Evans et al. (in prep. 2019) the location and focal mechanism of this earthquake suggest the above association with modeled faults in the Community Fault Model (CFM) provided by the Southern California Earthquake Center (SCEC) and Harvard University. Note that the CFM fault association may be different from the nearby faults list. Differences may arise due to different fault databases, and because the CFM fault association uses the hypocenter with relation to subsurface 3-dimensional fault orientation models, while the nearby faults list utilizes mapped surface traces as they relate to the epicenter.

CFM Fault: SCEC CFM 5.0 Fault name and closest segment if available; The CFM is maintained by Harvard University, Dept of Earth & Planetary Sciences.

Probability: The probability in percent the earthquake is associated with this fault.

SCSN: Caltech/USGS Southern California Seismic Network

**U.S. Geological Survey and California Geological Survey, 2006, Quaternary fault and fold database for the United States, accessed 2015, from USGS web site: https://earthquake.usgs.gov/hazards/qfaults/

This information is subject to change as more up-to-date data become available.

]]> ../../../../index.php/2022/10/20/10-20-2022-m3-8-near-san-clemente-is/feed/ 0 07/17/2022, M3.8 swarm near Bodfish, Update ../../../../index.php/2022/09/27/07-17-2022-m3-8-swarm-near-bodfish/index.html ../../../../index.php/2022/09/27/07-17-2022-m3-8-swarm-near-bodfish/#respond Tue, 27 Sep 2022 06:55:44 +0000 http://www.scsn.org/?p=4373 …
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]]> Significant Events

  • Largest event: M3.8, 17 Jul 2022 08:44:26 PDT, (35.513, -118.387), depth 4.7km. 13km SE of Bodfish, California.
  • As of 27 Sep 2022, 06:49AM PDT, the following event numbers have been recorded in the swarm:
    • M≥3: 6
    • M≥2: 17
  • All M3 events recorded:
    • M 3.5 05 Jul 2022 23:15:46 PDT, (35.555, -118.402), 40297864
    • M 3.5 17 Jul 2022 04:34:47 PDT, (35.487, -118.285), 40065175
    • M 3.8 17 Jul 2022 08:44:26 PDT, (35.513, -118.387), 40065255
    • M 3.4 18 Jul 2022 10:07:58 PDT, (35.515, -118.387), 40065903
    • M 3.4 28 Aug 2022 15:48:03 PDT, (35.645, -118.318), 40333424
    • M 3.7 27 Sep 2022 01:03:39 PDT, (35.510, -118.390), 40107167

Swarm Numbers

  • As of 27 Sep 2022, 06:49AM PDT, we have recorded 159 events in the swarm (within a 20 km radius, and counting 90 days before the M3.7). The smallest event is magnitude 0.7. Many of the smaller events are still being analyzed and will be gradually added to the catalogue.
  • More activity is expected in the next few days, swarm activity in Southern California can continue for hours, days, weeks, months or years. For more information on swarms please see our Swarm page.

Historical Seismicity

  • Since our records began in 1932 we’ve had 19 events of M4 or greater within 10km of today’s event.
  • The largest historic event was M4.9 on 2001/02/02.
  • The most recent historic event was M4.0 on 27 Aug 2021.

Faults

  • CFM fault associations: most likely Lake Isabella lineament (61%). Alternates: Not associated with a CFM modeled fault (15%), Other CFM faults (24%).*

Additional Information


Below are the waveform data associated with this event, as recorded in our Live Seismograms Feed.


*Earthquakes can occur both near or on major known faults, and in places where no clear fault zones are known. Using the statistical method of Evans et al. (in prep. 2019) the location and focal mechanism of this earthquake suggest the above association with modeled faults in the Community Fault Model (CFM) provided by the Southern California Earthquake Center (SCEC) and Harvard University. Note that the CFM fault association may be different from the nearby faults list. Differences may arise due to different fault databases, and because the CFM fault association uses the hypocenter with relation to subsurface 3-dimensional fault orientation models, while the nearby faults list utilizes mapped surface traces as they relate to the epicenter.

CFM Fault: SCEC CFM 5.0 Fault name and closest segment if available; The CFM is maintained by Harvard University, Dept of Earth & Planetary Sciences.

Probability: The probability in percent the earthquake is associated with this fault.

SCSN: Caltech/USGS Southern California Seismic Network

**U.S. Geological Survey and California Geological Survey, 2006, Quaternary fault and fold database for the United States, accessed 2015, from USGS web site: https://earthquake.usgs.gov/hazards/qfaults/

This information is subject to change as more up-to-date data become available.

]]> ../../../../index.php/2022/09/27/07-17-2022-m3-8-swarm-near-bodfish/feed/ 0 05/15/2022, M3.8 near Desert Hot Springs ../../../../index.php/2022/05/16/05-15-2022-m3-8-near-desert-hot-springs/index.html ../../../../index.php/2022/05/16/05-15-2022-m3-8-near-desert-hot-springs/#respond Mon, 16 May 2022 14:49:33 +0000 http://www.scsn.org/?p=4336 …
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]]> Event

  • 15 May 2022 23:16:50 PDT, (34.008, -116.445), depth 8.2km.
  • 7km NE of Desert Hot Springs, California

Aftershocks

  • As of 16 May 2022, 07:45AM PDT, there have been 8 aftershocks recorded.
  • The largest was M2.9 (smallest M0.7).
  • More aftershocks may be expected in the next few days, the largest expected is approximately 1 magnitude unit smaller than the mainshock.
  • There is a small chance (about 5%) that a larger quake could occur, with the likelihood decreasing over time.

Historical Seismicity

  • Since our records began in 1932 we’ve had 124 events of M4 or greater within 10km of today’s event.
  • The largest historic event was M6.1 on 1992/04/23.
  • The most recent historic event was M4.0 on 06 Aug 2010.

Faults

  • CFM fault associations: most likely Long Canyon fault (76%). Alternates: Not associated with a CFM modeled fault (4%), Other CFM faults (20%).*
  • Nearby faults: Long Canyon fault (1.0 km), Burnt Mountain fault zone (East Wide Canyon fault) (4.2 km), San Andreas fault zone, San Bernardino Mountains section (Mission Creek fault) (6.1 km), Burnt Mountain fault zone (Burnt Mountain fault) (6.6 km), San Andreas fault zone, San Bernardino Mountains section (North Branch SAF) (6.8 km), Eureka Peak fault (8.2 km), Pinto Mountain fault zone (Morongo Valley fault) (10.0 km), Pinto Mountain fault zone (Pinto Mountain fault) (11.0 km), Pinto Mountan fault zone (11.4 km), San Andreas fault zone, San Bernardino Mountains section (11.4 km), San Andreas fault zone, San Bernardino Mountains section (South Branch SAF) (12.4 km) and unnamed Fault in the Little San Bernardino Mountains (13.0 km).**

Additional Information


Below are the waveform data associated with this event, as recorded in our Live Seismograms Feed.


*Earthquakes can occur both near or on major known faults, and in places where no clear fault zones are known. Using the statistical method of Evans et al. (in prep. 2019) the location and focal mechanism of this earthquake suggest the above association with modeled faults in the Community Fault Model (CFM) provided by the Southern California Earthquake Center (SCEC) and Harvard University. Note that the CFM fault association may be different from the nearby faults list. Differences may arise due to different fault databases, and because the CFM fault association uses the hypocenter with relation to subsurface 3-dimensional fault orientation models, while the nearby faults list utilizes mapped surface traces as they relate to the epicenter.

CFM Fault: SCEC CFM 5.0 Fault name and closest segment if available; The CFM is maintained by Harvard University, Dept of Earth & Planetary Sciences.

Probability: The probability in percent the earthquake is associated with this fault.

SCSN: Caltech/USGS Southern California Seismic Network

**U.S. Geological Survey and California Geological Survey, 2006, Quaternary fault and fold database for the United States, accessed 2015, from USGS web site: https://earthquake.usgs.gov/hazards/qfaults/

This information is subject to change as more up-to-date data become available.

]]> ../../../../index.php/2022/05/16/05-15-2022-m3-8-near-desert-hot-springs/feed/ 0 02/09/2021, M3.8 swarm near Calipatria ../../../../index.php/2021/02/11/02-09-2021-m3-8-swarm-near-calipatria/index.html ../../../../index.php/2021/02/11/02-09-2021-m3-8-swarm-near-calipatria/#respond Thu, 11 Feb 2021 18:36:37 +0000 http://www.scsn.org/?p=3941 …
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]]> Significant Events

  • Largest event: M3.8, 09 Feb 2021 17:01:15 PST, (33.175, -115.613), depth 3.8km. 11km WNW of Calipatria, California.
  • As of 11 Feb 2021, 10:19AM PST, the following event numbers have been recorded in the swarm:
    • M≥3: 5
    • M≥2: 23
  • All M3 events recorded:
    • M 3.0 09 Feb 2021 03:51:26 PST, (33.158, -115.633), 39546087
    • M 3.8 09 Feb 2021 17:01:15 PST, (33.175, -115.613), 39546863
    • M 3.2 09 Feb 2021 17:01:41 PST, (33.172, -115.600), 39546855
    • M 3.1 09 Feb 2021 17:25:07 PST, (33.172, -115.608), 39546951
    • M 3.8 09 Feb 2021 17:27:09 PST, (33.175, -115.612), 39546975

Swarm Numbers

  • As of 11 Feb 2021, 10:33AM PST, we have recorded 111 events in the swarm (within a 20 km radius, and counting 5 days before largest event). The smallest event is magnitude 0.5. Many of the smaller events are still being analyzed and will be gradually added to the catalogue.
  • More activity is expected in the next few days, swarm activity in Southern California can continue for hours, days, weeks, months or years. For more information on swarms please see our Swarm page.

Historical Seismicity

  • Since our records began in 1932 we’ve had 98 events of M4 or greater within 10km of today’s event.
  • The largest historic event was M6.2 on 1987/11/24.
  • The most recent historic event was M4.0 on 04 Jan 2021.

Faults

  • CFM fault associations: most likely Not associated with a CFM modeled fault (38%). Alternates: Elmore Ranch fault (28%), Other CFM faults (34%).*

Additional Information


Below are the waveform data associated with the M3.8 at 17:01 PST 09/02/2021, as recorded in our Live Seismograms Feed.


*Earthquakes can occur both near or on major known faults, and in places where no clear fault zones are known. Using the statistical method of Evans et al. (in prep. 2019) the location and focal mechanism of this earthquake suggest the above association with modeled faults in the Community Fault Model (CFM) provided by the Southern California Earthquake Center (SCEC) and Harvard University. Note that the CFM fault association may be different from the nearby faults list. Differences may arise due to different fault databases, and because the CFM fault association uses the hypocenter with relation to subsurface 3-dimensional fault orientation models, while the nearby faults list utilizes mapped surface traces as they relate to the epicenter.

CFM Fault: SCEC CFM 5.0 Fault name and closest segment if available; The CFM is maintained by Harvard University, Dept of Earth & Planetary Sciences.

Probability: The probability in percent the earthquake is associated with this fault.

SCSN: Caltech/USGS Southern California Seismic Network

**U.S. Geological Survey and California Geological Survey, 2006, Quaternary fault and fold database for the United States, accessed 2015, from USGS web site: https://earthquake.usgs.gov/hazards/qfaults/

This information is subject to change as more up-to-date data become available.

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