SCSNM4.3 – SCSN

04/18/2024, M4.3 near Bodfish

Zackary Newman — Thu, 18 Apr 2024 19:39:31 +0000

Event

18 Apr 2024 12:19:17 PDT, (35.493, -118.510), depth 0.1km.
11km S of Bodfish, California

Aftershocks

As of 18 Apr 2024, 12:33PM 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.

Historical Seismicity

Since our records began in 1932 we’ve had 45 events of M4 or greater within 10km of today’s event.
The largest historic event was M5.5 on 1952/07/25.
The most recent historic event was M4.0 on 27 Aug 2021.

Faults

CFM fault associations: most likely Kern Canyon fault (86%). Alternates: Not associated with a CFM modeled fault (7%), Other CFM faults (7%).*

Additional Information

Links for: USGS earthquake page, ShakeMap, DYFI, waveforms.
Visit our special reports page for further information on local notable earthquakes.
Visit scedc.caltech.edu to access any data recorded by the SCSN.

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.

07/16/2023, M4.5, 4.3 near Estacion Coahuila, B.C., MX

Zackary Newman — Sun, 16 Jul 2023 20:11:21 +0000

Event

M 4.6 Mw, 16 Jul 2023 12:16:05 PDT, (31.566, -114.415), depth 6.0km.
M 3.1 Ml, 16 Jul 2023 12:33:20 PDT, (31.530, -114.384), depth 6.0km.
M 4.3 Mw, 16 Jul 2023 12:37:19 PDT, (31.542, -114.397), depth 6.0km.
92km SE of Estacion Coahuila, B.C., Mexico

Aftershocks

As of 16 Jul 2023, 01:04PM 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.

Possible Foreshocks

There were 1 events during the 3 days prior to the earthquake (within a 10 km radius).
The largest was M2.8 (2023/07/15).

Historical Seismicity

Since our records began in 1932 we’ve had 3 events of M4 or greater within 10km of today’s event.
The largest historic event was M5.5 on 1976/12/07.
The most recent historic event was M4.1 on 10 May 2019.

Additional Information

Links for: USGS earthquake page, ShakeMap, DYFI, waveforms.
Visit our special reports page for further information on local notable earthquakes.
Visit scedc.caltech.edu to access any data recorded by the SCSN.

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

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

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

05/20/2023, M4.3 near Big Pine

Zackary Newman — Sun, 21 May 2023 17:43:01 +0000

Event

20 May 2023 20:26:29 PDT, (37.283, -117.583), depth 5.1km.
64km ENE of Big Pine, California

Aftershocks

As of 21 May 2023, 10:30AM 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.

Possible Foreshocks

There were 1 events during the 3 days prior to the earthquake (within a 10 km radius).
The largest was M3.0 (2023/05/21).

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 M4.6 on 1993/05/17.
The most recent historic event was M4.6 on 17 May 1993.

Faults

Nearby faults: Fish Lake Valley fault zone, Cucomongo section (4.2 km), Northern Death Valley fault zone, Grapevine Mountains section (5.6 km), Tule Canyon faults (6.8 km), Wild Rose Spring fault (9.6 km), Lida faults (12.4 km) and Gold Mountain fault (14.0 km).**

Additional Information

Links for: USGS earthquake page, ShakeMap, DYFI, waveforms.
Visit our special reports page for further information on local notable earthquakes.
Visit scedc.caltech.edu to access any data recorded by the SCSN.

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

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

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

07/25/2022, M4.3 near El Sauzal

Zackary Newman — Mon, 25 Jul 2022 13:50:35 +0000

Event

25 Jul 2022 04:21:07 PDT, (31.907, -116.762), depth 16.7km.
7km W of El Sauzal, B.C., Mexico

Aftershocks

As of 25 Jul 2022, 06:42AM PDT, there have been 2 aftershocks recorded.
The largest was M1.8 (smallest M1.7).
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.

Possible Foreshocks

There were 1 events during the 3 days prior to the earthquake (within a 10 km radius).
The largest was M2.6 (2022/07/25).

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 M4.5 on 2022/04/15.
The most recent historic event was M4.5 on 15 Apr 2022.

Faults

Unknown Fault Zone.*

Additional Information

Links for: USGS earthquake page, ShakeMap, DYFI, waveforms.
Visit our special reports page for further information on local notable earthquakes.
Visit scedc.caltech.edu to access any data recorded by the SCSN.

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

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

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

05/26/2022, M4.3 near Trona

Zackary Newman — Thu, 26 May 2022 13:27:56 +0000

Event

26 May 2022 02:23:32 PDT, (35.605, -117.407), depth 5.3km.
18km S of Trona, California

Aftershocks

As of 26 May 2022, 06:21AM PDT, there have been 4 aftershocks recorded.
The largest was M1.5 (smallest M0.6).
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.

Possible Foreshocks

There were 3 events during the 3 days prior to the earthquake (within a 10 km radius).
The largest was M0.8 (2022/05/24).

Historical Seismicity

Since our records began in 1932 we’ve had 52 events of M4 or greater within 10km of today’s event.
The largest historic event was M6.4 on 2019/07/04.
The most recent historic event was M4.3 on 08 Jun 2020.

Faults

CFM fault associations: most likely Eastern Little Lake fault (93%). Alternates: Not associated with a CFM modeled fault (6%), Other CFM faults (1%).*
Nearby faults: Garlock fault zone, central Garlock section (5.1 km), Garlock fault zone, central Garlock section (Garlock fault) (9.3 km), Unnamed fault south of Straw Peak (10.7 km), Little Lake fault zone (13.5 km), Tank Canyon fault (14.7 km) and Browns Valley fault zone (15.0 km).**

Additional Information

Links for: USGS earthquake page, ShakeMap, DYFI, waveforms.
Visit our special reports page for further information on local notable earthquakes.
Visit scedc.caltech.edu to access any data recorded by the SCSN.

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

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

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

09/17/2021, M4.3 near Carson

Zackary Newman — Sat, 18 Sep 2021 03:39:27 +0000

Event

17 Sep 2021 19:58:34 PDT, (33.833, -118.267), depth 11.5km.
1km E of Carson, California

Aftershocks

As of 17 Sep 2021, 08:29PM PDT, there has been 1 aftershock recorded, M1.4.
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 M5.1 on 1941/11/14.
The most recent historic event was M4.0 on 05 Apr 2021.

Faults

CFM fault associations: most likely Not associated with a CFM modeled fault (49%). Alternates: Newport; Inglewood fault segment (29%), Other CFM faults (22%).*
Nearby faults: Newport-Inglewood-Rose Canyon fault zone, north Los Angeles basin section (4.3 km), Newport-Inglewood-Rose Canyon fault zone, South Los Angeles basin section (6.2 km), Palos Verdes fault zone, Palos Verdes Hills section (Palos Verdes Hills fault) (6.3 km), Palos Verdes fault zone, San Pedro shelf section (Palos Verdes fault) (9.2 km) and Cabrillo fault (onshore) (10.0 km).**

Additional Information

Links for: USGS earthquake page, ShakeMap, DYFI, waveforms.
Visit our special reports page for further information on local notable earthquakes.

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

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

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

03/22/2020, M4.3 near Searles Valley

Jennifer Andrews — Tue, 24 Mar 2020 19:43:28 +0000

Event

22 Mar 2020 22:53:57 PDT, (35.955, -117.363), depth 0.9km.
21km N of Searles Valley, California

Aftershocks

As of 24 Mar 2020, 12:33PM PDT, there have been 33 aftershocks recorded.
The largest was M2.5 (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.

Possible Foreshocks

There were 2 events during the 3 days prior to the earthquake (within a 10 km radius).
The largest was M1.0 (2020/03/20).

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 M4.8 on 1939/01/07.
The most recent historic event was M4.0 on 13 Dec 2008.

Faults

CFM fault associations: most likely Not associated with a CFM modeled fault (89%). Alternates: Ash Hill fault (10%), Other CFM faults (1%).*
Nearby faults: Ash Hill fault (5.8 km), unnamed faults on west side Slate Range (12.6 km), Panamint Valley fault zone, southern Panamint Valley section (13.9 km) and Wilson Canyon fault (15.1 km).**

Additional Information

Links for: USGS earthquake page, ShakeMap, DYFI, waveforms.
Visit our special reports page for further information on local notable earthquakes.

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

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

06/05/2019, Pair of M4.3 near San Clemente Is

Zackary Newman — Wed, 05 Jun 2019 13:35:25 +0000

Events

05 Jun 2019 03:47:18 PDT, (32.812, -118.492), depth 7.8km, 14km W of San Clemente Is.
05 Jun 2019 07:32:09 PDT, (32.813, -118.532), depth 7.8km, 17km W of San Clemente Is.

Aftershocks

As of 07 Jun 2019, 00:00AM PDT, there have been 7 aftershocks recorded. The largest was M3.5 (smallest M2.3).
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 4 events of M4 or greater within 10km of today’s event.
The largest historic event was M4.6 on 1952/02/13.
The most recent historic event was M4.1 on 10 Nov 2014.

Faults

Nearby faults: San Clemente fault zone (San Clemente fault) (11.9 km).**

Additional Information

Event 1 links for: USGS earthquake page, ShakeMap, DYFI, waveforms.
Event 2 links for: USGS earthquake page, ShakeMap, DYFI, waveforms.
Visit our special reports page for further information on local notable earthquakes.

Below are the waveform data associated with these events, as recorded in our Live Seismograms Feed. Note that the closest station to the epicenter captured in this stream is Long Beach CI.RPV at approximately 104km away.

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

10/26/2017, M4.3 near Lompoc

Jennifer Andrews — Thu, 26 Oct 2017 21:55:29 +0000

26 Oct 2017 13:38:51 PDT, (34.435, -120.670), depth 3.1km, 30km SW of Lompoc, California
Aftershocks: so far (26 Oct 2017, 02:52PM PDT) there have been 2 aftershocks recorded, the largest M2.1 (smallest M1.5). More 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 4 events of M4 or greater within 10km of today’s event, the largest was M4.7 (1959/10/01) and the most recent was M4.0 on 09 Jan 1989.
Nearby faults: Santa Lucia Bank fault zone (9.1 km).
Links for: USGS earthquake page, ShakeMap, DYFI, waveforms.
Visit our special reports page for further information on local notable earthquakes.

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

09/26/2016, M4.3 near Bombay Beach

Jennifer Andrews — Mon, 26 Sep 2016 15:18:21 +0000

These events are the largest so far in a swarm that started on 26 Sep 2016, 04:03AM PDT, and is occurring in the Brawley Seismic Zone near the southern terminus of the San Andreas Fault.

M4.3, 26 Sep 2016 07:31:08 PDT, (33.298, -115.713), depth 2.4km, 6km SSE of Bombay Beach, California
M4.3, 26 Sep 2016 20:23:58 PDT, (33.300, -115.712), depth 4.8km, 6km SSE of Bombay Beach, California
M4.1, 26 Sep 2016 20:36:15 PDT, (33.305, -115.702), depth 2.5km, 6km SSE of Bombay Beach, California

This swarm is noteworthy because it is happening near the southern terminus of the San Andreas Fault. This is the same are as the two previous swarms in this region, which occurred in 2009 and 2001. No swarms prior to 2001 with a M4.0 have been recorded in the area since 1933.
Events in the swarm show a NE-SW trend, consistent with the 2009 and 2001 swarms. This trend is in alignment with the faults located in the northern Brawley Seismic Zone, and orthogonal to the San Andreas fault. Before 2001, there were few events that had occurred in the northern Brawley Seismic Zone. The southern Brawley Seismic Zone is much more active, with events occurring on a regular basis. More information on the Brawley Seismic Zone and nearby faults can be found in the special report on the 2009 swarm.
The swarm includes more than 290 events so far (30 Sep 2016, 12:05PM PDT) in the magnitude range M0.7 to M4.3, there have been 17 events with magnitude greater than M3 and 97 events with magnitude greater than M2. The M4.3 exhibited strike-slip motion with one nodal plane at N47E, and the other sub-parallel to the strike of the San Andreas Fault. Relocations of these events show that the are located in the depth range 4 to 9 km.

The 2009 swarm had two large strike-slip events: M4.8 and M4.0.
The 2001 swarm had two large strike-slip events: M4.1 and M3.4.

Relocated events for the Sep 2016 Brawley swarm.

Relocated events for the Sep 2016 Brawley swarm shown with the swarms from 2001 and 2009.

Cumulative event rate for the Sep 2016 Brawley swarm.

There were 4 events during the 3 days prior to the earthquake (within a 1 km radius), the largest was M3.3 (2016/09/26).
Historical seismicity: since our records began in 1932 we’ve had 8 events of M4 or greater within 10km of today’s event, the largest was M4.8 (2009/03/24) and the most recent was M4.8 on 24 Mar 2009.
Nearby faults: Brawley Seismic Zone faults (orthogonal to San Andreas fault), San Andreas fault zone, Coachella section (5.8 km) and Hot Springs fault (10.3 km).
Links for: USGS earthquake page, ShakeMap, DYFI.
Visit our special reports page for further information on local notable earthquakes.