SCSNBombay Beach – SCSN

03/18/2023, M3.6 near Bombay Beach

Zackary Newman — Sat, 18 Mar 2023 18:05:18 +0000

Event

18 Mar 2023 09:52:07 PDT, (33.247, -115.797), depth 8.0km.
13km SSW of Bombay Beach, California

Aftershocks

As of 18 Mar 2023, 10:50AM PDT, there has been 1 aftershock recorded, M3.4.
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 49 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 23 Aug 2021.

Faults

CFM fault associations: most likely Extra fault (90%). Alternates: Not associated with a CFM modeled fault (8%), Other CFM faults (2%).*
Nearby faults: San Andreas fault zone, Coachella section (13.0 km) and San Jacinto fault zone, Superstition Hills section (Kane Spring fault) (14.4 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.

*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.

09/20/2022, M3.5 near Bombay Beach

Zackary Newman — Tue, 20 Sep 2022 18:57:17 +0000

Event

20 Sep 2022 11:34:41 PDT, (33.362, -115.792), depth 3.0km.
6km WNW of Bombay Beach, California

Aftershocks

As of 20 Sep 2022, 11:54AM PDT, there has been 1 aftershock recorded, M2.6.
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 17 events of M4 or greater within 10km of today’s event.
The largest historic event was M4.8 on 2009/03/24.
The most recent historic event was M4.0 on 10 Aug 2020.

Faults

CFM fault associations: most likely Not associated with a CFM modeled fault (24%). Alternates: Southern San Andreas fault (23%), Other CFM faults (53%).*
Nearby faults: San Andreas fault zone, Coachella section (3.6 km) and Hot Springs fault (11.5 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.

08/10/2020, M4.6 near Bombay Beach

Zackary Newman — Mon, 10 Aug 2020 17:15:21 +0000

Event

10 Aug 2020 08:56:15 PDT, (33.247, -115.682), depth 10.8km.
12km SSE of Bombay Beach, California

Aftershocks

As of 10 Aug 2020, 10:16AM PDT, there have been 29 aftershocks recorded.
The largest was M4.0 (smallest M1.3).
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 6 events during the 3 days prior to the earthquake (within a 10 km radius).
The largest was M3.5 (2020/08/10).

Historical Seismicity

Since our records began in 1932 we’ve had 50 events of M4 or greater within 10km of today’s event.
The largest historic event was M5.8 on 1945/08/15.
The most recent historic event was M4.1 on 27 Sep 2016.
m4.8 2009/03/21
m4.3 2016/09/26

Faults

CFM fault association: Most Likely Elmore Ranch fault (68%).*
Nearby faults: Brawley Seismic Zone faults, , San Andreas fault zone, Coachella section (12.0 km) and Hot Springs fault (14.2 km).**

Additional Information

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

The events in this sequence are occurring to the south of the 2016, 2009, and 2001 events shown here. Updated graphics will be replaced once available.

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.

09/16/2019, M3.8 near Bombay Beach

Zackary Newman — Mon, 16 Sep 2019 18:49:03 +0000

Event

16 Sep 2019 11:11:51 PDT, (33.362, -115.788), depth 3.1km.
5km WNW of Bombay Beach, California

Aftershocks

As of 16 Sep 2019, 11:42AM 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.

Possible Foreshocks

There were 1 events during the 3 days prior to the earthquake (within a 10 km radius).
The largest was M1.8 (2019/09/16).

Historical Seismicity

Since our records began in 1932 we’ve had 15 events of M4 or greater within 10km of today’s event.
The largest historic event was M4.8 on 2009/03/24.
The most recent historic event was M4.1 on 27 Sep 2016.

Faults

CFM fault associations: most likely Southern San Andreas fault (35%). Alternates: Not associated with a CFM modeled fault (17%), Other CFM faults (48%).*
Nearby faults: San Andreas fault zone, Coachella section (3.3 km) and Hot Springs fault (11.2 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.The closest station to the epicenter visible in this feed is CI.WMD at 40km away.

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.

09/26/2016, 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.

12/17/2015, M3.6 near Bombay Beach

Zackary Newman — Fri, 18 Dec 2015 00:52:59 +0000

17 Dec 2015 16:21:00 PST, (33.257, -115.718), depth 3.5km, 10km S of Bombay Beach, California
Aftershocks: so far (22 Dec 2015) there have been 3 aftershocks recorded, the largest M1.9. 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 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.
Links for: USGS earthquake page, ShakeMap, DYFI.
Visit our special reports page for further information on local notable earthquakes.