SCSNSan Clemente Is – SCSN

10/20/2024, M3.6 near San Clemente Is

Zackary Newman — Mon, 21 Oct 2024 15:07:31 +0000

Event

20 Oct 2024 17:32:11 PDT, (33.060, -117.973), depth 5.8km.
44km NE of San Clemente Is.

Aftershocks

As of 21 Oct 2024, 07:54AM 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 2 events during the 3 days prior to the earthquake (within a 10 km radius).
The largest was M3.2 (2024/10/20).

Historical Seismicity

Since our records began in 1932 we’ve had 13 events of M4 or greater within 10km of today’s event.
The largest historic event was M5.5 on 1986/07/13.
The most recent historic event was M4.1 on 20 Jun 2009.

Faults

CFM fault associations: Thirty Mile Bank detachment; upper segment (53%).*
Nearby faults: San Diego Trough fault zone (5.9 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.

01/15/2024, M4.4 near San Clemente Is

Zackary Newman — Mon, 15 Jan 2024 14:54:32 +0000

Event

15 Jan 2024 02:44:10 PST, (32.463, -118.288), depth 5.9km.
40km S of San Clemente Is.

Aftershocks

As of 05 Feb 2024, 11:53AM PST, 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 5 events of M4 or greater within 10km of today’s event.
The largest historic event was M5.0 on 2005/10/16.
The most recent historic event was M4.3 on 19 Oct 2005.

Faults

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.

08/29/2023, M3.6 near San Clemente Is

Zackary Newman — Tue, 29 Aug 2023 14:13:58 +0000

Event

29 Aug 2023 01:05:33 PDT, (33.002, -117.918), depth 6.0km.
45km ENE of San Clemente Is.

Aftershocks

As of 29 Aug 2023, 07:08AM PDT, there have been 2 aftershocks recorded.
The largest was M1.6 (smallest M1.5).
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 14 events of M4 or greater within 10km of today’s event.
The largest historic event was M5.5 on 1986/07/13.
The most recent historic event was M4.1 on 20 Jun 2009.

Faults

CFM fault associations: most likely Not associated with a CFM modeled fault (57%). Alternates: San Diego Trough fault; LEGG segment (42%), Other CFM faults (1%).*
Nearby faults: San Diego Trough fault zone (4.1 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.

10/20/2022, M3.8 near San Clemente Is

Zackary Newman — Thu, 20 Oct 2022 18:31:38 +0000

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.

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.

07/13/2022, M3.6 near San Clemente Is

Zackary Newman — Wed, 13 Jul 2022 13:45:30 +0000

Event

13 Jul 2022 03:28:27 PDT, (32.498, -118.240), depth 5.9km.
37km SSE of San Clemente Is.

Aftershocks

As of 13 Jul 2022, 06:40AM 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 7 events of M4 or greater within 10km of today’s event.
The largest historic event was M5.0 on 2005/10/16.
The most recent historic event was M4.3 on 19 Oct 2005.

Faults

Nearby faults: San Clemente fault zone (San Clemente fault) (16.9 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.

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.

05/01/2018, M3.7 near San Clemente Is

Jennifer Andrews — Tue, 01 May 2018 11:48:01 +0000

01 May 2018 04:22:22 PDT, (32.787, -118.443), depth 8.0km, 10km WSW of San Clemente Is.
Aftershocks: so far (01 May 2018, 07:20AM PDT) there have been 3 aftershocks recorded, the largest M3.4 (smallest M2.8). 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 M5.8 (1951/12/26) and the most recent was M4.2 on 16 Aug 2001.
Nearby faults: San Clemente fault zone (San Clemente fault) (11.0 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 Li
ve Seismograms Feed.The closest station to the earthquake shown in the view is CI.RPV in Long Beach at approximately 106km.

10/24/2017, M3.9 near San Clemente Is

Zackary Newman — Tue, 24 Oct 2017 13:40:59 +0000

24 Oct 2017 00:00:51 PDT, (33.173, -118.722), depth 4.8km (fixed), 19km NW of San Clemente Is.
Aftershocks: so far there have been no aftershocks recorded. Some 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 1 events of M4 or greater within 10km of today’s event, the largest and most recent was M4.1 on 21 Oct 1932.
Nearby faults: San Clemente fault zone (San Clemente fault) (3.5 km) and Santa Cruz_Santa Catalina Ridge fault zone (21.7 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. The closest stations represented in this display are CI.RPV and CI.DJJ at 70km and 107km away from the epicenter.