Event
- 30 Nov 2023 23:43:27 PST, (32.752, -115.873), depth 8.7km.
- 11km E of Ocotillo, California
Aftershocks
- As of 04 Dec 2023, 10:41AM PST, there have been 57 aftershocks recorded.
- The largest was M3.3 (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 4 events during the 3 days prior to the earthquake (within a 10 km radius).
- The largest was M3.2 (2023/12/01).
Historical Seismicity
- Since our records began in 1932 we’ve had 55 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 M4.0 on 22 May 2012.
Faults
- CFM fault associations: most likely Yuha Well fault (26%). Alternates: Other CFM faults (74%).*
- Nearby faults: Yuha Wells fault (0.4 km), Elsinore fault zone, Laguna Salada section (Laguna Salada fault) (5.7 km), Elsinore fault zone, Laguna Salada section (6.4 km), unnamed faults north of Coyote Wash (9.7 km), Elsinore fault zone, Coyote Mountain section (Elsinore fault) (14.1 km) and unnamed faults in Davies Valley (14.9 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.
