Event
- 16 Nov 2020 23:19:21 PST, (34.072, -116.722), depth 5.3km.
- 13km WNW of Morongo Valley, California
Aftershocks
- As of 17 Nov 2020, 08:07AM PST, there has been 1 aftershock recorded, M1.2.
- 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 M1.4 (2020/11/17).
Historical Seismicity
- Since our records began in 1932 we’ve had 65 events of M4 or greater within 10km of today’s event.
- The largest historic event was M6.3 on 1992/06/28.
- The most recent historic event was M4.5 on 08 May 2018.
Faults
- CFM fault associations: most likely Pinto Mountain fault (42%). Alternates: Not associated with a CFM modeled fault (4%), Other CFM faults (54%).*
- Nearby faults: Pinto Mountain fault zone (Pinto Mountain fault) (1.3 km), San Andreas fault zone, San Bernardino Mountains section (Mill Creek fault) (1.5 km), San Gorgonio Mountain fault (1.7 km), San Andreas fault zone, San Bernardino Mountains section (Mission Creek fault) (2.4 km), Santa Ana fault zone (Santa Ana fault) (8.0 km), San Andreas fault zone, San Bernardino Mountains section (10.5 km), Pinto Mountain fault zone (Morongo Valley fault) (11.0 km), San Andreas fault zone, San Bernardino Mountains section (Banning fault B) (12.4 km), San Andreas fault zone, San Bernardino Mountains section (Banning fault A) (12.7 km), San Gorgonio Pass fault zone (San Gorgonio Pass fault) (13.5 km), San Andreas fault zone, San Bernardino Mountains section (South Branch SAF) (13.6 km), San Andreas fault zone, San Bernardino Mountains section (Garnet Hill fault) (14.3 km), San Gorgonio Pass fault zone (14.7 km), San Andreas fault zone, San Bernardino Mountains section (Gandy Ranch fault) (14.8 km) and Pipes Canyon fault (15.7 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.
*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.
