M2.9 Earthquake 4km ESE of Westmorland, CA — October 3, 2020
2020-10-03 20:21:00 UTC (2020-10-03) · approx. 12:21 PM UTC-8 local
On October 3, 2020 at 20:21 UTC, a magnitude 2.9 shallow crustal earthquake struck 4km ESE of Westmorland, CA, at a depth of 11.3 km and coordinates 33.0202°, -115.5872°.
Physical scale: An earthquake of magnitude 2.9 releases seismic energy equivalent to roughly 388 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 64 m — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 6 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-115.5872°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 2.9 earthquake near Westmorland, CA?
The magnitude 2.9 earthquake that struck 4km ESE of Westmorland, CA on October 3, 2020 at 20:21 UTC had a depth of 11.3 km. For context, this was a minor earthquake typically detected only by instruments.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 2.9 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 2.9 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ci39651720). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, October 3, 2020). M2.9 Earthquake 4km ESE of Westmorland, CA — October 3, 2020. Retrieved December 12, 2020 from https://www.earthquaketracker.org/earthquakes/event/ci39651720/