M3.0 Earthquake 24 km WSW of Westmorland, CA — May 21, 2026
2026-05-21 15:39:15 UTC (2026-05-21) · approx. 7:39 AM UTC-8 local
On May 21, 2026 at 15:39 UTC, a magnitude 3.0 shallow crustal earthquake struck 24 km WSW of Westmorland, CA, at a depth of 14.6 km and coordinates 32.9593°, -115.8570°.
Physical scale: An earthquake of magnitude 3.0 releases seismic energy equivalent to roughly 511 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 73 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 9 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
-115.8570°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.0 earthquake near Westmorland, CA?
The magnitude 3.0 earthquake that struck 24 km WSW of Westmorland, CA on May 21, 2026 at 15:39 UTC had a depth of 14.6 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 3.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.0 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ci41471624). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, May 21, 2026). M3.0 Earthquake 24 km WSW of Westmorland, CA — May 21, 2026. Retrieved June 14, 2026 from https://www.earthquaketracker.org/earthquakes/event/ci41471624/