M3.3 Earthquake 217 km W of Ferndale, California — August 2, 2020
2020-08-02 20:21:39 UTC (2020-08-02) · approx. 12:21 PM UTC-8 local
On August 2, 2020 at 20:21 UTC, a magnitude 3.3 shallow crustal earthquake struck 217 km W of Ferndale, California, at a depth of 8.8 km and coordinates 40.5238°, -126.8263°.
Physical scale: An earthquake of magnitude 3.3 releases seismic energy equivalent to roughly 1.3 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 114 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-126.8263°E
Technical Information
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Common Questions
How strong was the magnitude 3.3 earthquake near Ferndale, California?
The magnitude 3.3 earthquake that struck 217 km W of Ferndale, California on August 2, 2020 at 20:21 UTC had a depth of 8.8 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 3.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.3 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000b8er). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, August 2, 2020). M3.3 Earthquake 217 km W of Ferndale, California — August 2, 2020. Retrieved October 10, 2020 from https://www.earthquaketracker.org/earthquakes/event/us6000b8er/