M3.8 Earthquake 249 km S of Savoonga, Alaska — August 11, 2020
2020-08-11 18:38:04 UTC (2020-08-11) · approx. 7:38 AM UTC-11 local
On August 11, 2020 at 18:38 UTC, a magnitude 3.8 shallow crustal earthquake struck 249 km S of Savoonga, Alaska, at a depth of 10.0 km and coordinates 61.5002°, -171.4121°.
Physical scale: An earthquake of magnitude 3.8 releases seismic energy equivalent to roughly 7.6 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 252 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-171.4121°E
Technical Information
Common Questions
How strong was the magnitude 3.8 earthquake near Savoonga, Alaska?
The magnitude 3.8 earthquake that struck 249 km S of Savoonga, Alaska on August 11, 2020 at 18:38 UTC had a depth of 10.0 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 3.8 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.8 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000bct2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, August 11, 2020). M3.8 Earthquake 249 km S of Savoonga, Alaska — August 11, 2020. Retrieved October 21, 2020 from https://www.earthquaketracker.org/earthquakes/event/us6000bct2/