M3.5 Earthquake 183 km NNW of Diomede, Alaska — August 25, 2021
2021-08-25 23:32:27 UTC (2021-08-25) · approx. 12:32 PM UTC-11 local
On August 25, 2021 at 23:32 UTC, a magnitude 3.5 shallow crustal earthquake struck 183 km NNW of Diomede, Alaska, at a depth of 10.0 km and coordinates 67.2661°, -170.6066°.
Physical scale: An earthquake of magnitude 3.5 releases seismic energy equivalent to roughly 2.7 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 157 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-170.6066°E
Technical Information
Common Questions
How strong was the magnitude 3.5 earthquake near Diomede, Alaska?
The magnitude 3.5 earthquake that struck 183 km NNW of Diomede, Alaska on August 25, 2021 at 23:32 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 3.5 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.5 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000f3xq). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, August 25, 2021). M3.5 Earthquake 183 km NNW of Diomede, Alaska — August 25, 2021. Retrieved November 2, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000f3xq/