M3.2 Earthquake 48 km SSE of Adak, Alaska — November 19, 2021
2021-11-19 20:41:49 UTC (2021-11-19) · approx. 8:41 AM UTC-12 local
On November 19, 2021 at 20:41 UTC, a magnitude 3.2 shallow crustal earthquake struck 48 km SSE of Adak, Alaska, at a depth of 42.4 km and coordinates 51.4883°, -176.3097°.
Physical scale: An earthquake of magnitude 3.2 releases seismic energy equivalent to roughly 951 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 97 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-176.3097°E
Technical Information
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Common Questions
How strong was the magnitude 3.2 earthquake near Adak, Alaska?
The magnitude 3.2 earthquake that struck 48 km SSE of Adak, Alaska on November 19, 2021 at 20:41 UTC had a depth of 42.4 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 3.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.2 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000g8vz). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, November 19, 2021). M3.2 Earthquake 48 km SSE of Adak, Alaska — November 19, 2021. Retrieved January 29, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000g8vz/