M3.8 Earthquake 259 km W of Adak, Alaska — December 13, 2022
2022-12-13 21:45:02 UTC (2022-12-13) · approx. 9:45 AM UTC+12 local
On December 13, 2022 at 21:45 UTC, a magnitude 3.8 intermediate depth earthquake struck 259 km W of Adak, Alaska, at a depth of 191.9 km and coordinates 51.9631°, 179.6033°.
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
179.6033°E
Technical Information
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Common Questions
How strong was the magnitude 3.8 earthquake near Adak, Alaska?
The magnitude 3.8 earthquake that struck 259 km W of Adak, Alaska on December 13, 2022 at 21:45 UTC had a depth of 191.9 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: us6000j9rv). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, December 13, 2022). M3.8 Earthquake 259 km W of Adak, Alaska — December 13, 2022. Retrieved February 18, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000j9rv/