M3.6 Earthquake 77 km NW of Atka, Alaska — October 28, 2022
2022-10-28 23:46:57 UTC (2022-10-28) · approx. 11:46 AM UTC-12 local
On October 28, 2022 at 23:46 UTC, a magnitude 3.6 shallow crustal earthquake struck 77 km NW of Atka, Alaska, at a depth of 10.2 km and coordinates 52.6375°, -175.0771°.
Physical scale: An earthquake of magnitude 3.6 releases seismic energy equivalent to roughly 3.8 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 184 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-175.0771°E
Technical Information
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Common Questions
How strong was the magnitude 3.6 earthquake near Atka, Alaska?
The magnitude 3.6 earthquake that struck 77 km NW of Atka, Alaska on October 28, 2022 at 23:46 UTC had a depth of 10.2 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 3.6 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.6 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000im0i). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, October 28, 2022). M3.6 Earthquake 77 km NW of Atka, Alaska — October 28, 2022. Retrieved January 3, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000im0i/