M3.7 Earthquake 67 km WSW of Adak, Alaska — January 29, 2023
2023-01-29 20:00:40 UTC (2023-01-29) · approx. 8:00 AM UTC-12 local
On January 29, 2023 at 20:00 UTC, a magnitude 3.7 intermediate depth earthquake struck 67 km WSW of Adak, Alaska, at a depth of 75.9 km and coordinates 51.6591°, -177.5413°.
Physical scale: An earthquake of magnitude 3.7 releases seismic energy equivalent to roughly 5.4 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 215 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-177.5413°E
Technical Information
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Common Questions
How strong was the magnitude 3.7 earthquake near Adak, Alaska?
The magnitude 3.7 earthquake that struck 67 km WSW of Adak, Alaska on January 29, 2023 at 20:00 UTC had a depth of 75.9 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 3.7 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.7 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000jmv1). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, January 29, 2023). M3.7 Earthquake 67 km WSW of Adak, Alaska — January 29, 2023. Retrieved April 13, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000jmv1/