M3.0 Earthquake 92 km SW of Unalaska, Alaska — March 31, 2023
2023-03-31 19:19:17 UTC (2023-03-31) · approx. 8:19 AM UTC-11 local
On March 31, 2023 at 19:19 UTC, a magnitude 3.0 intermediate depth earthquake struck 92 km SW of Unalaska, Alaska, at a depth of 93.6 km and coordinates 53.3045°, -167.5592°.
Physical scale: An earthquake of magnitude 3.0 releases seismic energy equivalent to roughly 477 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 71 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-167.5592°E
Technical Information
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Common Questions
How strong was the magnitude 3.0 earthquake near Unalaska, Alaska?
The magnitude 3.0 earthquake that struck 92 km SW of Unalaska, Alaska on March 31, 2023 at 19:19 UTC had a depth of 93.6 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 3.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.0 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000k2gm). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, March 31, 2023). M3.0 Earthquake 92 km SW of Unalaska, Alaska — March 31, 2023. Retrieved June 3, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000k2gm/