M3.1 Earthquake near Andreanof Islands, Aleutian Islands, Alaska — April 12, 2023
2023-04-12 22:17:51 UTC (2023-04-12) · approx. 10:17 AM UTC-12 local
On April 12, 2023 at 22:17 UTC, a magnitude 3.1 intermediate depth earthquake struck near Andreanof Islands, Aleutian Islands, Alaska, at a depth of 109.2 km and coordinates 52.0461°, -175.4716°.
Physical scale: An earthquake of magnitude 3.1 releases seismic energy equivalent to roughly 674 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 83 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-175.4716°E
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Common Questions
How strong was the magnitude 3.1 earthquake near Andreanof Islands, Aleutian Islands, Alaska?
The magnitude 3.1 earthquake that struck near Andreanof Islands, Aleutian Islands, Alaska on April 12, 2023 at 22:17 UTC had a depth of 109.2 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 3.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000k5dt). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, April 12, 2023). M3.1 Earthquake near Andreanof Islands, Aleutian Islands, Alaska — April 12, 2023. Retrieved June 17, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000k5dt/