M3.1 Earthquake 19 km E of Sand Point, Alaska — October 25, 2020
2020-10-25 23:19:17 UTC (2020-10-25) · approx. 12:19 PM UTC-11 local
On October 25, 2020 at 23:19 UTC, a magnitude 3.1 shallow crustal earthquake struck 19 km E of Sand Point, Alaska, at a depth of 62.8 km and coordinates 55.3176°, -160.2011°.
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
-160.2011°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Sand Point, Alaska?
The magnitude 3.1 earthquake that struck 19 km E of Sand Point, Alaska on October 25, 2020 at 23:19 UTC had a depth of 62.8 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: us7000c9vt). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, October 25, 2020). M3.1 Earthquake 19 km E of Sand Point, Alaska — October 25, 2020. Retrieved January 9, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000c9vt/