M3.1 Earthquake 117 km SSW of Sand Point, Alaska — October 22, 2024
2024-10-22 21:49:23 UTC (2024-10-22) · approx. 10:49 AM UTC-11 local
On October 22, 2024 at 21:49 UTC, a magnitude 3.1 shallow crustal earthquake struck 117 km SSW of Sand Point, Alaska, at a depth of 7.2 km and coordinates 54.3204°, -160.9938°.
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
-160.9938°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 117 km SSW of Sand Point, Alaska on October 22, 2024 at 21:49 UTC had a depth of 7.2 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: us7000nvga). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, October 22, 2024). M3.1 Earthquake 117 km SSW of Sand Point, Alaska — October 22, 2024. Retrieved January 4, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000nvga/