M3.1 Earthquake 64 km SSE of Unalaska, Alaska — July 30, 2022
2022-07-30 16:57:51 UTC (2022-07-30) · approx. 5:57 AM UTC-11 local
On July 30, 2022 at 16:57 UTC, a magnitude 3.1 shallow crustal earthquake struck 64 km SSE of Unalaska, Alaska, at a depth of 48.1 km and coordinates 53.3274°, -166.2083°.
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
-166.2083°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Unalaska, Alaska?
The magnitude 3.1 earthquake that struck 64 km SSE of Unalaska, Alaska on July 30, 2022 at 16:57 UTC had a depth of 48.1 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: us6000i6t3). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, July 30, 2022). M3.1 Earthquake 64 km SSE of Unalaska, Alaska — July 30, 2022. Retrieved October 12, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000i6t3/