M3.5 Earthquake 85 km SSW of Unalaska, Alaska — September 14, 2022
2022-09-14 23:41:14 UTC (2022-09-14) · approx. 12:41 PM UTC-11 local
On September 14, 2022 at 23:41 UTC, a magnitude 3.5 shallow crustal earthquake struck 85 km SSW of Unalaska, Alaska, at a depth of 42.8 km and coordinates 53.1531°, -166.9662°.
Physical scale: An earthquake of magnitude 3.5 releases seismic energy equivalent to roughly 2.7 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 157 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-166.9662°E
Technical Information
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Common Questions
How strong was the magnitude 3.5 earthquake near Unalaska, Alaska?
The magnitude 3.5 earthquake that struck 85 km SSW of Unalaska, Alaska on September 14, 2022 at 23:41 UTC had a depth of 42.8 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 3.5 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.5 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000iu1n). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, September 14, 2022). M3.5 Earthquake 85 km SSW of Unalaska, Alaska — September 14, 2022. Retrieved November 19, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000iu1n/