M3.2 Earthquake near Gulf of Alaska — September 7, 2021
2021-09-07 18:08:44 UTC (2021-09-07) · approx. 8:08 AM UTC-10 local
On September 7, 2021 at 18:08 UTC, a magnitude 3.2 shallow crustal earthquake struck near Gulf of Alaska, at a depth of 10.0 km and coordinates 56.1401°, -149.3057°.
Physical scale: An earthquake of magnitude 3.2 releases seismic energy equivalent to roughly 951 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 97 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-149.3057°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.2 earthquake near Gulf of Alaska?
The magnitude 3.2 earthquake that struck near Gulf of Alaska on September 7, 2021 at 18:08 UTC had a depth of 10.0 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 3.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.2 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000f8zr). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, September 7, 2021). M3.2 Earthquake near Gulf of Alaska — September 7, 2021. Retrieved November 17, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000f8zr/