M3.3 Earthquake 118 km NNE of Arctic Village, Alaska — September 28, 2023
2023-09-28 21:08:30 UTC (2023-09-28) · approx. 11:08 AM UTC-10 local
On September 28, 2023 at 21:08 UTC, a magnitude 3.3 shallow crustal earthquake struck 118 km NNE of Arctic Village, Alaska, at a depth of 14.2 km and coordinates 69.1322°, -144.6262°.
Physical scale: An earthquake of magnitude 3.3 releases seismic energy equivalent to roughly 1.3 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 114 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-144.6262°E
Technical Information
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Common Questions
How strong was the magnitude 3.3 earthquake near Arctic Village, Alaska?
The magnitude 3.3 earthquake that struck 118 km NNE of Arctic Village, Alaska on September 28, 2023 at 21:08 UTC had a depth of 14.2 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 3.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.3 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak023cgj6xr5). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, September 28, 2023). M3.3 Earthquake 118 km NNE of Arctic Village, Alaska — September 28, 2023. Retrieved December 9, 2023 from https://www.earthquaketracker.org/earthquakes/event/ak023cgj6xr5/