M3.1 Earthquake 85 km NNW of Karluk, Alaska — September 9, 2022
2022-09-09 18:24:12 UTC (2022-09-09) · approx. 8:24 AM UTC-10 local
On September 9, 2022 at 18:24 UTC, a magnitude 3.1 intermediate depth earthquake struck 85 km NNW of Karluk, Alaska, at a depth of 99.9 km and coordinates 58.2660°, -155.0561°.
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
-155.0561°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Karluk, Alaska?
The magnitude 3.1 earthquake that struck 85 km NNW of Karluk, Alaska on September 9, 2022 at 18:24 UTC had a depth of 99.9 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: ak022bl2afgz). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, September 9, 2022). M3.1 Earthquake 85 km NNW of Karluk, Alaska — September 9, 2022. Retrieved November 15, 2022 from https://www.earthquaketracker.org/earthquakes/event/ak022bl2afgz/