M3.4 Earthquake 96 km SSW of Atka, Alaska — July 31, 2022
2022-07-31 19:36:52 UTC (2022-07-31) · approx. 7:36 AM UTC-12 local
On July 31, 2022 at 19:36 UTC, a magnitude 3.4 shallow crustal earthquake struck 96 km SSW of Atka, Alaska, at a depth of 12.4 km and coordinates 51.3685°, -174.6386°.
Physical scale: An earthquake of magnitude 3.4 releases seismic energy equivalent to roughly 1.9 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 134 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-174.6386°E
Technical Information
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Common Questions
How strong was the magnitude 3.4 earthquake near Atka, Alaska?
The magnitude 3.4 earthquake that struck 96 km SSW of Atka, Alaska on July 31, 2022 at 19:36 UTC had a depth of 12.4 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 3.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.4 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000i84y). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, July 31, 2022). M3.4 Earthquake 96 km SSW of Atka, Alaska — July 31, 2022. Retrieved October 12, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000i84y/