M3.0 Earthquake 37 km NNW of Atka, Alaska — July 27, 2022
2022-07-27 20:28:55 UTC (2022-07-27) · approx. 8:28 AM UTC-12 local
On July 27, 2022 at 20:28 UTC, a magnitude 3.0 intermediate depth earthquake struck 37 km NNW of Atka, Alaska, at a depth of 160.4 km and coordinates 52.4846°, -174.4754°.
Physical scale: An earthquake of magnitude 3.0 releases seismic energy equivalent to roughly 477 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 71 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-174.4754°E
Technical Information
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Common Questions
How strong was the magnitude 3.0 earthquake near Atka, Alaska?
The magnitude 3.0 earthquake that struck 37 km NNW of Atka, Alaska on July 27, 2022 at 20:28 UTC had a depth of 160.4 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 3.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.0 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000i7jr). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, July 27, 2022). M3.0 Earthquake 37 km NNW of Atka, Alaska — July 27, 2022. Retrieved October 1, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000i7jr/