M3.1 Earthquake 118 km E of Chignik, Alaska — May 13, 2022
2022-05-13 21:39:36 UTC (2022-05-13) · approx. 11:39 AM UTC-10 local
On May 13, 2022 at 21:39 UTC, a magnitude 3.1 shallow crustal earthquake struck 118 km E of Chignik, Alaska, at a depth of 45.6 km and coordinates 56.2684°, -156.4841°.
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
-156.4841°E
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Common Questions
How strong was the magnitude 3.1 earthquake near Chignik, Alaska?
The magnitude 3.1 earthquake that struck 118 km E of Chignik, Alaska on May 13, 2022 at 21:39 UTC had a depth of 45.6 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: ak02264b7p4j). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, May 13, 2022). M3.1 Earthquake 118 km E of Chignik, Alaska — May 13, 2022. Retrieved July 22, 2022 from https://www.earthquaketracker.org/earthquakes/event/ak02264b7p4j/