M3.8 Earthquake 195 km WSW of Attu Station, Alaska — April 16, 2022
2022-04-16 19:43:07 UTC (2022-04-16) · approx. 6:43 AM UTC+11 local
On April 16, 2022 at 19:43 UTC, a magnitude 3.8 shallow crustal earthquake struck 195 km WSW of Attu Station, Alaska, at a depth of 10.0 km and coordinates 52.3135°, 170.4341°.
Physical scale: An earthquake of magnitude 3.8 releases seismic energy equivalent to roughly 7.6 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 252 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
170.4341°E
Technical Information
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Common Questions
How strong was the magnitude 3.8 earthquake near Attu Station, Alaska?
The magnitude 3.8 earthquake that struck 195 km WSW of Attu Station, Alaska on April 16, 2022 at 19:43 UTC had a depth of 10.0 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 3.8 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.8 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000hfc8). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, April 16, 2022). M3.8 Earthquake 195 km WSW of Attu Station, Alaska — April 16, 2022. Retrieved June 26, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000hfc8/