M4.4 Earthquake 210 km W of Attu Station, Alaska — May 14, 2021
2021-05-14 23:26:13 UTC (2021-05-14) · approx. 10:26 AM UTC+11 local
On May 14, 2021 at 23:26 UTC, a magnitude 4.4 shallow crustal earthquake struck 210 km W of Attu Station, Alaska, at a depth of 10.0 km and coordinates 53.1244°, 170.0898°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
170.0898°E
Technical Information
Common Questions
How strong was the magnitude 4.4 earthquake near Attu Station, Alaska?
The magnitude 4.4 earthquake that struck 210 km W of Attu Station, Alaska on May 14, 2021 at 23:26 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000e38m). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, May 14, 2021). M4.4 Earthquake 210 km W of Attu Station, Alaska — May 14, 2021. Retrieved July 24, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000e38m/