M3.7 Earthquake 236 km ESE of Attu Station, Alaska — May 18, 2026
2026-05-18 21:07:40 UTC (2026-05-18) · approx. 9:07 AM UTC+12 local
On May 18, 2026 at 21:07 UTC, a magnitude 3.7 shallow crustal earthquake struck 236 km ESE of Attu Station, Alaska, at a depth of 53.8 km and coordinates 52.0150°, 176.3934°.
Physical scale: An earthquake of magnitude 3.7 releases seismic energy equivalent to roughly 5.4 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 215 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
176.3934°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.7 earthquake near Attu Station, Alaska?
The magnitude 3.7 earthquake that struck 236 km ESE of Attu Station, Alaska on May 18, 2026 at 21:07 UTC had a depth of 53.8 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 3.7 earthquakes can continue for several days and gradually diminish over time.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
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Understanding This Data
Magnitude 3.7 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000ssed). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, May 18, 2026). M3.7 Earthquake 236 km ESE of Attu Station, Alaska — May 18, 2026. Retrieved June 18, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000ssed/