M3.1 Earthquake 250 km W of Adak, Alaska — May 4, 2026
2026-05-04 17:16:27 UTC (1 day ago) · approx. 5:16 AM UTC+12 local
On May 4, 2026 at 17:16 UTC, a magnitude 3.1 intermediate depth earthquake struck 250 km W of Adak, Alaska, at a depth of 166.3 km and coordinates 51.9220°, 179.7230°.
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
179.7230°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.1 earthquake near Adak, Alaska?
The magnitude 3.1 earthquake that struck 250 km W of Adak, Alaska on May 4, 2026 at 17:16 UTC had a depth of 166.3 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.
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.
Actions
Understanding This Data
Magnitude 3.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: aka2026iungrd). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, May 4, 2026). M3.1 Earthquake 250 km W of Adak, Alaska — May 4, 2026. Retrieved May 5, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026iungrd/