M3.3 Earthquake 56 km SE of Unalaska, Alaska — June 17, 2026
2026-06-17 05:55:25 UTC (1 day ago) · approx. 6:55 PM UTC-11 local
On June 17, 2026 at 05:55 UTC, a magnitude 3.3 shallow crustal earthquake struck 56 km SE of Unalaska, Alaska, at a depth of 25.5 km and coordinates 53.4650°, -166.0380°.
Physical scale: An earthquake of magnitude 3.3 releases seismic energy equivalent to roughly 1.3 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 114 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-166.0380°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.3 earthquake near Unalaska, Alaska?
The magnitude 3.3 earthquake that struck 56 km SE of Unalaska, Alaska on June 17, 2026 at 05:55 UTC had a depth of 25.5 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 3.3 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 3.3 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: aka2026lwxnbn). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, June 17, 2026). M3.3 Earthquake 56 km SE of Unalaska, Alaska — June 17, 2026. Retrieved June 18, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026lwxnbn/