M3.3 Earthquake 73 km W of Karluk, Alaska — December 31, 2025
2025-12-31 22:08:01 UTC (2025-12-31) · approx. 12:08 PM UTC-10 local
On December 31, 2025 at 22:08 UTC, a magnitude 3.3 intermediate depth earthquake struck 73 km W of Karluk, Alaska, at a depth of 87.4 km and coordinates 57.7020°, -155.6600°.
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
-155.6600°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.3 earthquake near Karluk, Alaska?
The magnitude 3.3 earthquake that struck 73 km W of Karluk, Alaska on December 31, 2025 at 22:08 UTC had a depth of 87.4 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.
Actions
Understanding This Data
Magnitude 3.3 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak2025ztwikm). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, December 31, 2025). M3.3 Earthquake 73 km W of Karluk, Alaska — December 31, 2025. Retrieved May 16, 2026 from https://www.earthquaketracker.org/earthquakes/event/ak2025ztwikm/