Minor M 3.8 Earthquake Strikes Deep Below South of Platinum, Alaska

What Happened

A minor earthquake with a magnitude of 3.8 ml occurred on March 11, 2026, at 03:35:58 UTC. The seismic event was centered approximately 167 km south of Platinum, Alaska. Based on its magnitude, this is classified as a minor earthquake, which is a routine geological event in this region.

Location Details

The earthquake’s epicenter was located at coordinates 57.523°N and 161.478°W, approximately 167 km south of Platinum. A notable feature of this event was its depth; the earthquake originated 395.3 km below the surface. In seismology, earthquakes occurring at depths greater than 70 km are classified as deep. At nearly 400 km, this is considered a very deep earthquake, which typically significantly reduces the intensity of shaking felt at the surface.

Impact Assessment

According to the USGS data, there have been no felt reports submitted by the public for this event. There is no tsunami advisory, watch, or warning in effect. No alert level color has been assigned to this event, and there are no reports of damage or injuries.

What You Should Know

Earthquakes with magnitudes between 2.5 and 3.9 are common and are often felt but rarely cause damage. Because this specific event occurred at such a great depth, it is even less likely to have been noticed by residents on the surface. While aftershocks are a possibility following seismic activity, they are generally smaller than the initial event.

Source

Information provided by the USGS Earthquake Hazards Program.