M 5.4 Moderate Earthquake Strikes Near Attu Station, Alaska

What Happened

A moderate earthquake with a magnitude of 5.4 (mww) was recorded in the Aleutian Islands region on March 19, 2026, at 13:26:59 UTC (04:26:59 AM local time). The seismic event occurred at a shallow depth of 10 kilometers.

Location Details

The earthquake’s epicenter was located at coordinates 52.2374°N and 176.3148°E, approximately 222 km east-southeast of Attu Station, Alaska. The depth of 10 km is classified as shallow; earthquakes occurring at depths of less than 20 km are typically felt more strongly at the surface than deeper events.

Impact Assessment

The United States Geological Survey (USGS) has issued a “green” alert level for this event, indicating a low likelihood of casualties and damage. The Modified Mercalli Intensity (MMI) was measured at 4.32. According to the source data, a tsunami advisory flag (status 1) was associated with this event. No individual felt reports have been officially recorded at this time.

What You Should Know

A magnitude 5.4 earthquake is considered a “moderate” event. While such earthquakes can cause damage to poorly constructed buildings, they typically result in light damage to well-built structures. Residents in the region should remain aware of the possibility of aftershocks, which are routine following an event of this size.

Source

Information and data provided by the USGS Earthquake Hazards Program.