Moderate M5.5 earthquake strikes near Aleneva, Alaska

An earthquake measuring M5.5 occurred at 18:34 UTC on October 6, 2026, about 92 km (57 miles) north-northwest of Aleneva, Alaska. The event was registered at a depth of 87.6 km (54.5 miles), according to the USGS.

The coordinates for the epicenter were 58.8°N, 153.6°W, positioning the event in a sparsely populated region near Kodiak Island in southern Alaska. Aleneva is a remote settlement, and the surrounding area consists primarily of rugged coastline, small communities, and forested terrain.

Given the location, the nearby infrastructure likely includes regional airstrips, small ports, and local transportation routes connecting remote communities. There are limited major highways or large energy installations in this area.

There is no tsunami threat associated with this earthquake, based on its location and available data.

The maximum estimated intensity for this event was IV (four), and 22 felt reports were received. The significance index is 473 (on a scale that runs through 1 000), based on magnitude, felt reports, and estimated impact.

Southern Alaska sits along the active boundary between the Pacific and North American tectonic plates, a region known for frequent seismicity and large earthquake events, especially near the Aleutian Trench.

This information was last updated at 18:45 UTC on October 6, 2026.