M5.5 Earthquake Recorded Near Alaska Peninsula

GEOFON GFZ reports M5.5 near Alaska Peninsula, with a 82.9 km catalog depth.

Published 2026-10-06T18:50:50.360Z · Updated 2026-10-07T13:30:53.238Z

Update: the reporting agency revised this event's catalog depth from 83.2 km to 82.9 km.

The event began at Tue, 06 Oct 2026 18:34:31 GMT. GEOFON GFZ reports magnitude 5.5, 82.9 km catalog depth, and coordinates 58.991, -154.034.

The catalog location label is Alaska Peninsula; no separate nearest-city field was supplied with this solution. By catalog depth, this is an intermediate-depth event. The magnitude-derived energy estimate is 1.29e+13 joules, or about 3,079 tons of TNT equivalent; that calculation describes source energy, not local damage.

The current catalog entry does not include a public felt-report count. No separate intensity or catalog-significance detail is available from this provider record. No official casualty or damage statement is attached to the normalized event evidence.

GEOFON GFZ has not supplied a review status in the normalized record. No station-count, phase-count, residual, gap, or uncertainty fields were supplied in the normalized record. No alternate network solution is attached to this record.

The provider record does not carry a tsunami flag at publication time. Magnitude, depth, and location can change as monitoring networks add observations and review the solution.