1965 Rat Islands earthquake

The underthrusting earthquake of 4 February 1965, recorded at 05:01 UTC and 19:01 on 3 February local time, ruptured a 600 km segment of the western end of the Aleutian Islands. It was followed on 30 March 1965 by a large tensional outer-rise event of Ms 7.5, located oceanward of the largest moment release on the mainshock rupture. The boundary involved is the Alaska-Aleutian megathrust, where the Pacific Plate subducts beneath the North American Plate.

Origin time (UTC)

1965-02-04T05:01

Magnitude

8.7

Magnitude type

mw

Depth (km)

30.3

USGS event page

earthquake.usgs.gov/earthquakes/eventpage/official19650204050122_30

Category: Disasters & Incidents

Tags: megathrust, aleutians, rat-islands, alaska, subduction

Coordinates: 51.251, 178.715

Part of Earthquakes of magnitude 8.5 and above since 1900

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