Alaska earthquakes

M7.9 earthquake 77 km WSW of Adak, Alaska

A magnitude 7.9 earthquake struck 77 km WSW of Adak, Alaska on Sun, Jun 9, 1996, 7:03 PM HADT (04:03 UTC), 33 km (21 mi) below the surface.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 7.9 (mwc), major
Local time: Sun, Jun 9, 1996, 7:03 PM HADT
UTC: 1996-06-10 04:03:35 UTC
Depth: 33.0 km (20.5 mi), shallow
Epicenter: 51.564° N, 177.632° W
Region: Alaska
Strongest shaking: VII, very strong shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: VII, very strong shaking
Peak ground acceleration: 30.8% of gravity
Peak ground velocity: 3.5 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

No one has reported feeling this quake to the USGS.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Reverse (thrust)
Moment magnitude: 7.8 Mww
Nodal plane 1: Strike 256°, dip 21°, rake 101°
Nodal plane 2: Strike 63°, dip 69°, rake 85°

How well it is located

Reviewed by a seismologist.

Depth from: OPERATOR_ASSIGNED

Nearby

Within 100 km, magnitude 2.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0007jcu (also filed as choy19960610040335, gcmtm061096b, gcmt19960610040335, duputel061096b, ak9967fzgob5, iscgem968623, atlas19960610040336). Read Tue, Sep 22, 2026, 12:13 PM UTC.