Alaska earthquakes

M7.3 earthquake 46 km SSW of Adak, Alaska

A magnitude 7.3 earthquake struck 46 km SSW of Adak, Alaska on Mon, Jun 10, 1996, 6:24 AM HADT (15:24 UTC), 26 km (16 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: 7.3 (Mwc, centroid moment), major
Magnitude from: USGS National Earthquake Information Center
Local time: Mon, Jun 10, 1996, 6:24 AM HADT
UTC: 1996-06-10 15:24:56 UTC
Depth: 26.3 km (16.3 mi), shallow
Epicenter: 51.478° N, 176.847° W
Region: Alaska
Strongest shaking: VII, very strong shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
7.3	Mwc, centroid moment	USGS National Earthquake Information Center	Preferred · Reviewed
7.23	Mw, moment	ISC-GEM global catalog	Final · ±0.1
7.2	Mwc, centroid moment	Global CMT project	Preliminary
6.87	Me, energy	Choy, USGS energy magnitude	Reviewed
7.2	Mww, W-phase moment	Duputel, W-phase inversion	Preliminary
7.2	Mw, moment	Alaska Earthquake Center	Preliminary

Deaths and damage

From NOAA NCEI’s Significant Earthquake Database (record 6498), matched to this event by time and place.

NOAA’s record of this earthquake gives no deaths, injuries or damage.

NOAA’s full record of this earthquake The tsunami it caused

What happened

The USGS’s account of the effects of this earthquake.

Felt strongly on Adak.

From the USGS event page for usp0007jfz. U.S. Geological Survey text and figures are in the public domain.

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: 28.1% of gravity
Peak ground velocity: 3.2 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: 7.2 Mww
Nodal plane 1: Strike 260°, dip 25°, rake 105°
Nodal plane 2: Strike 63°, dip 65°, rake 82°

How well it is located

Reviewed by a seismologist.

Depth from: OPERATOR_ASSIGNED

Nearby

Within 100 km, magnitude 4.3 and up: 74 in the 60 days after this one and 56 in the 30 days before it.

After

The first 60 of 74.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0007jfz (also filed as choy19960610152456, gcmtc061096s, gcmt19960610152456, duputel061096s, ak9967g64zlm, iscgem968793, atlas19960610152458). Read Sat, Oct 3, 2026, 9:29 AM UTC.