Washington earthquakes

M5.1 earthquake Washington

A magnitude 5.1 earthquake struck in Washington on Thu, Apr 3, 1980, 1:35 AM PST (09:35 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M5.7 38 km NNE of Amboy, Washington. This one was a foreshock.

Morton forecast More in Washington

Map

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

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The earthquake

Magnitude: 5.1 (md), moderate
Local time: Thu, Apr 3, 1980, 1:35 AM PST
UTC: 1980-04-03 09:35:26 UTC
Depth: -0.9 km (-0.6 mi), shallow
Epicenter: 46.227° N, 122.172° W
Region: Washington
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 0.1 km horizontally, 0.1 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 69°
Stations used: 18

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 2.1 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10076633 (also filed as ushis3574, usp00016dz). Read Wed, Sep 23, 2026, 7:46 AM UTC.