Oregon earthquakes

M1.9 earthquake Washington-Oregon border region

A magnitude 1.9 earthquake struck in the Washington-Oregon border region on Thu, Apr 23, 1981, 10:26 AM PST (18:26 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.6 21 km S of Morton, Washington. This one was a foreshock.

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Map

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

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The earthquake

Magnitude: 1.9 (md), micro
Local time: Thu, Apr 23, 1981, 10:26 AM PST
UTC: 1981-04-23 18:26:24 UTC
Depth: 6.2 km (3.8 mi), shallow
Epicenter: 45.862° N, 122.832° W
Region: Oregon
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 1.9 km horizontally, 0.9 km in depth
Magnitude uncertainty: ±0.19
Depth from: From location
Station coverage gap: 284°, poorly surrounded by stations
Stations used: 9

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 52 in the 60 days after this one and 48 in the 30 days before it.

After

Before

Earthquakes today Oregon earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10106903. Read Tue, Sep 22, 2026, 10:17 AM UTC.