Washington earthquakes

M2.1 earthquake 23 km NNE of Terrace Heights, Washington

A magnitude 2.1 earthquake struck 23 km NNE of Terrace Heights, Washington on Tue, Oct 15, 1985, 7:04 AM PDT (14:04 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M2.5 15 km NNE of Richland, Washington. This one was a foreshock.

Terrace Heights 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: 2.1 (md), micro
Local time: Tue, Oct 15, 1985, 7:04 AM PDT
UTC: 1985-10-15 14:04:26 UTC
Depth: 1.9 km (1.2 mi), shallow
Epicenter: 46.787° N, 120.290° 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 1.4 km horizontally, 2.4 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 38°
Stations used: 17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 9 in the 30 days before it.

After

Before

Earthquakes today Washington earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10200098. Read Tue, Sep 22, 2026, 4:03 PM UTC.