Washington earthquakes

M3.0 earthquake 20 km E of Castle Rock, Washington

A magnitude 3.0 earthquake struck 20 km E of Castle Rock, Washington on Thu, Dec 29, 1983, 2:46 AM PST (10:46 UTC), 13 km (8 mi) below the surface.

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The earthquake

Magnitude
3.0 (md), minor
Local time
UTC
1983-12-29 10:46:05 UTC
Depth
13.4 km (8.4 mi), shallow
Epicenter
46.263° N, 122.648° W
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 1.1 km horizontally, 1.6 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
117°
Stations used
33

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 108 in the 60 days after this one and 15 in the 30 days before it.

After

The first 60 of 108.

Before

Earthquakes todayWashington earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10173518. Read Tue, Sep 22, 2026, 12:14 PM UTC.