Washington earthquakes

M4.1 earthquake 9 km SW of Friday Harbor, Washington

A magnitude 4.1 earthquake struck 9 km SW of Friday Harbor, Washington on Fri, Sep 20, 2002, 5:55 PM PDT (00:55 UTC), 23 km (14 mi) below the surface.

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The earthquake

Magnitude: 4.1 (md), light
Local time: Fri, Sep 20, 2002, 5:55 PM PDT
UTC: 2002-09-21 00:55:20 UTC
Depth: 23.1 km (14.4 mi), shallow
Epicenter: 48.485° N, 123.126° W
Region: Washington
Felt reports: 294
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

294 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 0.7 km horizontally, 1.0 km in depth
Magnitude uncertainty: ±0.04
Depth from: From location
Station coverage gap: 78°
Stations used: 57

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 24 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 uw10565603 (also filed as usp000bcs8, uw09210055). Read Wed, Sep 30, 2026, 11:50 PM UTC.