Washington earthquakes

M3.8 earthquake 2 km WNW of Cherry Grove, Washington

A magnitude 3.8 earthquake struck 2 km WNW of Cherry Grove, Washington on Thu, Aug 3, 2006, 1:39 AM PDT (08:39 UTC), 14 km (9 mi) below the surface.

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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: 3.8 (Md, duration), minor
Magnitude from: Pacific Northwest Seismic Network
Local time: Thu, Aug 3, 2006, 1:39 AM PDT
UTC: 2006-08-03 08:39:18 UTC
Depth: 14.3 km (8.9 mi), shallow
Epicenter: 45.802° N, 122.607° W
Region: Washington
Felt reports: 3,764
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
3.8	Md, duration	Pacific Northwest Seismic Network	Preferred · Final · ±0.03 · 8 stations
3.8	Md, duration	USGS National Earthquake Information Center	Reviewed

What happened

The USGS’s account of the effects of this earthquake.

Felt (IV) at Amboy, Ariel, Battle Ground, Camas, Kalama, Kelso, La Center, Ridgefield, Stevenson, Vancouver, Woodland and Yacolt; (III) at Brush Prairie, Longview and Washougal. Felt at Carson, Castle Rock, Centerville, Eatonville, Everett, Glenoma, Randle, Seattle and Sultan. Also felt (IV) at Boring, Fairview and Portland; (III) at Banks, Beaverton, Clackamas, Forest Grove, Gresham, Hillsboro, Hood River, Lake Oswego, North Plains, Oregon City, Rainier, Saint Helens, Sandy, Scappoose, Vernonia, Troutdale, Tualatin, Warren and West Linn; (II) at Beavercreek, Canby, Cornelius, Gladstone and Salem, Oregon. Felt at Aurora, Clatskanie, Corbett, Corvallis, Dundee, Gaston, Lyons, Mosier, Rhododendron, Scotts Mills, Sherwood, Welches and Wilsonville, Oregon.

From the USGS event page for uw10695763. U.S. Geological Survey text and figures are in the public domain.

Did you feel it?

3,764 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 0.1 km horizontally, 0.2 km in depth
Magnitude uncertainty: ±0.03
Depth from: From location
Station coverage gap: 26°
Stations used: 72

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 195 in the 60 days after this one and 108 in the 30 days before it.

After

The first 60 of 195.

Before

Earthquakes today Washington earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10695763 (also filed as usp000eq5e, uw08030839). Read Sat, Oct 3, 2026, 7:53 AM UTC.