M1.8 earthquake Washington
A magnitude 1.8 earthquake struck in Washington on Tue, Oct 21, 2008, 8:21 PM PDT (03:21 UTC), 7 km (4 mi) below the surface.
A larger quake followed: M2.4 15 km N of Naches, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.8 (Md, duration), micro
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 2008-10-22 03:21:21 UTC
- Depth
- 6.8 km (4.2 mi), shallow
- Epicenter
- 46.757° N, 120.911° 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 0.5 km horizontally, 0.6 km in depth
- Magnitude uncertainty
- ±0.05
- Depth from
- From location
- Station coverage gap
- 71°
- Stations used
- 16
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 2.415 km N of Naches, Washington · 6542 days ago · 14 km deep · 22 km away
- 2.214 km SSE of Carbonado, Washington · 6538 days ago · 11 km deep · 84 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10761123. Read Mon, Oct 5, 2026, 6:40 AM UTC.