M1.8 earthquake 12 km N of Winthrop, Washington
A magnitude 1.8 earthquake struck 12 km N of Winthrop, Washington on Sat, Oct 23, 2004, 10:16 AM PDT (17:16 UTC), -1 km (-1 mi) below the surface.
A larger quake followed: M2.9 6 km SW of Chelan Falls, 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
- 2004-10-23 17:16:57 UTC
- Depth
- -1.1 km (-0.7 mi), shallow
- Epicenter
- 48.586° N, 120.175° 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 0.0 km horizontally, 0.1 km in depth
- Magnitude uncertainty
- ±0.02
- Depth from
- Operator assigned
- Station coverage gap
- 129°
- Stations used
- 11
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 3 in the 30 days before it.
After
- 1.642 km SSW of Princeton, Canada · 8009 days ago · -1 km deep · 77 km away
- 2.96 km SW of Chelan Falls, Washington · 8004 days ago · 2 km deep · 93 km away
- 1.87 km SW of Chelan Falls, Washington · 8004 days ago · -1 km deep · 93 km away
- 2.27 km S of Malott, Washington · 7961 days ago · -1 km deep · 54 km away
- 2.27 km S of Malott, Washington · 7961 days ago · -1 km deep · 54 km away
- 1.810 km NNE of Brewster, Washington · 7956 days ago · 0 km deep · 55 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10666613. Read Fri, Oct 2, 2026, 11:18 AM UTC.