M1.7 earthquake 5 km S of Ahtanum, Washington
A magnitude 1.7 earthquake struck 5 km S of Ahtanum, Washington on Sat, Oct 25, 2003, 5:22 AM PDT (12:22 UTC), 16 km (10 mi) below the surface.
A larger quake followed: M2.6 7 km SSW of Nile, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.7 (Md, duration), micro
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 2003-10-25 12:22:51 UTC
- Depth
- 16.4 km (10.2 mi), shallow
- Epicenter
- 46.511° N, 120.634° 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 1.2 km horizontally, 1.3 km in depth
- Magnitude uncertainty
- ±0.05
- Depth from
- From location
- Station coverage gap
- 107°
- Stations used
- 20
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 3 in the 30 days before it.
After
- 2.67 km SSW of Nile, Washington · 8366 days ago · 5 km deep · 37 km away
- 1.812 km SSW of Royal City, Washington · 8366 days ago · 1 km deep · 79 km away
- 1.622 km S of Packwood, Washington · 8359 days ago · 1 km deep · 76 km away
- 2.22 km SE of Kittitas, Washington · 8351 days ago · -1 km deep · 54 km away
- 1.910 km SW of Nile, Washington · 8335 days ago · 3 km deep · 41 km away
- 2.0Washington · 8333 days ago · 3 km deep · 40 km away
- 1.82 km SW of Packwood, Washington · 8328 days ago · 4 km deep · 82 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10601768. Read Thu, Oct 1, 2026, 5:47 PM UTC.