M1.5 earthquake 9 km SSW of Chelan Falls, Washington
A magnitude 1.5 earthquake struck 9 km SSW of Chelan Falls, Washington on Sat, Aug 9, 2003, 12:04 AM PDT (07:04 UTC), 4 km (3 mi) below the surface.
A larger quake followed: M2.9 37 km W of Granite 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
- 1.5 (Md, duration), micro
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 2003-08-09 07:04:55 UTC
- Depth
- 4.1 km (2.5 mi), shallow
- Epicenter
- 47.728° N, 120.043° 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 4.7 km horizontally, 4.3 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- From location
- Station coverage gap
- 126°
- Stations used
- 6
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 1 in the 30 days before it.
After
- 1.88 km WNW of Entiat, Washington · 8453 days ago · -1 km deep · 20 km away
- 1.710 km W of Twisp, Washington · 8446 days ago · -1 km deep · 72 km away
- 1.75 km SSW of Entiat, Washington · 8439 days ago · -1 km deep · 19 km away
- 2.937 km W of Granite Falls, Washington · 8437 days ago · 5 km deep · 54 km away
- 1.936 km N of Leavenworth, Washington · 8436 days ago · 5 km deep · 54 km away
- 2.14 km W of Entiat, Washington · 8431 days ago · 4 km deep · 18 km away
- 1.952 km WNW of Granite Falls, Washington · 8427 days ago · -1 km deep · 72 km away
- 1.911 km SE of Skykomish, Washington · 8396 days ago · 5 km deep · 93 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10590213. Read Thu, Oct 1, 2026, 1:39 PM UTC.