M1.8 earthquake 9 km S of Prosser, Washington
A magnitude 1.8 earthquake struck 9 km S of Prosser, Washington on Tue, May 13, 2003, 9:59 PM PDT (04:59 UTC), 22 km (13 mi) below the surface.
A larger quake followed: M2.3 18 km NNW of West Richland, 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
- 2003-05-14 04:59:43 UTC
- Depth
- 21.6 km (13.4 mi), shallow
- Epicenter
- 46.121° N, 119.785° 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, 0.2 km in depth
- Magnitude uncertainty
- ±0.03
- Depth from
- From location
- Station coverage gap
- 112°
- Stations used
- 26
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 1.73 km ENE of Tampico, Washington · 8513 days ago · -1 km deep · 93 km away
- 1.615 km NNE of Prosser, Washington · 8500 days ago · 6 km deep · 25 km away
- 2.318 km NNW of West Richland, Washington · 8483 days ago · 13 km deep · 46 km away
- 1.52 km ESE of Benton City, Washington · 8482 days ago · 2 km deep · 29 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10584288. Read Thu, Oct 1, 2026, 1:49 PM UTC.