M2.1 earthquake 14 km SSE of Prosser, Washington
A magnitude 2.1 earthquake struck 14 km SSE of Prosser, Washington on Thu, Sep 6, 1990, 7:40 AM PDT (14:40 UTC), 8 km (5 mi) below the surface.
A larger quake followed: M2.4 1 km SSW of Finley, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.1 (Md, duration), micro
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 1990-09-06 14:40:24 UTC
- Depth
- 8.0 km (5.0 mi), shallow
- Epicenter
- 46.096° N, 119.664° 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 0.6 km horizontally, 0.9 km in depth
- Magnitude uncertainty
- ±0.06
- Depth from
- From location
- Station coverage gap
- 152°
- Stations used
- 24
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 3 in the 30 days before it.
After
- 1.54 km WSW of Benton City, Washington · 13168 days ago · 7 km deep · 19 km away
- 1.915 km SE of Prosser, Washington · 13157 days ago · 7 km deep · 1 km away
- 1.520 km SSE of Royal City, Washington · 13122 days ago · 16 km deep · 73 km away
- 2.41 km SSW of Finley, Washington · 13120 days ago · 12 km deep · 49 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10261478. Read Fri, Oct 2, 2026, 2:02 PM UTC.