M1.9 earthquake 15 km SE of Prosser, Washington
A magnitude 1.9 earthquake struck 15 km SE of Prosser, Washington on Mon, Sep 24, 1990, 3:17 PM PDT (22:17 UTC), 7 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
- 1.9 (Md, duration), micro
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 1990-09-24 22:17:20 UTC
- Depth
- 7.5 km (4.6 mi), shallow
- Epicenter
- 46.097° N, 119.656° 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, 0.8 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- From location
- Station coverage gap
- 95°
- 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: 3 in the 60 days after this one and 4 in the 30 days before it.
After
- 1.520 km SSE of Royal City, Washington · 13123 days ago · 16 km deep · 73 km away
- 2.41 km SSW of Finley, Washington · 13121 days ago · 12 km deep · 48 km away
- 1.827 km ESE of Desert Aire, Washington · 13100 days ago · 26 km deep · 54 km away
Before
- 1.54 km WSW of Benton City, Washington · 13168 days ago · 7 km deep · 19 km away
- 2.114 km SSE of Prosser, Washington · 13175 days ago · 8 km deep · 1 km away
- 1.815 km SE of Prosser, Washington · 13176 days ago · 8 km deep · 0 km away
- 1.815 km SSE of Prosser, Washington · 13176 days ago · 7 km deep · 1 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10265648. Read Sat, Oct 3, 2026, 12:21 AM UTC.