M1.8 earthquake Washington
A magnitude 1.8 earthquake struck in Washington on Wed, Apr 17, 1991, 4:25 AM PDT (11:25 UTC), 17 km (10 mi) below the surface.
A larger quake followed: M2.2 14 km SE of Desert Aire, 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
- 1991-04-17 11:25:26 UTC
- Depth
- 16.8 km (10.4 mi), shallow
- Epicenter
- 46.591° N, 119.774° 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, 0.8 km in depth
- Magnitude uncertainty
- ±0.06
- Depth from
- From location
- Station coverage gap
- 30°
- Stations used
- 33
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 5 in the 30 days before it.
After
- 2.214 km SE of Desert Aire, Washington · 12951 days ago · 17 km deep · 0 km away
- 1.923 km NW of Bickleton, Washington · 12947 days ago · 4 km deep · 73 km away
- 1.515 km E of Kittitas, Washington · 12939 days ago · 8 km deep · 54 km away
- 1.616 km E of Mattawa, Washington · 12931 days ago · 0 km deep · 18 km away
- 2.17 km WNW of Touchet, Washington · 12904 days ago · 4 km deep · 97 km away
- 1.98 km SSW of Prosser, Washington · 12902 days ago · 20 km deep · 51 km away
Before
- 2.914 km SE of Desert Aire, Washington · 12953 days ago · 18 km deep · 0 km away
- 2.55 km E of Wallula, Washington · 12965 days ago · 9 km deep · 92 km away
- 1.69 km SSW of Prosser, Washington · 12974 days ago · 20 km deep · 52 km away
- 2.59 km SSW of Prosser, Washington · 12975 days ago · 21 km deep · 52 km away
- 2.39 km SW of Royal City, Washington · 12982 days ago · 3 km deep · 29 km away
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10273738. Read Fri, Oct 2, 2026, 1:04 PM UTC.