M1.8 earthquake 6 km NW of Mattawa, Washington
A magnitude 1.8 earthquake struck 6 km NW of Mattawa, Washington on Fri, May 2, 1986, 8:49 PM PDT (03:49 UTC), 0 km (0 mi) below the surface.
A larger quake followed: M2.8 8 km SSW of Tampico, 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
- 1986-05-03 03:49:12 UTC
- Depth
- 0.3 km (0.2 mi), shallow
- Epicenter
- 46.778° N, 119.970° 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 1.6 km horizontally, 3.1 km in depth
- Magnitude uncertainty
- ±0.13
- Depth from
- From location
- Station coverage gap
- 123°
- Stations used
- 12
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 1.612 km W of Tieton, Washington · 14723 days ago · -1 km deep · 73 km away
- 2.88 km SSW of Tampico, Washington · 14715 days ago · 3 km deep · 80 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10205583. Read Sat, Oct 3, 2026, 6:43 AM UTC.