M1.6 earthquake 18 km ESE of Mansfield, Washington
A magnitude 1.6 earthquake struck 18 km ESE of Mansfield, Washington on Sun, Oct 1, 1978, 12:15 AM PDT (07:15 UTC), 0 km (0 mi) below the surface.
A larger quake followed: M3.1 10 km NNW of Mansfield, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.6 (md), micro
- Local time
- UTC
- 1978-10-01 07:15:31 UTC
- Depth
- -0.1 km (-0.1 mi), shallow
- Epicenter
- 47.779° N, 119.400° 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
- Magnitude uncertainty
- ±0.10
- Depth from
- From location
- Station coverage gap
- 90°
- Stations used
- 7
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 1 in the 30 days before it.
After
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10847998. Read Tue, Sep 22, 2026, 5:27 PM UTC.