M1.5 earthquake 3 km NNW of Custer, Washington
A magnitude 1.5 earthquake struck 3 km NNW of Custer, Washington on Thu, Oct 23, 1986, 9:30 AM PDT (16:30 UTC), 6 km (3 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.5 (md), micro
- Local time
- UTC
- 1986-10-23 16:30:33 UTC
- Depth
- 5.5 km (3.4 mi), shallow
- Epicenter
- 48.950° N, 122.656° 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 2.6 km horizontally, 1.4 km in depth
- Magnitude uncertainty
- ±0.09
- Depth from
- From location
- Station coverage gap
- 287°, poorly surrounded by stations
- Stations used
- 6
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 3 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 uw10223578. Read Tue, Sep 22, 2026, 6:53 PM UTC.