M1.8 earthquake 6 km WNW of Entiat, Washington
A magnitude 1.8 earthquake struck 6 km WNW of Entiat, Washington on Sun, Oct 16, 1977, 4:59 PM PDT (23:59 UTC), 0 km (0 mi) below the surface.
A larger quake followed: M2.7 5 km ESE of Okanogan, 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
- 1977-10-16 23:59:26 UTC
- Depth
- -0.3 km (-0.2 mi), shallow
- Epicenter
- 47.688° N, 120.287° 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 0.4 km horizontally
- Magnitude uncertainty
- ±0.05
- Depth from
- From location
- Station coverage gap
- 105°
- Stations used
- 8
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 3 in the 30 days before it.
After
- 1.74 km NNE of Entiat, Washington · 17878 days ago · 2 km deep · 8 km away
- 2.1Washington · 17877 days ago · 0 km deep · 82 km away
- 2.09 km ENE of Thorp, Washington · 17866 days ago · 10 km deep · 69 km away
- 2.28 km NNW of Thorp, Washington · 17861 days ago · 4 km deep · 70 km away
- 2.75 km ESE of Okanogan, Washington · 17851 days ago · 15 km deep · 93 km away
- 2.08 km NNE of Royal City, Washington · 17827 days ago · 4 km deep · 95 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10844928. Read Sat, Oct 3, 2026, 11:29 AM UTC.