M2.1 earthquake 8 km W of Entiat, Washington
A magnitude 2.1 earthquake struck 8 km W of Entiat, Washington on Wed, Dec 21, 1977, 10:47 PM PST (06:47 UTC), 5 km (3 mi) below the surface.
A larger quake followed: M2.2 3 km ENE of Manson, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.1 (md), micro
- Local time
- UTC
- 1977-12-22 06:47:57 UTC
- Depth
- 5.4 km (3.4 mi), shallow
- Epicenter
- 47.675° N, 120.318° 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 0.3 km horizontally, 0.5 km in depth
- Magnitude uncertainty
- ±0.05
- Depth from
- From location
- Station coverage gap
- 147°
- Stations used
- 11
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 1 in the 30 days before it.
After
- 2.118 km N of Index, Washington · 17801 days ago · 5 km deep · 95 km away
- 1.718 km N of Index, Washington · 17801 days ago · 5 km deep · 95 km away
- 1.719 km N of Index, Washington · 17801 days ago · 8 km deep · 95 km away
- 1.817 km NE of May Creek, Washington · 17801 days ago · 8 km deep · 97 km away
- 2.115 km N of Kittitas, Washington · 17800 days ago · 0 km deep · 62 km away
- 2.23 km ENE of Manson, Washington · 17779 days ago · 0 km deep · 29 km away
- 3.33 km ENE of Manson, Washington · 17772 days ago · 0 km deep · 29 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10845393. Read Tue, Sep 22, 2026, 9:43 AM UTC.