M1.9 earthquake 4 km SE of Entiat, Washington
A magnitude 1.9 earthquake struck 4 km SE of Entiat, Washington on Fri, Apr 8, 1977, 1:53 PM PST (21:53 UTC), 2 km (1 mi) below the surface.
A larger quake followed: M2.1 0 km SW of Waterville, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.9 (Md, duration), micro
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 1977-04-08 21:53:42 UTC
- Depth
- 2.1 km (1.3 mi), shallow
- Epicenter
- 47.653° N, 120.161° 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 1.5 km horizontally, 7.5 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- Operator assigned
- Station coverage gap
- 163°
- Stations used
- 9
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 4 in the 30 days before it.
After
- 1.85 km W of Entiat, Washington · 18061 days ago · 0 km deep · 9 km away
- 1.77 km SE of Rock Island, Washington · 18054 days ago · 0 km deep · 37 km away
- 1.55 km SSW of Chelan Falls, Washington · 18047 days ago · 4 km deep · 16 km away
- 2.10 km SW of Waterville, Washington · 18046 days ago · 0 km deep · 6 km away
- 2.0Washington · 18044 days ago · 0 km deep · 8 km away
- 1.64 km NW of Waterville, Washington · 18041 days ago · 0 km deep · 3 km away
- 2.112 km SSW of Kittitas, Washington · 18040 days ago · 13 km deep · 89 km away
- 1.510 km WSW of Entiat, Washington · 18037 days ago · 0 km deep · 14 km away
- 1.78 km SSW of Chelan Falls, Washington · 18030 days ago · 3 km deep · 13 km away
- 1.712 km W of Entiat, Washington · 18027 days ago · 0 km deep · 17 km away
Before
- 1.715 km SSE of Kittitas, Washington · 18075 days ago · 20 km deep · 90 km away
- 2.717 km NNW of Soap Lake, Washington · 18099 days ago · 6 km deep · 44 km away
- 2.414 km ENE of George, Washington · 18099 days ago · 14 km deep · 70 km away
- 2.02 km SSE of Entiat, Washington · 18104 days ago · 6 km deep · 3 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10843498. Read Sat, Oct 3, 2026, 6:44 PM UTC.