Washington earthquakes

M1.6 earthquake 5 km W of Entiat, Washington

A magnitude 1.6 earthquake struck 5 km W of Entiat, Washington on Fri, Dec 31, 1976, 4:08 AM PST (12:08 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M3.2 5 km NE of Royal City, Washington. This one was a foreshock.

Entiat forecastMore in Washington

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.6 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1976-12-31 12:08:04 UTC
Depth
10.7 km (6.7 mi), shallow
Epicenter
47.680° N, 120.287° W
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 1.4 km horizontally, 1.3 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
253°, poorly surrounded by stations
Stations used
5

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 8 in the 30 days before it.

After

  1. 1.820 km N of Leavenworth, Washington · 18170 days ago · 6 km deep · 30 km away
  2. 1.73 km NNE of Entiat, Washington · 18169 days ago · 0 km deep · 7 km away
  3. 1.85 km NE of Royal City, Washington · 18161 days ago · 1 km deep · 98 km away
  4. 3.25 km NE of Royal City, Washington · 18145 days ago · 1 km deep · 98 km away
  5. 1.75 km W of Waterville, Washington · 18143 days ago · 3 km deep · 11 km away
  6. 1.87 km W of Entiat, Washington · 18130 days ago · 2 km deep · 2 km away
  7. 1.64 km NNE of Waterville, Washington · 18118 days ago · 5 km deep · 18 km away

Before

  1. 1.912 km E of Tanner, Washington · 18175 days ago · 22 km deep · 100 km away
  2. 1.65 km N of Entiat, Washington · 18183 days ago · 2 km deep · 8 km away
  3. 2.019 km E of Mansfield, Washington · 18184 days ago · -1 km deep · 70 km away
  4. 1.77 km W of Entiat, Washington · 18185 days ago · 3 km deep · 2 km away
  5. 2.421 km E of Darrington, Washington · 18189 days ago · 11 km deep · 98 km away
  6. 3.14 km W of Waterville, Washington · 18189 days ago · 5 km deep · 12 km away
  7. 1.615 km E of Mansfield, Washington · 18199 days ago · 0 km deep · 66 km away
  8. 1.78 km NNE of Waterville, Washington · 18199 days ago · 3 km deep · 19 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10842898. Read Thu, Oct 1, 2026, 7:44 PM UTC.