Washington earthquakes

M1.8 earthquake 2 km S of Entiat, Washington

A magnitude 1.8 earthquake struck 2 km S of Entiat, Washington on Sat, Feb 25, 1978, 9:26 PM PST (05:26 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M1.9 11 km NNW of Entiat, 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
1.8 (md), micro
Local time
UTC
1978-02-26 05:26:00 UTC
Depth
3.1 km (1.9 mi), shallow
Epicenter
47.653° N, 120.215° 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 0.3 km horizontally, 1.1 km in depth
Magnitude uncertainty
±0.04
Depth from
From location
Station coverage gap
98°
Stations used
7

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 0 in the 30 days before it.

After

  1. 1.911 km NNW of Entiat, Washington · 17740 days ago · 5 km deep · 14 km away
  2. 1.8Washington · 17726 days ago · 24 km deep · 91 km away
  3. 1.92 km SSW of Entiat, Washington · 17724 days ago · 4 km deep · 1 km away
  4. 1.66 km NE of Waterville, Washington · 17723 days ago · 2 km deep · 15 km away
  5. 3.317 km NE of Bridgeport, Washington · 17717 days ago · 12 km deep · 74 km away
  6. 1.815 km NE of Bridgeport, Washington · 17717 days ago · 11 km deep · 72 km away
  7. 1.711 km S of Ellensburg, Washington · 17703 days ago · 23 km deep · 88 km away
  8. 1.610 km W of Entiat, Washington · 17695 days ago · 0 km deep · 10 km away
  9. 1.88 km WNW of Cascade Valley, Washington · 17695 days ago · 15 km deep · 81 km away
  10. 3.37 km NNW of Entiat, Washington · 17691 days ago · 4 km deep · 9 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10845923. Read Tue, Sep 22, 2026, 3:36 PM UTC.