Washington earthquakes

M1.7 earthquake 15 km SSE of Kittitas, Washington

A magnitude 1.7 earthquake struck 15 km SSE of Kittitas, Washington on Fri, Apr 8, 1977, 7:33 AM PST (15:33 UTC), 20 km (12 mi) below the surface.

A larger quake followed: M2.1 0 km SW of Waterville, Washington. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
1.7 (md), micro
Local time
UTC
1977-04-08 15:33:21 UTC
Depth
19.9 km (12.4 mi), shallow
Epicenter
46.849° N, 120.347° 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 2.9 km horizontally, 2.3 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
186°, poorly surrounded by stations
Stations used
6

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. 1.94 km SE of Entiat, Washington · 18071 days ago · 2 km deep · 90 km away
  2. 1.85 km W of Entiat, Washington · 18058 days ago · 0 km deep · 91 km away
  3. 1.77 km SE of Rock Island, Washington · 18051 days ago · 0 km deep · 56 km away
  4. 2.10 km SW of Waterville, Washington · 18043 days ago · 0 km deep · 91 km away
  5. 2.0Washington · 18040 days ago · 0 km deep · 97 km away
  6. 1.64 km NW of Waterville, Washington · 18038 days ago · 0 km deep · 93 km away
  7. 1.84 km E of Benton City, Washington · 18037 days ago · 1 km deep · 95 km away
  8. 2.112 km SSW of Kittitas, Washington · 18036 days ago · 13 km deep · 13 km away
  9. 1.510 km WSW of Entiat, Washington · 18033 days ago · 0 km deep · 90 km away
  10. 1.712 km W of Entiat, Washington · 18023 days ago · 0 km deep · 91 km away

Before

  1. 2.717 km NNW of Soap Lake, Washington · 18095 days ago · 6 km deep · 93 km away
  2. 2.414 km ENE of George, Washington · 18095 days ago · 14 km deep · 59 km away
  3. 1.93 km SSW of Benton City, Washington · 18097 days ago · 0 km deep · 94 km away
  4. 2.02 km SSE of Entiat, Washington · 18101 days ago · 6 km deep · 90 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10843493. Read Wed, Sep 30, 2026, 9:06 AM UTC.