Washington earthquakes

M2.3 earthquake 5 km NNE of Waterville, Washington

A magnitude 2.3 earthquake struck 5 km NNE of Waterville, Washington on Tue, Aug 20, 1991, 8:46 PM PDT (03:46 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.7 8 km SE of Kittitas, Washington. This one was a foreshock.

Waterville 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
2.3 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1991-08-21 03:46:59 UTC
Depth
5.0 km (3.1 mi), shallow
Epicenter
47.691° N, 120.034° 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 0.6 km horizontally, 1.1 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
50°
Stations used
36

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 11 in the 30 days before it.

After

  1. 1.56 km SE of Kittitas, Washington · 12826 days ago · 3 km deep · 88 km away
  2. 2.56 km SE of Kittitas, Washington · 12823 days ago · 3 km deep · 87 km away
  3. 1.96 km SE of Kittitas, Washington · 12822 days ago · 0 km deep · 87 km away
  4. 1.534 km W of Winthrop, Washington · 12814 days ago · -1 km deep · 98 km away
  5. 2.78 km SE of Kittitas, Washington · 12807 days ago · 4 km deep · 87 km away
  6. 2.67 km SE of Kittitas, Washington · 12806 days ago · 3 km deep · 88 km away
  7. 1.57 km SSE of Kittitas, Washington · 12795 days ago · 5 km deep · 89 km away
  8. 2.17 km SE of Kittitas, Washington · 12795 days ago · 3 km deep · 88 km away
  9. 1.96 km SE of Kittitas, Washington · 12793 days ago · 3 km deep · 88 km away
  10. 1.78 km S of Leavenworth, Washington · 12788 days ago · 0 km deep · 49 km away

Before

  1. 1.57 km SSE of Kittitas, Washington · 12829 days ago · 4 km deep · 89 km away
  2. 2.47 km SE of Kittitas, Washington · 12829 days ago · 3 km deep · 88 km away
  3. 2.14 km SSE of Pateros, Washington · 12833 days ago · 9 km deep · 38 km away
  4. 1.55 km S of Royal City, Washington · 12835 days ago · 12 km deep · 98 km away
  5. 1.57 km SE of Kittitas, Washington · 12835 days ago · 3 km deep · 87 km away
  6. 2.86 km SE of Kittitas, Washington · 12842 days ago · 4 km deep · 87 km away
  7. 1.67 km SE of Kittitas, Washington · 12842 days ago · 2 km deep · 88 km away
  8. 1.621 km SW of South Wenatchee, Washington · 12845 days ago · 8 km deep · 60 km away
  9. 1.82 km SE of Entiat, Washington · 12848 days ago · 4 km deep · 11 km away
  10. 2.09 km NNE of Waterville, Washington · 12850 days ago · 4 km deep · 4 km away
  11. 1.78 km N of Waterville, Washington · 12851 days ago · 2 km deep · 5 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10279813. Read Sat, Oct 3, 2026, 12:06 AM UTC.