Washington earthquakes

M2.0 earthquake 9 km SSW of Chelan Falls, Washington

A magnitude 2.0 earthquake struck 9 km SSW of Chelan Falls, Washington on Sun, Sep 27, 1987, 7:18 AM PDT (14:18 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M2.1 12 km SSE of Okanogan, 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
2.0 (md), micro
Local time
UTC
1987-09-27 14:18:24 UTC
Depth
1.7 km (1.0 mi), shallow
Epicenter
47.730° N, 120.045° 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, 2.3 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
98°
Stations used
21

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 2.041 km W of Winthrop, Washington · 14240 days ago · 4 km deep · 92 km away
  2. 2.112 km SSE of Okanogan, Washington · 14239 days ago · -1 km deep · 71 km away
  3. 1.516 km NNW of Vantage, Washington · 14235 days ago · 0 km deep · 73 km away
  4. 2.616 km NNW of Vantage, Washington · 14231 days ago · 0 km deep · 73 km away
  5. 1.917 km E of Mansfield, Washington · 14220 days ago · -1 km deep · 48 km away
  6. 1.56 km NW of Entiat, Washington · 14213 days ago · 0 km deep · 16 km away
  7. 2.05 km WNW of Quincy, Washington · 14203 days ago · 5 km deep · 54 km away
  8. 1.632 km SE of Darrington, Washington · 14201 days ago · 14 km deep · 99 km away
  9. 2.055 km ESE of Darrington, Washington · 14201 days ago · 0 km deep · 77 km away
  10. 1.85 km NE of Kittitas, Washington · 14182 days ago · 7 km deep · 83 km away
  11. 1.615 km NE of Marlin, Washington · 14181 days ago · 0 km deep · 94 km away

Before

  1. 1.54 km N of Waterville, Washington · 14245 days ago · 2 km deep · 5 km away
  2. 1.75 km NNE of Entiat, Washington · 14251 days ago · -1 km deep · 10 km away
  3. 1.736 km NE of Skykomish, Washington · 14264 days ago · 0 km deep · 78 km away
  4. 2.136 km NE of Skykomish, Washington · 14264 days ago · 0 km deep · 78 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10226138. Read Tue, Sep 22, 2026, 8:02 AM UTC.