Washington earthquakes

M2.8 earthquake 3 km W of Chico, Washington

A magnitude 2.8 earthquake struck 3 km W of Chico, Washington on Mon, Apr 27, 1987, 11:42 PM PDT (06:42 UTC), 20 km (12 mi) below the surface.

Chico 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
2.8 (md), micro
Local time
UTC
1987-04-28 06:42:46 UTC
Depth
20.1 km (12.5 mi), shallow
Epicenter
47.610° N, 122.763° 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 0.4 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
28°
Stations used
33

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 6 in the 30 days before it.

After

  1. 2.11 km E of Algona, Washington · 14378 days ago · 12 km deep · 54 km away
  2. 2.019 km SSE of Friday Harbor, Washington · 14366 days ago · 14 km deep · 85 km away
  3. 1.54 km W of Chico, Washington · 14360 days ago · 21 km deep · 1 km away
  4. 2.13 km SSW of Clinton, Washington · 14358 days ago · 28 km deep · 47 km away
  5. 1.76 km W of Burley, Washington · 14357 days ago · 23 km deep · 21 km away
  6. 2.03 km NNW of Ravensdale, Washington · 14351 days ago · 6 km deep · 63 km away
  7. 2.06 km NE of Duvall, Washington · 14343 days ago · 20 km deep · 65 km away
  8. 2.49 km W of Gorst, Washington · 14341 days ago · 18 km deep · 9 km away
  9. 2.32 km W of Wilderness Rim, Washington · 14338 days ago · 21 km deep · 74 km away
  10. 2.72 km E of Edmonds, Washington · 14333 days ago · 15 km deep · 38 km away

Before

  1. 1.532 km NE of Queets, Washington · 14392 days ago · -1 km deep · 95 km away
  2. 1.61 km NNW of Fall City, Washington · 14400 days ago · 8 km deep · 65 km away
  3. 2.51 km NE of Riverton, Washington · 14405 days ago · 23 km deep · 38 km away
  4. 1.61 km NE of Riverton, Washington · 14410 days ago · 24 km deep · 38 km away
  5. 1.78 km NNE of Snoqualmie, Washington · 14412 days ago · 8 km deep · 74 km away
  6. 2.61 km NE of Riverton, Washington · 14413 days ago · 25 km deep · 38 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10220373 (also filed as usp00034j6). Read Tue, Sep 22, 2026, 7:44 AM UTC.