Washington earthquakes

M1.6 earthquake 1 km NNW of Fall City, Washington

A magnitude 1.6 earthquake struck 1 km NNW of Fall City, Washington on Sun, Apr 19, 1987, 11:05 PM PDT (06:05 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.8 3 km W of Chico, Washington. This one was a foreshock.

Fall City 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
1.6 (md), micro
Local time
UTC
1987-04-20 06:05:36 UTC
Depth
7.7 km (4.8 mi), shallow
Epicenter
47.575° N, 121.895° 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 0.0 km horizontally, 0.1 km in depth
Magnitude uncertainty
±0.05
Depth from
Operator assigned
Station coverage gap
131°
Stations used
5

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 6 in the 30 days before it.

After

  1. 1.619 km N of Packwood, Washington · 14399 days ago · 6 km deep · 91 km away
  2. 1.520 km SSE of Marblemount, Washington · 14395 days ago · -1 km deep · 95 km away
  3. 2.83 km W of Chico, Washington · 14393 days ago · 20 km deep · 65 km away
  4. 2.11 km E of Algona, Washington · 14378 days ago · 12 km deep · 42 km away
  5. 1.54 km W of Chico, Washington · 14360 days ago · 21 km deep · 66 km away
  6. 2.13 km SSW of Clinton, Washington · 14358 days ago · 28 km deep · 54 km away
  7. 1.76 km W of Burley, Washington · 14358 days ago · 23 km deep · 64 km away
  8. 2.03 km NNW of Ravensdale, Washington · 14352 days ago · 6 km deep · 22 km away
  9. 2.06 km NE of Duvall, Washington · 14344 days ago · 20 km deep · 23 km away
  10. 1.932 km NNW of Leavenworth, Washington · 14343 days ago · 0 km deep · 89 km away
  11. 2.49 km W of Gorst, Washington · 14341 days ago · 18 km deep · 70 km away

Before

  1. 2.51 km NE of Riverton, Washington · 14405 days ago · 23 km deep · 31 km away
  2. 1.61 km NE of Riverton, Washington · 14411 days ago · 24 km deep · 30 km away
  3. 1.78 km NNE of Snoqualmie, Washington · 14413 days ago · 8 km deep · 10 km away
  4. 2.61 km NE of Riverton, Washington · 14413 days ago · 25 km deep · 30 km away
  5. 2.83 km SSW of Swede Heaven, Washington · 14416 days ago · 1 km deep · 76 km away
  6. 2.27 km ENE of Lofall, Washington · 14423 days ago · 8 km deep · 59 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10219273. Read Tue, Sep 22, 2026, 8:27 PM UTC.