Washington earthquakes

M1.7 earthquake 7 km ENE of Mossyrock, Washington

A magnitude 1.7 earthquake struck 7 km ENE of Mossyrock, Washington on Thu, May 21, 1987, 5:16 PM PDT (00:16 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M2.2 10 km E of Yacolt, Washington. This one was a foreshock.

Mossyrock 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
1.7 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1987-05-22 00:16:58 UTC
Depth
22.0 km (13.7 mi), shallow
Epicenter
46.553° N, 122.396° 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, 0.5 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
56°
Stations used
29

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 1.511 km ENE of East Cathlamet, Washington · 14378 days ago · 23 km deep · 73 km away
  2. 2.210 km E of Yacolt, Washington · 14377 days ago · 6 km deep · 76 km away
  3. 1.519 km E of Kelso, Washington · 14371 days ago · 13 km deep · 49 km away
  4. 1.76 km W of Burley, Washington · 14368 days ago · 23 km deep · 100 km away
  5. 2.03 km NNW of Ravensdale, Washington · 14362 days ago · 6 km deep · 97 km away
  6. 2.022 km S of Morton, Washington · 14353 days ago · 10 km deep · 25 km away
  7. 1.58 km S of Pe Ell, Washington · 14351 days ago · 23 km deep · 70 km away
  8. 2.011 km ENE of Kalama, WA · 14344 days ago · 16 km deep · 61 km away
  9. 2.137 km NNE of Amboy, Washington · 14343 days ago · -2 km deep · 43 km away
  10. 1.838 km NNE of Amboy, Washington · 14340 days ago · -2 km deep · 42 km away
  11. 1.823 km ENE of Ashford, Washington · 14335 days ago · 2 km deep · 59 km away
  12. 1.923 km ENE of Ashford, Washington · 14328 days ago · -1 km deep · 59 km away
  13. 1.917 km ENE of Packwood, Washington · 14323 days ago · 8 km deep · 72 km away

Before

  1. 2.33 km W of Brush Prairie, Washington · 14385 days ago · 20 km deep · 92 km away
  2. 2.11 km E of Algona, Washington · 14389 days ago · 12 km deep · 81 km away
  3. 1.619 km N of Packwood, Washington · 14409 days ago · 6 km deep · 63 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10220743. Read Sat, Oct 3, 2026, 12:57 PM UTC.