Washington earthquakes

M1.8 earthquake 23 km ENE of Ashford, Washington

A magnitude 1.8 earthquake struck 23 km ENE of Ashford, Washington on Sat, Jul 4, 1987, 7:29 PM PDT (02:29 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M1.9 23 km ENE of Ashford, 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
1.8 (md), micro
Local time
UTC
1987-07-05 02:29:29 UTC
Depth
1.5 km (0.9 mi), shallow
Epicenter
46.860° N, 121.761° 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 0.3 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
43°
Stations used
38

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 15 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.923 km ENE of Ashford, Washington · 14317 days ago · -1 km deep · 2 km away
  2. 1.917 km ENE of Packwood, Washington · 14312 days ago · 8 km deep · 29 km away
  3. 2.37 km N of Naches, Washington · 14309 days ago · 11 km deep · 81 km away
  4. 1.712 km S of Morton, Washington · 14308 days ago · 6 km deep · 59 km away
  5. 1.69 km N of Naches, Washington · 14308 days ago · 9 km deep · 81 km away
  6. 1.625 km ENE of Ashford, Washington · 14304 days ago · 0 km deep · 3 km away
  7. 1.85 km NE of Tanner, Washington · 14299 days ago · 13 km deep · 73 km away
  8. 1.66 km WSW of Easton, Washington · 14294 days ago · 20 km deep · 55 km away
  9. 1.61 km ESE of Lake Marcel-Stillwater, Washington · 14294 days ago · 0 km deep · 93 km away
  10. 1.635 km NNE of Amboy, Washington · 14288 days ago · -2 km deep · 82 km away
  11. 1.57 km ESE of Ravensdale, Washington · 14278 days ago · -1 km deep · 52 km away
  12. 1.72 km N of Black Diamond, Washington · 14278 days ago · 18 km deep · 56 km away
  13. 2.06 km NE of Thorp, Washington · 14277 days ago · 8 km deep · 91 km away
  14. 1.81 km NNW of Tanner, Washington · 14276 days ago · 9 km deep · 70 km away
  15. 1.614 km NNW of Tampico, Washington · 14270 days ago · 5 km deep · 65 km away

Before

  1. 1.92 km WNW of City of Sammamish, Washington · 14326 days ago · 0 km deep · 87 km away
  2. 1.838 km NNE of Amboy, Washington · 14329 days ago · -2 km deep · 80 km away
  3. 2.137 km NNE of Amboy, Washington · 14332 days ago · -2 km deep · 81 km away
  4. 2.32 km W of Wilderness Rim, Washington · 14339 days ago · 21 km deep · 65 km away
  5. 2.022 km S of Morton, Washington · 14343 days ago · 10 km deep · 67 km away
  6. 3.05 km N of Naches, Washington · 14348 days ago · 16 km deep · 82 km away
  7. 2.03 km NNW of Ravensdale, Washington · 14352 days ago · 6 km deep · 61 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10219053. Read Tue, Sep 22, 2026, 10:26 PM UTC.