Washington earthquakes

M2.0 earthquake 25 km ENE of Ashford, Washington

A magnitude 2.0 earthquake struck 25 km ENE of Ashford, Washington on Sun, Oct 18, 1987, 4:21 AM PDT (11:21 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M2.1 38 km NNE of Amboy, 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
1987-10-18 11:21:37 UTC
Depth
-1.2 km (-0.8 mi), shallow
Epicenter
46.868° N, 121.732° 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
±0.08
Depth from
Operator assigned
Station coverage gap
58°
Stations used
22

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 1.81 km ENE of Vashon, Washington · 14212 days ago · 22 km deep · 85 km away
  2. 1.87 km WSW of Wilderness Rim, Washington · 14204 days ago · 16 km deep · 61 km away
  3. 2.138 km NNE of Amboy, Washington · 14194 days ago · 4 km deep · 82 km away
  4. 1.522 km SSE of Packwood, Washington · 14190 days ago · -1 km deep · 52 km away
  5. 1.537 km NNE of Amboy, Washington · 14181 days ago · -2 km deep · 82 km away
  6. 1.921 km S of Morton, Washington · 14179 days ago · 10 km deep · 68 km away
  7. 2.621 km S of Morton, Washington · 14177 days ago · 7 km deep · 68 km away
  8. 4.12 km ENE of Cowiche, Washington · 14174 days ago · 17 km deep · 83 km away
  9. 4.33 km ENE of Cowiche, Washington · 14174 days ago · 17 km deep · 83 km away

Before

  1. 1.60 km SE of Lakeland South, Washington · 14222 days ago · 16 km deep · 61 km away
  2. 2.021 km SSE of Mossyrock, Washington · 14222 days ago · 7 km deep · 78 km away
  3. 1.68 km NNE of Snoqualmie, Washington · 14223 days ago · 10 km deep · 81 km away
  4. 1.96 km SSE of Wilderness Rim, Washington · 14229 days ago · 1 km deep · 58 km away
  5. 1.52 km ESE of Ames Lake, Washington · 14231 days ago · 22 km deep · 85 km away
  6. 2.16 km SSE of Wilderness Rim, Washington · 14232 days ago · 1 km deep · 58 km away
  7. 1.62 km W of Black Diamond, Washington · 14233 days ago · 13 km deep · 54 km away
  8. 1.715 km E of Castle Rock, Washington · 14239 days ago · 6 km deep · 98 km away
  9. 1.930 km E of Packwood, Washington · 14243 days ago · -1 km deep · 46 km away
  10. 1.513 km NE of Cliffdell, Washington · 14244 days ago · -1 km deep · 63 km away
  11. 1.61 km SW of Lake Marcel-Stillwater, Washington · 14244 days ago · 22 km deep · 92 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10226003. Read Tue, Sep 22, 2026, 9:38 AM UTC.