Washington earthquakes

M2.0 earthquake 6 km NE of Thorp, Washington

A magnitude 2.0 earthquake struck 6 km NE of Thorp, Washington on Fri, Aug 21, 1987, 1:55 PM PDT (20:55 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.2 18 km ESE of Royal City, 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
1987-08-21 20:55:34 UTC
Depth
8.2 km (5.1 mi), shallow
Epicenter
47.117° N, 120.620° 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 0.9 km horizontally, 1.7 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
59°
Stations used
31

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 19 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.81 km NNW of Tanner, Washington · 14275 days ago · 9 km deep · 95 km away
  2. 2.218 km ESE of Royal City, Washington · 14271 days ago · 0 km deep · 96 km away
  3. 1.917 km ESE of Royal City, Washington · 14271 days ago · 0 km deep · 96 km away
  4. 1.614 km NNW of Tampico, Washington · 14269 days ago · 5 km deep · 58 km away
  5. 2.136 km NE of Skykomish, Washington · 14264 days ago · 0 km deep · 98 km away
  6. 1.736 km NE of Skykomish, Washington · 14264 days ago · 0 km deep · 98 km away
  7. 2.123 km ENE of Ashford, Washington · 14263 days ago · 1 km deep · 91 km away
  8. 1.75 km NNE of Entiat, Washington · 14251 days ago · -1 km deep · 75 km away
  9. 1.54 km N of Waterville, Washington · 14245 days ago · 2 km deep · 76 km away
  10. 1.513 km NE of Cliffdell, Washington · 14244 days ago · -1 km deep · 26 km away
  11. 1.930 km E of Packwood, Washington · 14243 days ago · -1 km deep · 76 km away
  12. 2.09 km SSW of Chelan Falls, Washington · 14240 days ago · 2 km deep · 81 km away
  13. 1.717 km SE of Royal City, Washington · 14238 days ago · 0 km deep · 96 km away
  14. 1.819 km WNW of Desert Aire, Washington · 14237 days ago · 2 km deep · 55 km away
  15. 1.516 km NNW of Vantage, Washington · 14235 days ago · 0 km deep · 41 km away
  16. 2.16 km SSE of Wilderness Rim, Washington · 14232 days ago · 1 km deep · 90 km away
  17. 2.616 km NNW of Vantage, Washington · 14232 days ago · 0 km deep · 40 km away
  18. 1.96 km SSE of Wilderness Rim, Washington · 14230 days ago · 1 km deep · 90 km away
  19. 2.025 km ENE of Ashford, Washington · 14219 days ago · -1 km deep · 89 km away

Before

  1. 1.57 km ESE of Ravensdale, Washington · 14278 days ago · -1 km deep · 99 km away
  2. 2.010 km WNW of Entiat, Washington · 14281 days ago · -1 km deep · 71 km away
  3. 2.24 km SW of Entiat, Washington · 14290 days ago · -1 km deep · 65 km away
  4. 1.66 km WSW of Easton, Washington · 14293 days ago · 20 km deep · 49 km away
  5. 1.85 km NE of Tanner, Washington · 14298 days ago · 13 km deep · 92 km away
  6. 1.52 km SE of Entiat, Washington · 14304 days ago · 3 km deep · 69 km away
  7. 1.625 km ENE of Ashford, Washington · 14304 days ago · 0 km deep · 89 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10224398. Read Tue, Sep 22, 2026, 10:47 AM UTC.