Montana earthquakes

M3.5 earthquake 16 km SSE of Harrison, Montana

A magnitude 3.5 earthquake struck 16 km SSE of Harrison, Montana on Wed, Jul 22, 1987, 12:18 AM MDT (06:18 UTC), 7 km (5 mi) below the surface.

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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
3.5 (ml), minor
Local time
UTC
1987-07-22 06:18:52 UTC
Depth
7.3 km (4.5 mi), shallow
Epicenter
45.566° N, 111.691° W
Region
Montana
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 31 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 3.118 km SSE of Harrison, Montana · 14307 days ago · 5 km deep · 2 km away
  2. 2.517 km SSE of Harrison, Montana · 14307 days ago · 3 km deep · 1 km away
  3. 3.117 km SSE of Harrison, Montana · 14307 days ago · 5 km deep · 1 km away
  4. 2.616 km SSE of Harrison, Montana · 14307 days ago · 5 km deep · 0 km away
  5. 2.616 km SSE of Harrison, Montana · 14307 days ago · 5 km deep · 0 km away
  6. 3.117 km SSE of Harrison, Montana · 14307 days ago · 4 km deep · 1 km away
  7. 2.717 km SSE of Harrison, Montana · 14307 days ago · 4 km deep · 1 km away
  8. 3.216 km SSE of Harrison, Montana · 14307 days ago · 4 km deep · 1 km away
  9. 3.217 km SSE of Harrison, Montana · 14307 days ago · 4 km deep · 1 km away
  10. 2.615 km SSE of Harrison, Montana · 14307 days ago · 8 km deep · 2 km away
  11. 3.319 km SSE of Harrison, Montana · 14306 days ago · 5 km deep · 3 km away
  12. 2.719 km SSE of Harrison, Montana · 14300 days ago · 4 km deep · 3 km away
  13. 3.018 km SSE of Harrison, Montana · 14299 days ago · 4 km deep · 2 km away
  14. 2.716 km SSE of Harrison, Montana · 14299 days ago · 3 km deep · 2 km away
  15. 2.719 km SSE of Harrison, Montana · 14298 days ago · 4 km deep · 2 km away
  16. 3.019 km SSE of Harrison, Montana · 14294 days ago · 3 km deep · 3 km away
  17. 3.119 km SSE of Harrison, Montana · 14294 days ago · 3 km deep · 3 km away
  18. 2.817 km SSE of Harrison, Montana · 14290 days ago · 3 km deep · 2 km away
  19. 2.017 km SSE of Harrison, Montana · 14290 days ago · 3 km deep · 2 km away
  20. 2.819 km SSE of Harrison, Montana · 14288 days ago · 4 km deep · 2 km away
  21. 2.817 km SSE of Harrison, Montana · 14286 days ago · 4 km deep · 1 km away
  22. 3.520 km SSE of Harrison, Montana · 14278 days ago · 5 km deep · 4 km away
  23. 3.011 km SSE of Harrison, Montana · 14278 days ago · 2 km deep · 5 km away
  24. 3.419 km SSE of Harrison, Montana · 14278 days ago · 6 km deep · 3 km away
  25. 2.718 km SSE of Harrison, Montana · 14277 days ago · 5 km deep · 2 km away
  26. 2.518 km SSE of Harrison, Montana · 14276 days ago · 5 km deep · 2 km away
  27. 2.919 km SSE of Harrison, Montana · 14275 days ago · 6 km deep · 3 km away
  28. 2.519 km SSE of Harrison, Montana · 14273 days ago · 6 km deep · 3 km away
  29. 2.116 km SSE of Harrison, Montana · 14270 days ago · 4 km deep · 0 km away
  30. 2.615 km SSE of Harrison, Montana · 14265 days ago · 4 km deep · 1 km away
  31. 2.617 km SSE of Harrison, Montana · 14261 days ago · 3 km deep · 3 km away

Before

  1. 2.615 km SSE of Harrison, Montana · 14307 days ago · 3 km deep · 2 km away
  2. 3.118 km SSE of Harrison, Montana · 14307 days ago · 4 km deep · 2 km away
  3. 4.018 km SSE of Harrison, Montana · 14307 days ago · 4 km deep · 2 km away
  4. 3.018 km SSE of Harrison, Montana · 14307 days ago · 4 km deep · 2 km away
  5. 3.219 km SSE of Harrison, Montana · 14307 days ago · 6 km deep · 3 km away
  6. 2.817 km SSE of Harrison, Montana · 14308 days ago · 3 km deep · 2 km away
  7. 3.416 km SSE of Harrison, Montana · 14308 days ago · 2 km deep · 1 km away
  8. 3.618 km SSE of Harrison, Montana · 14308 days ago · 5 km deep · 1 km away
  9. 2.614 km SSE of Harrison, Montana · 14311 days ago · 8 km deep · 2 km away
  10. 2.714 km SSE of Harrison, Montana · 14312 days ago · 8 km deep · 2 km away
  11. 2.814 km SSE of Harrison, Montana · 14312 days ago · 6 km deep · 2 km away
  12. 3.416 km SSE of Harrison, Montana · 14314 days ago · 3 km deep · 1 km away
  13. 2.516 km SSE of Harrison, Montana · 14316 days ago · 3 km deep · 3 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00036ut. Read Tue, Sep 22, 2026, 8:55 AM UTC.