Information For a 3.1 Earthquake on 07/22/1987 near Harrison, MT

An earthquake of magnitude 3.1 and depth of 3.90 kilometers occurred 11.22 miles from Harrison, MT in Madison County at 03:47 PM.

07/22/1987 - Earthquake Incident Location
Earthquake Details
Location: 11.22 miles from Harrison, MT in Madison County, MT
Date: 07/22/1987
Time: 03:47 PM
Magnitude: 3.1 Mag
Depth: 3.90 km
More Earthquake Incidents on 07/22/1987

Area Highlights

Natural Disasters Risk

  • Hail Risk Hail Risk is Very Low
  • Tornados Tornado Risk is Very Low
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