Information For a 3.4 Earthquake on 07/21/1987 near Harrison, MT

An earthquake of magnitude 3.4 and depth of 2.00 kilometers occurred 10.28 miles from Harrison, MT in Madison County at 08:38 PM.

07/21/1987 - Earthquake Incident Location
Earthquake Details
Location: 10.28 miles from Harrison, MT in Madison County, MT
Date: 07/21/1987
Time: 08:38 PM
Magnitude: 3.4 Mag
Depth: 2.00 km
More Earthquake Incidents on 07/21/1987

Area Highlights

Natural Disasters Risk

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