Information For a 5.9 Earthquake on 07/31/1987 near Petrolia, CA

An earthquake of magnitude 5.9 and depth of 17.70 kilometers occurred 6.51 miles from Petrolia, CA in Humboldt County at 11:56 PM.

07/31/1987 - Earthquake Incident Location
Earthquake Details
Location: 6.51 miles from Petrolia, CA in Humboldt County, CA
Date: 07/31/1987
Time: 11:56 PM
Magnitude: 5.9 Mag
Depth: 17.70 km
More Earthquake Incidents on 07/31/1987

Area Highlights

Natural Disasters Risk

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