M 4.6 - 23 km WSW of Weott, California
- 1981-07-17 16:37:32 (UTC)
- 40.228°N 124.169°W
- 10.3 km depth
FELT (V) AT HONEYDEW, PETROLIA, PHILLIPSVILLE AND RIO DELL. FELT (IV) IN MANY OTHER AREAS OF HUMBOLDT COUNTY.
Maximum observed Modified Mercalli Intensity (MMI) VI