3.9 magnitude earthquake 4 km from Helena Valley Northwest, Montana, United States

1975-07-18 15:06:22 UTC

UTC time: Friday, July 18, 1975 15:06 PM
Your time: 1975-07-18T15:06:22Z
Magnitude Type: ml
USGS page: M 3.9 - western Montana
USGS status: Reviewed by a seismologist
Reports from the public: 0 people