M 4.5 - 15 km NW of Three Forks, Montana
- 1977-08-27 05:23:49 (UTC)
- 45.999°N 111.690°W
- 10.0 km depth
Interactive Map Regional Information Felt Report - Tell Us! 000000Responses Contribute to citizen science. Please tell us about your experience.
Origin - Review Status
- REVIEWED
- Magnitude
- 4.5 mb
- Depth
- 10.0 km
- Time
- 1977-08-27 05:23:49 UTC
View Nearby Seismicity - Time Range
± Three Weeks - Search Radius
250.0 km - Magnitude Range
≥ 1.0
Contributors US
USGS National Earthquake Information Center, PDE