M2.1 earthquake 5 km E of Boulder, Montana
A magnitude 2.1 earthquake struck 5 km E of Boulder, Montana on Tue, Mar 17, 2015, 6:00 AM MDT (12:00 UTC), 9 km (6 mi) below the surface.
Automatic solution: the magnitude and location may still be revised.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.1 (Mc), micro
- Magnitude from
- Montana Bureau of Mines and Geology
- Local time
- UTC
- 2015-03-17 12:00:55 UTC
- Depth
- 9.3 km (5.8 mi), shallow
- Epicenter
- 46.233° N, 112.043° W
- Region
- Montana
- Tsunami flag
- No
- Status
- Automatic solution, may be revised
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
An automatic solution; a seismologist may revise it.
- Location uncertainty
- About 0.5 km horizontally, 1.5 km in depth
- Magnitude uncertainty
- ±0.50
- Station coverage gap
- 79°
- Stations used
- 22
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 3 in the 30 days before it.
After
- 1.913 km SE of Lincoln, Montana · 4212 days ago · 15 km deep · 82 km away
- 1.75 km SSE of Boulder, Montana · 4188 days ago · 13 km deep · 7 km away
- 1.717 km NNE of Helena Valley Northwest, Montana · 4184 days ago · 10 km deep · 72 km away
- 1.717 km ENE of Townsend, Montana · 4179 days ago · 6 km deep · 59 km away
- 1.619 km ENE of Townsend, Montana · 4179 days ago · 11 km deep · 60 km away
- 1.612 km W of Clancy, Montana · 4167 days ago · 12 km deep · 27 km away
Before
Earthquakes todayMontana earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event mb15751490. Read Sat, Oct 3, 2026, 12:45 PM UTC.