M1.5 earthquake 21 km NNW of Dillon, Montana
A magnitude 1.5 earthquake struck 21 km NNW of Dillon, Montana on Fri, Aug 7, 2015, 12:08 PM MDT (18:08 UTC), 11 km (7 mi) below the surface.
Automatic solution: the magnitude and location may still be revised.
A larger quake followed: M1.8 16 km NNE of Dillon, Montana. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.5 (mc), micro
- Local time
- UTC
- 2015-08-07 18:08:13 UTC
- Depth
- 10.8 km (6.7 mi), shallow
- Epicenter
- 45.390° N, 112.762° 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 0.4 km horizontally, 0.6 km in depth
- Magnitude uncertainty
- ±0.50
- Station coverage gap
- 187°, poorly surrounded by stations
- Stations used
- 11
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 4 in the 30 days before it.
After
- 1.816 km NNE of Dillon, Montana · 4063 days ago · 10 km deep · 13 km away
- 1.511 km NNE of Dillon, Montana · 4047 days ago · 10 km deep · 15 km away
- 1.520 km E of Lima, Montana · 4039 days ago · 0 km deep · 87 km away
- 2.97 km E of Lima, Montana · 4031 days ago · 6 km deep · 86 km away
- 2.37 km E of Lima, Montana · 4031 days ago · 7 km deep · 85 km away
- 1.78 km E of Lima, Montana · 4030 days ago · 8 km deep · 86 km away
- 2.119 km E of Lima, Montana · 4028 days ago · 5 km deep · 89 km away
- 1.632 km NNW of Lima, Montana · 4017 days ago · 11 km deep · 53 km away
Before
Earthquakes todayMontana earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event mb15431348. Read Tue, Sep 22, 2026, 8:45 PM UTC.