Idaho earthquakes

M1.5 earthquake 20 km E of Lima, Montana

A magnitude 1.5 earthquake struck 20 km E of Lima, Montana on Tue, Sep 1, 2015, 5:42 AM MDT (11:42 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M2.9 7 km E of Lima, Montana. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.5 (Md, duration), micro
Magnitude from
Montana Bureau of Mines and Geology
Local time
UTC
2015-09-01 11:42:36 UTC
Depth
-0.1 km (-0.1 mi), shallow
Epicenter
44.668° N, 112.331° W
Region
Idaho
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.3 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
51°
Stations used
20

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 2.97 km E of Lima, Montana · 4041 days ago · 6 km deep · 13 km away
  2. 2.37 km E of Lima, Montana · 4041 days ago · 7 km deep · 14 km away
  3. 1.78 km E of Lima, Montana · 4040 days ago · 8 km deep · 12 km away
  4. 2.119 km E of Lima, Montana · 4038 days ago · 5 km deep · 3 km away
  5. 1.540 km NNE of Spencer, Idaho · 4037 days ago · 12 km deep · 33 km away
  6. 1.632 km NNW of Lima, Montana · 4027 days ago · 11 km deep · 41 km away
  7. 1.69 km E of Hebgen Lake Estates, Montana · 4026 days ago · 12 km deep · 100 km away
  8. 1.53 km SE of Hebgen Lake Estates, Montana · 4008 days ago · 9 km deep · 93 km away
  9. 2.13 km ENE of Hebgen Lake Estates, Montana · 4007 days ago · 14 km deep · 94 km away

Before

  1. 3.432 km W of Hebgen Lake Estates, Montana · 4057 days ago · 11 km deep · 60 km away
  2. 1.511 km NNE of Dillon, Montana · 4057 days ago · 10 km deep · 75 km away
  3. 1.530 km WNW of Hebgen Lake Estates, Montana · 4057 days ago · 7 km deep · 63 km away
  4. 1.726 km W of Hebgen Lake Estates, Montana · 4059 days ago · 10 km deep · 66 km away
  5. 2.329 km WNW of Hebgen Lake Estates, Montana · 4072 days ago · 7 km deep · 65 km away
  6. 1.816 km NNE of Dillon, Montana · 4073 days ago · 10 km deep · 80 km away
  7. 1.521 km NNW of Dillon, Montana · 4074 days ago · 11 km deep · 87 km away
  8. 1.539 km NNE of Spencer, Idaho · 4075 days ago · 8 km deep · 33 km away
  9. 1.913 km N of Dillon, Montana · 4075 days ago · 10 km deep · 77 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80095879. Read Fri, Oct 2, 2026, 9:18 PM UTC.