Idaho earthquakes

M3.5 earthquake 36 km ENE of Lima, Montana

A magnitude 3.5 earthquake struck 36 km ENE of Lima, Montana on Tue, Apr 23, 1985, 3:47 AM MST (10:47 UTC), 5 km (3 mi) below the surface.

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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
3.5 (ml), minor
Local time
UTC
1985-04-23 10:47:25 UTC
Depth
5.0 km (3.1 mi), shallow
Epicenter
44.706° N, 112.143° 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.

Depth from
OPERATOR_ASSIGNED

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 1.9Idaho-Montana border region · 15120 days ago · 12 km deep · 75 km away
  2. 1.62 km NNW of Hebgen Lake Estates, Montana · 15112 days ago · 13 km deep · 75 km away
  3. 1.614 km E of Hebgen Lake Estates, Montana · 15105 days ago · 10 km deep · 90 km away
  4. 3.125 km WNW of Lima, Montana · 15090 days ago · 5 km deep · 60 km away
  5. 1.66 km NE of West Yellowstone, Montana · 15084 days ago · 10 km deep · 87 km away
  6. 1.913 km E of Hebgen Lake Estates, Montana · 15083 days ago · 10 km deep · 89 km away
  7. 2.927 km NW of Lima, Montana · 15082 days ago · 5 km deep · 57 km away
  8. 3.028 km NNW of Lima, Montana · 15080 days ago · 5 km deep · 48 km away
  9. 2.113 km E of Hebgen Lake Estates, Montana · 15072 days ago · 11 km deep · 89 km away
  10. 1.613 km E of Hebgen Lake Estates, Montana · 15072 days ago · 11 km deep · 89 km away
  11. 1.614 km E of Hebgen Lake Estates, Montana · 15069 days ago · 8 km deep · 90 km away
  12. 1.514 km E of Hebgen Lake Estates, Montana · 15069 days ago · 11 km deep · 90 km away

Before

  1. 3.031 km WNW of Lima, Montana · 15140 days ago · 5 km deep · 63 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002e2j. Read Tue, Sep 22, 2026, 3:49 PM UTC.