Idaho earthquakes

M3.8 earthquake 10 km SE of Challis, Idaho

A magnitude 3.8 earthquake struck 10 km SE of Challis, Idaho on Mon, Jan 18, 2016, 11:29 PM MST (06:29 UTC), 8 km (5 mi) below the surface.

Challis forecastMore in Idaho

Map

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

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The earthquake

Magnitude
3.8 (ml), minor
Local time
UTC
2016-01-19 06:29:09 UTC
Depth
7.8 km (4.9 mi), shallow
Epicenter
44.451° N, 114.126° W
Region
Idaho
Felt reports
8
Strongest shaking
IV, light shaking
Tsunami flag
No
Status
Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated
IV, light shaking
Map
Automatic
USGS ShakeMap: estimated shaking intensity around the epicenter
Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

8 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 3.6 km horizontally, 5.8 km in depth
Magnitude uncertainty
±0.35
Station coverage gap
66°
Stations used
24

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 66 in the 60 days after this one and 18 in the 30 days before it.

After

The first 60 of 66.

Before

Earthquakes todayIdaho earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us10004fi9 (also filed as mb80120444). Read Wed, Sep 30, 2026, 2:59 AM UTC.