Earthquake Information for Custer County, Idaho

Custer County, ID has a very high earthquake risk, with a total of 1,058 earthquakes since 1931. The USGS database shows that there is a 83.39% chance of a major earthquake within 50km of Custer County, ID within the next 50 years. The largest earthquake within 30 miles of Custer County, ID was a 7.0 Magnitude in 1983.

Risk Level:
Very High
Total Number of Earthquakes in Custer County since 1931
1,058
Probability of A 5.0 Earthquake within next 50 years
83.39%

Earthquake Probability for Custer County, ID

View the probability of a major earthquake within the next 50 years in Custer County, ID.

Probability of Earthquakes Within the Next 50 Years For Magnitudes Between 5.0 and 9.2
(within 31 km/51 miles above magnitude)
MAGNITUDE
PROBABILITY
5.0
83.39%
5.1
77.76%
5.2
77.76%
5.2
71.66%
5.3
65.32%
5.4
58.98%
5.5
52.84%
5.6
47.03%
5.7
41.66%
5.8
36.78%
5.9
32.41%
6.0
28.55%
6.1
24.57%
6.2
21.10%
6.3
18.04%
6.4
15.41%
6.5
13.06%
6.6
10.35%
6.7
7.87%
6.8
6.05%
6.9
3.59%
7.0
0.91%
7.1
0.41%
7.2
0.14%
7.3
0.04%
7.4
0.01%
7.5
0.00%
7.6
0.00%
7.7
0.00%
7.8
0.00%
7.9
0.00%
8.0
0.00%
8.1
0.00%
8.2
0.00%
8.3
0.00%
8.4
0.00%
8.5
0.00%
8.6
0.00%
8.7
0.00%
8.8
0.00%
8.9
0.00%
9.0
0.00%
9.1
0.00%
9.2
0.00%