Chester Earthquake Information

Chester Earthquake Risk Grade

The USGS database shows that there is a 0.863% chance of a major earthquake within 50 miles of Chester, Montana within the next 50 years. The largest earthquake within 50 miles of Chester, Montana was a 4.2 Magnitude in 1994.

Probability of earthquakes within the next 50 years

Within 31 Miles / 50km above magnitude

Magnitude
Probability
5.0
0.863%
5.1
0.693%
5.2
0.692%
5.3
0.555%
5.4
0.445%
5.5
0.357%
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5.6
0.329%
5.7
0.263%
5.8
0.228%
5.9
0.182%
6.0
0.168%
6.1
0.128%
6.2
0.107%
6.3
0.078%
6.4
0.069%
6.5
0.047%
6.6
0.035%
6.7
0.028%
6.8
0.014%
6.9
0.007%
7.0
0.004%
7.1
0.001%
7.2
0.000%
7.3
0.000%
7.4
0.000%
7.5
0.000%
7.6
0.000%
7.7
0.000%
7.8
0.000%
7.9
0.000%
8.0
0.000%
8.1
0.000%
8.2
0.000%
8.3
0.000%
8.4
0.000%
8.5
0.000%
8.6
0.000%
8.7
0.000%
8.8
0.000%
8.9
0.000%
9.0
0.000%
9.1
0.000%
9.2
0.000%

Historical Earthquake Data (Within 50 Miles)

All distances and depths in the table below are measured in miles.