Johnston Earthquake Information

Johnston Earthquake Risk Grade

The USGS database shows that there is a 1.338% chance of a major earthquake within 50 miles of Johnston, Rhode Island within the next 50 years. The largest earthquake within 50 miles of Johnston, Rhode Island was a 3.5 Magnitude in 1976.

Probability of earthquakes within the next 50 years

Within 31 Miles / 50km above magnitude

Magnitude
Probability
5.0
1.338%
5.1
1.087%
5.2
1.087%
5.3
0.884%
5.4
0.722%
5.5
0.591%
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5.6
0.549%
5.7
0.452%
5.8
0.401%
5.9
0.332%
6.0
0.311%
6.1
0.250%
6.2
0.218%
6.3
0.173%
6.4
0.159%
6.5
0.125%
6.6
0.107%
6.7
0.097%
6.8
0.072%
6.9
0.058%
7.0
0.050%
7.1
0.032%
7.2
0.022%
7.3
0.017%
7.4
0.007%
7.5
0.001%
7.6
0.001%
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.