Harrisville Earthquake Information

Harrisville Earthquake Risk Grade

The USGS database shows that there is a 1.771% chance of a major earthquake within 50 miles of Harrisville, New Hampshire within the next 50 years. The largest earthquake within 50 miles of Harrisville, New Hampshire was a 4.7 Magnitude in 1982.

Probability of earthquakes within the next 50 years

Within 31 Miles / 50km above magnitude

Magnitude
Probability
5.0
1.771%
5.1
1.439%
5.2
1.439%
5.3
1.172%
5.4
0.956%
5.5
0.783%
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5.6
0.728%
5.7
0.599%
5.8
0.531%
5.9
0.440%
6.0
0.412%
6.1
0.335%
6.2
0.294%
6.3
0.232%
6.4
0.213%
6.5
0.167%
6.6
0.142%
6.7
0.129%
6.8
0.096%
6.9
0.079%
7.0
0.068%
7.1
0.043%
7.2
0.030%
7.3
0.023%
7.4
0.009%
7.5
0.002%
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.