Earthquake Information for Petersburg Census Area, Alaska

Petersburg Census Area, AK has a moderate earthquake risk, with a total of 132 earthquakes since 1931. The USGS database shows that there is a 6.21% chance of a major earthquake within 50km of Petersburg Census Area, AK within the next 50 years. The largest earthquake within 30 miles of Petersburg Census Area, AK was a 3.0 Magnitude in 2010.

Risk Level:
Moderate
Total Number of Earthquakes in Petersburg Census Area since 1931
132
Probability of A 5.0 Earthquake within next 50 years
6.21%

Earthquake Probability for Petersburg Census Area, AK

View the probability of a major earthquake within the next 50 years in Petersburg Census Area, AK.

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
6.21%
5.1
5.22%
5.2
5.22%
5.2
4.39%
5.3
3.69%
5.4
3.11%
5.5
2.63%
5.6
2.23%
5.7
1.90%
5.8
1.62%
5.9
1.39%
6.0
1.20%
6.1
1.00%
6.2
0.84%
6.3
0.70%
6.4
0.58%
6.5
0.48%
6.6
0.39%
6.7
0.31%
6.8
0.25%
6.9
0.18%
7.0
0.13%
7.1
0.08%
7.2
0.04%
7.3
0.00%
7.4
0.00%
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%