Earthquake Information for Cowlitz County, Washington

Cowlitz County, WA has a high earthquake risk, with a total of 10 earthquakes since 1931. The USGS database shows that there is a 43.22% chance of a major earthquake within 50km of Cowlitz County, WA within the next 50 years. The largest earthquake within 30 miles of Cowlitz County, WA was a 5.3 Magnitude in 1980.

Risk Level:
High
Total Number of Earthquakes in Cowlitz County since 1931
10
Probability of A 5.0 Earthquake within next 50 years
43.22%

Earthquake Probability for Cowlitz County, WA

View the probability of a major earthquake within the next 50 years in Cowlitz County, WA.

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
43.22%
5.1
38.26%
5.2
38.26%
5.2
33.78%
5.3
29.79%
5.4
26.26%
5.5
23.17%
5.6
20.48%
5.7
18.15%
5.8
16.14%
5.9
14.41%
6.0
12.94%
6.1
11.55%
6.2
10.35%
6.3
9.31%
6.4
8.39%
6.5
7.58%
6.6
6.21%
6.7
4.95%
6.8
3.77%
6.9
2.67%
7.0
1.63%
7.1
0.86%
7.2
0.10%
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%