Earthquake Information for Okanogan County, Washington

Okanogan County, WA has a moderate earthquake risk, with a total of 50 earthquakes since 1931. The USGS database shows that there is a 16.55% chance of a major earthquake within 50km of Okanogan County, WA within the next 50 years. The largest earthquake within 30 miles of Okanogan County, WA was a 4.4 Magnitude in 1989.

Risk Level:
Moderate
Total Number of Earthquakes in Okanogan County since 1931
50
Probability of A 5.0 Earthquake within next 50 years
16.55%

Earthquake Probability for Okanogan County, WA

View the probability of a major earthquake within the next 50 years in Okanogan 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
16.55%
5.1
14.01%
5.2
14.01%
5.2
11.83%
5.3
9.98%
5.4
8.41%
5.5
7.09%
5.6
5.97%
5.7
5.03%
5.8
4.24%
5.9
3.58%
6.0
3.02%
6.1
2.46%
6.2
1.99%
6.3
1.58%
6.4
1.24%
6.5
0.95%
6.6
0.71%
6.7
0.50%
6.8
0.31%
6.9
0.16%
7.0
0.01%
7.1
0.01%
7.2
0.00%
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%