Earthquake Information for Washington County, Oregon

Washington County, OR has a moderate earthquake risk, with a total of 11 earthquakes since 1931. The USGS database shows that there is a 28.22% chance of a major earthquake within 50km of Washington County, OR within the next 50 years. The largest earthquake within 30 miles of Washington County, OR was a 3.9 Magnitude in 2003.

Risk Level:
Moderate
Total Number of Earthquakes in Washington County since 1931
11
Probability of A 5.0 Earthquake within next 50 years
28.22%

Earthquake Probability for Washington County, OR

View the probability of a major earthquake within the next 50 years in Washington County, OR.

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
28.22%
5.1
25.39%
5.2
25.39%
5.2
22.96%
5.3
20.87%
5.4
19.09%
5.5
17.58%
5.6
16.30%
5.7
15.22%
5.8
14.32%
5.9
13.55%
6.0
12.92%
6.1
12.33%
6.2
11.68%
6.3
9.70%
6.4
9.28%
6.5
8.91%
6.6
7.29%
6.7
5.77%
6.8
4.41%
6.9
3.17%
7.0
1.97%
7.1
0.96%
7.2
0.03%
7.3
0.01%
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%