Earthquake Information for Fort Lewis, Washington

Fort Lewis, WA has a very high earthquake risk, with a total of 601 earthquakes since 1931. The USGS database shows that there is a 89.64% chance of a major earthquake within 50km of Fort Lewis, WA within the next 50 years. The largest earthquake within 30 miles of Fort Lewis, WA was a 6.8 Magnitude in 2001.

Risk Level:
Very High
Total Number of Earthquakes in Fort Lewis since 1931 within 30 miles
601
Probability of A 5.0 Earthquake within next 50 years
89.64%

Earthquake Probability for Fort Lewis, WA

View the probability of a major earthquake within the next 50 years in Fort Lewis, 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
89.64%
5.1
86.22%
5.2
86.22%
5.2
82.38%
5.3
78.18%
5.4
73.74%
5.5
69.14%
5.6
64.48%
5.7
59.83%
5.8
55.26%
5.9
50.81%
6.0
46.55%
6.1
42.08%
6.2
37.81%
6.3
33.70%
6.4
29.82%
6.5
25.98%
6.6
21.80%
6.7
17.85%
6.8
13.92%
6.9
10.18%
7.0
6.57%
7.1
3.44%
7.2
0.43%
7.3
0.07%
7.4
0.02%
7.5
0.01%
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%