Earthquake Information for Index, Washington

Index, WA has a high earthquake risk, with a total of 741 earthquakes since 1931. The USGS database shows that there is a 64.87% chance of a major earthquake within 50km of Index, WA within the next 50 years. The largest earthquake within 30 miles of Index, WA was a 5.8 Magnitude in 1996.

Risk Level:
High
Total Number of Earthquakes in Index since 1931 within 30 miles
741
Probability of A 5.0 Earthquake within next 50 years
64.87%

Earthquake Probability for Index, WA

View the probability of a major earthquake within the next 50 years in Index, 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
64.87%
5.1
58.83%
5.2
58.83%
5.2
52.98%
5.3
47.44%
5.4
42.28%
5.5
37.57%
5.6
33.31%
5.7
29.51%
5.8
26.13%
5.9
23.17%
6.0
20.57%
6.1
18.00%
6.2
15.75%
6.3
13.74%
6.4
11.98%
6.5
10.40%
6.6
8.69%
6.7
7.15%
6.8
5.74%
6.9
4.60%
7.0
3.30%
7.1
2.25%
7.2
1.20%
7.3
0.63%
7.4
0.31%
7.5
0.15%
7.6
0.06%
7.7
0.02%
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%