Earthquake Information for Orange County, California

Orange County, CA has a very high earthquake risk, with a total of 7,308 earthquakes since 1931. The USGS database shows that there is a 95.31% chance of a major earthquake within 50km of Orange County, CA within the next 50 years. The largest earthquake within 30 miles of Orange County, CA was a 5.5 Magnitude in 2015.

Risk Level:
Very High
Total Number of Earthquakes in Orange County since 1931 within 50 miles
7,308
Probability of A 5.0 Earthquake within next 50 years
95.31%

Earthquake Probability for Orange County, CA

View the probability of a major earthquake within the next 50 years in Orange County, CA.

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
95.31%
5.1
92.96%
5.2
92.96%
5.2
90.14%
5.3
86.94%
5.4
83.50%
5.5
79.96%
5.6
76.44%
5.7
73.05%
5.8
69.86%
5.9
66.92%
6.0
64.26%
6.1
61.57%
6.2
59.15%
6.3
56.77%
6.4
52.64%
6.5
44.66%
6.6
38.93%
6.7
33.01%
6.8
27.58%
6.9
22.69%
7.0
17.89%
7.1
14.11%
7.2
10.84%
7.3
8.18%
7.4
6.07%
7.5
4.04%
7.6
2.76%
7.7
1.58%
7.8
0.65%
7.9
0.17%
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%