Earthquake Information for Altadena, California

Altadena, CA has a very high earthquake risk, with a total of 6,123 earthquakes since 1931. The USGS database shows that there is a 97.50% chance of a major earthquake within 50km of Altadena, CA within the next 50 years. The largest earthquake within 30 miles of Altadena, CA was a 6.7 Magnitude in 1994.

Risk Level:
Very High
Total Number of Earthquakes in Altadena since 1931 within 50 miles
6,123
Probability of A 5.0 Earthquake within next 50 years
97.50%

Earthquake Probability for Altadena, CA

View the probability of a major earthquake within the next 50 years in Altadena, 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
97.50%
5.1
96.26%
5.2
96.26%
5.2
94.79%
5.3
93.13%
5.4
91.36%
5.5
89.54%
5.6
87.73%
5.7
86.00%
5.8
84.37%
5.9
82.87%
6.0
81.52%
6.1
80.13%
6.2
78.87%
6.3
77.50%
6.4
74.14%
6.5
66.55%
6.6
59.16%
6.7
51.71%
6.8
46.32%
6.9
42.15%
7.0
38.31%
7.1
35.64%
7.2
32.75%
7.3
29.58%
7.4
26.56%
7.5
23.39%
7.6
20.31%
7.7
16.54%
7.8
12.39%
7.9
8.22%
8.0
4.43%
8.1
1.71%
8.2
0.30%
8.3
0.06%
8.4
0.01%
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%