Earthquake Information for Portola, California

Portola, CA has a very high earthquake risk, with a total of 1,927 earthquakes since 1931. The USGS database shows that there is a 93.46% chance of a major earthquake within 50km of Portola, CA within the next 50 years. The largest earthquake within 30 miles of Portola, CA was a 5.2 Magnitude in 2001.

Risk Level:
Very High

Total Number of Earthquakes in Portola since 1931 within 30 miles

1,927

Probability of A 5.0 Earthquake within next 50 years

93.46%

Most Recent
Largest

4/21/2024 - 2.3 mag, 6.1mi depth 1.36826 mi from Cromberg, CA
3/17/2024 - 0.5 mag, 11.0mi depth 8.21156 mi from Sierraville, CA
3/4/2024 - 0.5 mag, 8.5mi depth 5.41573 mi from Cold Springs, NV
2/29/2024 - 2.4 mag, -1.3mi depth 8.10272 mi from Truckee, CA
2/25/2024 - 0.9 mag, 10.5mi depth 7.94798 mi from Truckee, CA
2/13/2024 - 1.0 mag, 4.0mi depth 1.33318 mi from Sattley, CA
2/6/2024 - 1.1 mag, 2.8mi depth 4.93927 mi from Sierraville, CA
2/5/2024 - 1.8 mag, 8.4mi depth 3.7015 mi from Sierra Brooks, CA
1/24/2024 - 1.3 mag, 11.6mi depth 5.43868 mi from Sierraville, CA
1/16/2024 - 2.1 mag, 6.5mi depth 3.83585 mi from Spring Garden, CA
12/11/2023 - 3.4 mag, -1.4mi depth 4.62585 mi from East Quincy, CA
12/6/2023 - 2.0 mag, 13.8mi depth 2.91349 mi from Whitehawk, CA
11/27/2023 - 2.0 mag, 0.2mi depth 4.1517 mi from Meadow Valley, CA
11/17/2023 - 1.8 mag, 7.4mi depth 3.38041 mi from Sierraville, CA
11/16/2023 - 1.5 mag, 3.9mi depth 1.51827 mi from Cold Springs, NV
11/8/2023 - 2.2 mag, 3.4mi depth 1.29465 mi from Johnsville, CA
11/5/2023 - 2.5 mag, -0.1mi depth 5.24822 mi from Cromberg, CA
10/16/2023 - 2.0 mag, 4.2mi depth 0.593894 mi from Whitehawk, CA
10/6/2023 - 1.6 mag, 2.2mi depth 6.70531 mi from Doyle, CA
10/6/2023 - 0.7 mag, 8.0mi depth 6.69914 mi from Doyle, CA
10/4/2023 - 1.4 mag, 7.2mi depth 0.705593 mi from Graeagle, CA
10/3/2023 - 1.5 mag, 2.4mi depth 3.05402 mi from Johnsville, CA
10/3/2023 - 1.4 mag, 4.2mi depth 1.1597 mi from Valley Ranch, CA
10/2/2023 - 2.6 mag, 25.3mi depth 2.76458 mi from Whitehawk, CA
10/2/2023 - 2.4 mag, -1.9mi depth 0.325217 mi from Valley Ranch, CA
9/29/2023 - 2.3 mag, -1.3mi depth 3.5117 mi from Loyalton, CA
9/27/2023 - 1.8 mag, 6.1mi depth 0.660968 mi from Whitehawk, CA
9/26/2023 - 1.8 mag, 6.8mi depth 2.42221 mi from Clio, CA
9/25/2023 - 2.9 mag, -1.5mi depth 0.540546 mi from Valley Ranch, CA
9/24/2023 - 1.2 mag, 8.0mi depth 4.79771 mi from Sierraville, CA
9/24/2023 - 1.6 mag, 3.6mi depth 0.460866 mi from Valley Ranch, CA
9/21/2023 - 2.6 mag, 15.5mi depth 2.98471 mi from Mohawk Vista, CA
9/20/2023 - 2.4 mag, 3.2mi depth 1.40378 mi from Iron Horse, CA
9/20/2023 - 2.8 mag, 0.0mi depth 0.636596 mi from Valley Ranch, CA
9/19/2023 - 1.4 mag, 0.0mi depth 1.11899 mi from Gold Mountain, CA
9/11/2023 - 2.6 mag, -1.1mi depth 4.84388 mi from Quincy, CA
9/11/2023 - 2.5 mag, -1.2mi depth 4.43384 mi from Quincy, CA
7/28/2023 - 1.1 mag, 1.7mi depth 5.81108 mi from Sierraville, CA
7/16/2023 - 2.4 mag, 12.9mi depth 8.85438 mi from Loyalton, CA
6/24/2023 - 0.8 mag, 7.2mi depth 4.99528 mi from Cold Springs, NV
6/23/2023 - 1.2 mag, 7.2mi depth 5.17584 mi from Cold Springs, NV
6/12/2023 - 1.4 mag, 6.3mi depth 5.51135 mi from Cold Springs, NV
6/11/2023 - 1.8 mag, 3.0mi depth 3.4361 mi from Cold Springs, NV
6/9/2023 - 2.1 mag, 1.4mi depth 6.1507 mi from Loyalton, CA
6/8/2023 - 1.4 mag, 6.4mi depth 5.53638 mi from Cold Springs, NV
6/8/2023 - 1.4 mag, 5.3mi depth 5.11178 mi from Cold Springs, NV
6/6/2023 - 1.4 mag, 13.2mi depth 5.50321 mi from Cold Springs, NV
6/6/2023 - 1.8 mag, 6.3mi depth 4.90286 mi from Cold Springs, NV
6/5/2023 - 1.2 mag, 7.3mi depth 5.4622 mi from Cold Springs, NV
6/4/2023 - 1.3 mag, 5.8mi depth 5.66133 mi from Cold Springs, NV

8/10/2001 - 5.2 mag, 17.8mi depth 1.9715 mi from Plumas Eureka, CA
2/22/1979 - 5.0 mag, 17.0mi depth 2.7176 mi from Doyle, CA
10/27/2011 - 4.7 mag, 16.0mi depth 2.3525 mi from Sattley, CA
9/29/1974 - 4.7 mag, 10.0mi depth 1.5239 mi from Spring Garden, CA
5/6/2021 - 4.7 mag, 3.3mi depth 9.44533 mi from Truckee, CA
11/15/1995 - 4.6 mag, 5.0mi depth 1.4344 mi from Cold Springs, NV
5/27/1974 - 4.6 mag, 2.0mi depth 4.4766 mi from East Quincy, CA
12/26/2008 - 4.5 mag, 0.0mi depth 4.0081 mi from East Quincy, CA
8/3/2016 - 4.4 mag, -2.1mi depth 19.8509 mi from Janesville, CA
8/3/2016 - 4.4 mag, 4.7mi depth 20.1731 mi from Janesville, CA
11/5/1997 - 4.3 mag, 5.0mi depth 3.3901 mi from Spring Garden, CA
6/18/1995 - 4.3 mag, 12.6mi depth 2.8619 mi from Cromberg, CA
12/25/1992 - 4.2 mag, 16.0mi depth 4.8703 mi from East Quincy, CA
2/17/1998 - 4.1 mag, 10.0mi depth 3.3053 mi from Lake Davis, CA
10/21/1998 - 4.1 mag, 16.0mi depth 1.5819 mi from Johnsville, CA
8/11/2001 - 4.1 mag, 18.3mi depth 2.6472 mi from Mohawk Vista, CA
6/1/2023 - 4.0 mag, 7.1mi depth 5.44257 mi from Cold Springs, NV
9/19/1992 - 4.0 mag, 13.0mi depth 2.2994 mi from Loyalton, CA
2/2/1996 - 4.0 mag, 5.0mi depth 5.5956 mi from Taylorsville, CA
2/19/1982 - 4.0 mag, 5.0mi depth 3.1912 mi from Greenhorn, CA
10/20/1992 - 4.0 mag, 8.0mi depth 5.3251 mi from Greenhorn, CA
11/24/1999 - 3.9 mag, 9.5mi depth 6.851 mi from Lake Davis, CA
6/27/2017 - 3.9 mag, -1.5mi depth 10.8486 mi from Truckee, CA
1/5/1982 - 3.9 mag, 5.0mi depth 1.2977 mi from Cromberg, CA
10/30/2011 - 3.8 mag, 15.1mi depth 2.1171 mi from Sattley, CA
12/27/1999 - 3.8 mag, 13.0mi depth 7.4736 mi from Lake Davis, CA
3/10/2020 - 3.8 mag, 7.7mi depth 8.58831 mi from Truckee, CA
6/15/1999 - 3.8 mag, 5.0mi depth 2.4518 mi from Gold Mountain, CA
12/26/2004 - 3.8 mag, 3.5mi depth 5.4572 mi from Spring Garden, CA
11/17/1995 - 3.8 mag, 5.0mi depth 1.1983 mi from Cold Springs, NV
2/23/1979 - 3.7 mag, 17.0mi depth 2.5957 mi from Doyle, CA
6/27/2017 - 3.7 mag, -1.5mi depth 10.8989 mi from Truckee, CA
6/15/1999 - 3.7 mag, 5.0mi depth 1.9767 mi from Whitehawk, CA
8/2/2016 - 3.7 mag, -2.0mi depth 19.6105 mi from Janesville, CA
11/14/1997 - 3.6 mag, 5.0mi depth 4.9372 mi from Sierraville, CA
11/1/1998 - 3.6 mag, 5.1mi depth 0.9288 mi from Graeagle, CA
10/14/1997 - 3.6 mag, 0.1mi depth 7.0603 mi from Sierra Brooks, CA
9/23/1992 - 3.6 mag, 17.0mi depth 0.8948 mi from Loyalton, CA
11/16/1995 - 3.6 mag, 5.0mi depth 2.0688 mi from Cold Springs, NV
1/5/1999 - 3.6 mag, 11.2mi depth 0.9288 mi from Graeagle, CA
11/15/1995 - 3.6 mag, 5.0mi depth 0.4017 mi from Cold Springs, NV
11/21/2010 - 3.6 mag, 8.2mi depth 2.2501 mi from Lake Davis, CA
11/21/2014 - 3.5 mag, 14.4mi depth 10.3978 mi from East Quincy, CA
2/22/1979 - 3.5 mag, 17.0mi depth 2.4401 mi from Doyle, CA
8/23/1998 - 3.5 mag, 3.3mi depth 1.0334 mi from East Quincy, CA
3/24/2011 - 3.5 mag, 11.0mi depth 4.2673 mi from Doyle, CA
8/10/2010 - 3.5 mag, 9.2mi depth 1.9888 mi from Lake Davis, CA
1/2/1981 - 3.5 mag, 5.0mi depth 0.1689 mi from Mabie, CA
11/16/1996 - 3.4 mag, 5.0mi depth 2.0488 mi from Cold Springs, NV
12/11/2023 - 3.4 mag, -1.4mi depth 4.62585 mi from East Quincy, CA

View All

Earthquake Probability for Portola, CA

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

Probability of Earthquakes Within the Next 50 Years For Magnitudes Between 5.0 and 9.2

(within 31 km/51 miles above magnitude)

5.0

93.46%

5.1

89.97%

5.2

89.97%

5.2

85.67%

5.3

80.73%

5.4

75.34%

5.5

69.73%

5.6

64.10%

5.7

58.63%

5.8

53.45%

5.9

48.65%

6.0

44.28%

6.1

39.86%

6.2

35.76%

6.3

31.58%

6.4

27.38%

6.5

23.52%

6.6

19.96%

6.7

16.60%

6.8

13.07%

6.9

9.76%

7.0

6.43%

7.1

4.54%

7.2

3.21%

7.3

2.18%

7.4

1.32%

7.5

0.60%

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%

Earthquake Count for Portola, CA

View the number of earthquake incidents in Portola, CA by year that are more than 2.5 Magnitude.

List of Earthquake Incidents for Portola, CA

Total Number of Earthquakes in Portola, CA within 30 miles. All distances and depths in the table are measured in miles.

04/21/2024

2.3

6.1

1.37

Earthquake Information for Portola, California

Earthquake Probability for Portola, CA

Probability of Earthquakes Within the Next 50 Years For Magnitudes Between 5.0 and 9.2

Earthquake Count for Portola, CA

List of Earthquake Incidents for Portola, CA

Risk Of Natural Disasters In Portola, CA

Related Pages