Earthquake Information for Contra Costa County, California

Contra Costa County, CA has a very high earthquake risk, with a total of 400 earthquakes since 1931. The USGS database shows that there is a 98.42% chance of a major earthquake within 50km of Contra Costa County, CA within the next 50 years. The largest earthquake within 30 miles of Contra Costa County, CA was a 6.0 Magnitude in 2014.

Risk Level:
Very High

Total Number of Earthquakes in Contra Costa County since 1931

400

Probability of A 5.0 Earthquake within next 50 years

98.42%

Most Recent
Largest

4/13/2024 - 0.9 mag, 9.5mi depth 1 mi from East Richmond Heights, CA
4/13/2024 - 1.3 mag, 12.4mi depth 2 mi from Pleasant Hill, CA
4/12/2024 - 1.8 mag, 4.8mi depth 1 mi from Orinda, CA
4/12/2024 - 1.7 mag, 4.1mi depth 0 mi from Orinda, CA
4/7/2024 - 1.4 mag, 5.8mi depth 7 mi from Brentwood, CA
4/7/2024 - 1.8 mag, 19.0mi depth 7 mi from Brentwood, CA
4/6/2024 - 1.6 mag, 7.0mi depth 1 mi from Walnut Creek, CA
4/4/2024 - 1.7 mag, 12.2mi depth 1 mi from Pacheco, CA
4/1/2024 - 2.0 mag, 12.3mi depth 5 mi from Clayton, CA
3/29/2024 - 1.5 mag, 9.2mi depth 1 mi from East Richmond Heights, CA
3/25/2024 - 1.8 mag, 15.0mi depth 7 mi from Blackhawk, CA
3/23/2024 - 2.1 mag, 13.8mi depth 9 mi from Pittsburg, CA
3/22/2024 - 0.7 mag, 7.2mi depth 2 mi from Alamo, CA
3/22/2024 - 2.6 mag, 10.7mi depth 3 mi from Pleasant Hill, CA
3/21/2024 - 1.5 mag, 7.4mi depth 2 mi from Bethel Island, CA
3/18/2024 - 1.4 mag, 8.0mi depth 2 mi from Alamo, CA
3/18/2024 - 1.9 mag, 7.9mi depth 2 mi from Alamo, CA
3/17/2024 - 1.8 mag, 15.2mi depth 2 mi from Pacheco, CA
3/14/2024 - 1.0 mag, 16.4mi depth 162 mi from San Miguel, CA
3/7/2024 - 1.4 mag, 6.7mi depth 2 mi from Pleasant Hill, CA
3/4/2024 - 2.3 mag, 13.8mi depth 1 mi from Walnut Creek, CA
3/3/2024 - 1.0 mag, 9.9mi depth 2 mi from Alamo, CA
3/2/2024 - 1.5 mag, 9.9mi depth 2 mi from Alamo, CA
2/29/2024 - 3.0 mag, 1.8mi depth 1 mi from Discovery Bay, CA
2/28/2024 - 1.8 mag, 11.8mi depth 5 mi from Brentwood, CA
2/28/2024 - 3.8 mag, 11.6mi depth 0 mi from Discovery Bay, CA
2/28/2024 - 2.4 mag, 4.0mi depth 1 mi from Byron, CA
2/27/2024 - 0.8 mag, -0.3mi depth 2 mi from Clayton, CA
2/26/2024 - 2.2 mag, 5.4mi depth 0 mi from San Pablo, CA
2/25/2024 - 1.1 mag, 8.0mi depth 2 mi from Orinda, CA
2/22/2024 - 1.3 mag, 6.1mi depth 1 mi from Kensington, CA
2/20/2024 - 1.7 mag, 8.9mi depth 4 mi from Clayton, CA
2/20/2024 - 2.4 mag, 14.7mi depth 2 mi from Concord, CA
2/20/2024 - 1.5 mag, 13.8mi depth 2 mi from Pleasant Hill, CA
2/17/2024 - 1.2 mag, 7.3mi depth 1 mi from Pleasant Hill, CA
2/10/2024 - 1.2 mag, 11.2mi depth 2 mi from Alamo, CA
2/8/2024 - 1.5 mag, 0.8mi depth 0 mi from El Cerrito, CA
2/8/2024 - 1.3 mag, 9.1mi depth 2 mi from Alamo, CA
2/6/2024 - 2.2 mag, 11.1mi depth 5 mi from Brentwood, CA
2/2/2024 - 1.2 mag, 8.8mi depth 1 mi from Pacheco, CA
1/24/2024 - 1.5 mag, 10.2mi depth 1 mi from Pacheco, CA
1/24/2024 - 2.0 mag, 4.4mi depth 5 mi from Pittsburg, CA
1/23/2024 - 1.6 mag, 12.1mi depth 1 mi from Pacheco, CA
1/22/2024 - 1.3 mag, 11.7mi depth 1 mi from Pacheco, CA
1/22/2024 - 1.7 mag, 14.6mi depth 7 mi from Bay Point, CA
1/16/2024 - 1.0 mag, 3.6mi depth 0 mi from El Cerrito, CA
1/16/2024 - 1.9 mag, 9.3mi depth 1 mi from Crockett, CA
1/14/2024 - 1.9 mag, 15.7mi depth 1 mi from Pacheco, CA
1/13/2024 - 1.6 mag, 11.4mi depth 5 mi from Moraga, CA
1/12/2024 - 2.3 mag, 8.2mi depth 1 mi from El Cerrito, CA
1/12/2024 - 2.1 mag, 14.5mi depth 0 mi from Pacheco, CA
1/9/2024 - 1.8 mag, 12.9mi depth 1 mi from Pacheco, CA
1/7/2024 - 1.5 mag, 10.0mi depth 6 mi from San Ramon, CA
1/6/2024 - 1.4 mag, 9.9mi depth 6 mi from San Ramon, CA
1/5/2024 - 2.0 mag, 13.5mi depth 2 mi from Concord, CA
1/1/2024 - 1.3 mag, 11.6mi depth 1 mi from Martinez, CA
12/29/2023 - 1.2 mag, 8.6mi depth 2 mi from Alamo, CA
12/24/2023 - 1.4 mag, 10.7mi depth 2 mi from Orinda, CA
12/24/2023 - 1.4 mag, 8.5mi depth 3 mi from San Ramon, CA
12/23/2023 - 1.9 mag, 8.9mi depth 3 mi from San Ramon, CA
12/23/2023 - 1.8 mag, 9.0mi depth 3 mi from San Ramon, CA
12/21/2023 - 1.7 mag, 6.9mi depth 4 mi from Lafayette, CA
12/21/2023 - 1.4 mag, 8.6mi depth 3 mi from San Ramon, CA
12/15/2023 - 2.3 mag, 9.6mi depth 3 mi from San Ramon, CA
12/10/2023 - 1.4 mag, 6.9mi depth 1 mi from Rodeo, CA
11/28/2023 - 1.4 mag, 7.4mi depth 2 mi from Orinda, CA
11/21/2023 - 1.3 mag, 8.1mi depth 1 mi from Pleasant Hill, CA
11/12/2023 - 1.3 mag, 7.1mi depth 1 mi from Lafayette, CA
11/8/2023 - 2.0 mag, 14.6mi depth 2 mi from Pleasant Hill, CA
11/7/2023 - 1.2 mag, 22.5mi depth 1 mi from Concord, CA
11/4/2023 - 1.5 mag, 7.4mi depth 4 mi from San Ramon, CA
11/4/2023 - 1.5 mag, 7.4mi depth 4 mi from San Ramon, CA
11/1/2023 - 1.3 mag, 14.0mi depth 1 mi from Pacheco, CA
10/31/2023 - 2.7 mag, 16.6mi depth 2 mi from Concord, CA
10/30/2023 - 1.4 mag, 10.7mi depth 2 mi from Concord, CA
10/30/2023 - 1.6 mag, 5.2mi depth 1 mi from Blackhawk, CA
10/29/2023 - 1.3 mag, 4.9mi depth 2 mi from Orinda, CA
10/27/2023 - 1.4 mag, 4.4mi depth 4 mi from Moraga, CA
10/22/2023 - 1.2 mag, 14.4mi depth 3 mi from El Sobrante, CA
10/19/2023 - 2.1 mag, 4.7mi depth 2 mi from Pinole, CA
10/17/2023 - 1.6 mag, 8.1mi depth 4 mi from San Ramon, CA
10/14/2023 - 1.3 mag, 9.4mi depth 2 mi from Alamo, CA
10/13/2023 - 2.0 mag, 13.8mi depth 1 mi from Pacheco, CA
10/13/2023 - 1.0 mag, 11.9mi depth 1 mi from Pacheco, CA
10/11/2023 - 1.7 mag, 12.2mi depth 1 mi from Pacheco, CA
10/11/2023 - 2.0 mag, 10.1mi depth 3 mi from San Ramon, CA
10/10/2023 - 1.9 mag, 7.3mi depth 2 mi from Orinda, CA
10/9/2023 - 1.6 mag, 7.5mi depth 1 mi from Diablo, CA
10/5/2023 - 1.4 mag, 7.0mi depth 1 mi from Diablo, CA
10/5/2023 - 1.5 mag, 6.8mi depth 1 mi from Diablo, CA
10/1/2023 - 2.0 mag, 14.0mi depth 4 mi from Byron, CA
10/1/2023 - 1.1 mag, 8.4mi depth 4 mi from Clayton, CA
9/30/2023 - 1.6 mag, 2.3mi depth 4 mi from Orinda, CA
9/28/2023 - 1.0 mag, 6.9mi depth 2 mi from Rodeo, CA
9/27/2023 - 1.3 mag, 6.2mi depth 1 mi from Walnut Creek, CA
9/26/2023 - 2.0 mag, 0.9mi depth 6 mi from Blackhawk, CA
9/15/2023 - 1.3 mag, 11.5mi depth 1 mi from Pacheco, CA
8/27/2023 - 1.2 mag, 4.8mi depth 2 mi from Alamo, CA
8/27/2023 - 1.2 mag, 6.5mi depth 4 mi from Martinez, CA
8/26/2023 - 1.2 mag, 14.8mi depth 1 mi from Pacheco, CA

1/8/1977 - 4.8 mag, 10.0mi depth 2 mi from Orinda, CA
10/11/1986 - 4.7 mag, 7.0mi depth 1 mi from Diablo, CA
4/7/1990 - 4.5 mag, 1.0mi depth 2 mi from Alamo, CA
10/14/2019 - 4.5 mag, 14.6mi depth 2 mi from Pleasant Hill, CA
7/16/2019 - 4.3 mag, 12.2mi depth 8 mi from Blackhawk, CA
5/11/1987 - 4.3 mag, 4.0mi depth 2 mi from Canyon, CA
4/28/1990 - 4.3 mag, 6.0mi depth 2 mi from North Gate, CA
6/26/1994 - 4.2 mag, 7.4mi depth 1 mi from Kensington, CA
3/2/2007 - 4.2 mag, 16.2mi depth 1 mi from Lafayette, CA
1/25/1980 - 4.2 mag, 6.0mi depth 7 mi from Camino Tassajara, CA
1/25/1980 - 4.2 mag, 8.0mi depth 7 mi from Blackhawk, CA
1/25/1980 - 4.2 mag, 9.0mi depth 7 mi from Brentwood, CA
4/28/1990 - 4.2 mag, 5.0mi depth 1 mi from Alamo, CA
7/20/2007 - 4.2 mag, 5.3mi depth 2 mi from Canyon, CA
6/2/2022 - 4.1 mag, 19.7mi depth 3 mi from Bay Point, CA
2/2/2003 - 4.1 mag, 16.7mi depth 1 mi from San Ramon, CA
1/8/1977 - 4.1 mag, 10.0mi depth 2 mi from Orinda, CA
2/2/2003 - 4.1 mag, 16.9mi depth 1 mi from San Ramon, CA
10/22/1987 - 4.1 mag, 7.0mi depth 7 mi from Byron, CA
1/27/1980 - 4.1 mag, 13.0mi depth 6 mi from Camino Tassajara, CA
9/6/2008 - 4.1 mag, 16.2mi depth 1 mi from Alamo, CA
5/3/2015 - 4.0 mag, 14.6mi depth 2 mi from Concord, CA
8/20/1976 - 4.0 mag, 7.0mi depth 1 mi from Danville, CA
3/29/1986 - 4.0 mag, 9.0mi depth 2 mi from Orinda, CA
1/8/1977 - 4.0 mag, 10.0mi depth 2 mi from Orinda, CA
1/25/1980 - 4.0 mag, 9.0mi depth 7 mi from Camino Tassajara, CA
1/25/1980 - 4.0 mag, 10.0mi depth 6 mi from Blackhawk, CA
3/16/2014 - 4.0 mag, 24.4mi depth 244 mi from Bayview, CA
3/5/2012 - 4.0 mag, 8.1mi depth 1 mi from El Cerrito, CA
6/22/1989 - 4.0 mag, 16.0mi depth 3 mi from Pittsburg, CA
8/20/1976 - 3.9 mag, 2.0mi depth 1 mi from San Ramon, CA
12/4/1998 - 3.9 mag, 6.9mi depth 1 mi from Kensington, CA
11/24/2002 - 3.9 mag, 11.2mi depth 1 mi from San Ramon, CA
8/28/1982 - 3.8 mag, 15.0mi depth 7 mi from Camino Tassajara, CA
11/17/2021 - 3.8 mag, 10.9mi depth 3 mi from San Ramon, CA
11/25/2002 - 3.8 mag, 10.6mi depth 1 mi from San Ramon, CA
4/29/2017 - 3.8 mag, 18.0mi depth 7 mi from Blackhawk, CA
1/14/2021 - 3.8 mag, 6.7mi depth 2 mi from Concord, CA
4/19/2023 - 3.8 mag, 16.4mi depth 2 mi from Antioch, CA
2/28/2024 - 3.8 mag, 11.6mi depth 0 mi from Discovery Bay, CA
1/24/1980 - 3.7 mag, 14.0mi depth 4 mi from Camino Tassajara, CA
4/6/1990 - 3.7 mag, 5.0mi depth 2 mi from Alamo, CA
2/21/1979 - 3.7 mag, 14.0mi depth 7 mi from Camino Tassajara, CA
7/15/2000 - 3.7 mag, 15.3mi depth 2 mi from Concord, CA
3/21/2006 - 3.7 mag, 12.9mi depth 4 mi from Moraga, CA
2/2/2003 - 3.7 mag, 16.6mi depth 1 mi from San Ramon, CA
11/10/2018 - 3.7 mag, 10.1mi depth 1 mi from Crockett, CA
7/10/1979 - 3.7 mag, 17.0mi depth 2 mi from Diablo, CA
7/13/1976 - 3.7 mag, 10.0mi depth 5 mi from Pittsburg, CA
12/30/1987 - 3.7 mag, 7.0mi depth 7 mi from Byron, CA
12/17/2022 - 3.6 mag, 5.8mi depth 0 mi from El Cerrito, CA
5/6/2015 - 3.6 mag, 14.5mi depth 2 mi from Concord, CA
6/30/1986 - 3.6 mag, 11.0mi depth 7 mi from Brentwood, CA
10/14/1990 - 3.6 mag, 9.0mi depth 0 mi from Crockett, CA
11/4/1989 - 3.6 mag, 9.0mi depth 4 mi from Canyon, CA
4/12/1989 - 3.6 mag, 12.0mi depth 7 mi from Byron, CA
2/23/2018 - 3.6 mag, 0.5mi depth 1 mi from Diablo, CA
11/26/2002 - 3.6 mag, 10.6mi depth 0 mi from San Ramon, CA
12/1/1995 - 3.6 mag, 9.9mi depth 1 mi from El Cerrito, CA
1/29/1980 - 3.6 mag, 14.0mi depth 5 mi from Camino Tassajara, CA
2/22/1980 - 3.5 mag, 13.0mi depth 5 mi from Brentwood, CA
4/2/2015 - 3.5 mag, 10.7mi depth 3 mi from San Ramon, CA
7/19/1977 - 3.5 mag, 2.0mi depth 2 mi from Bay Point, CA
7/16/2019 - 3.5 mag, 11.1mi depth 8 mi from Blackhawk, CA
7/12/1991 - 3.5 mag, 11.0mi depth 7 mi from Camino Tassajara, CA
2/2/2003 - 3.5 mag, 16.5mi depth 1 mi from San Ramon, CA
6/17/1975 - 3.5 mag, 26.0mi depth 3 mi from Bay Point, CA
7/2/1987 - 3.5 mag, 7.0mi depth 1 mi from Contra Costa Centre, CA
6/5/1983 - 3.5 mag, 19.0mi depth 0 mi from Pittsburg, CA
2/2/2001 - 3.5 mag, 12.5mi depth 3 mi from Canyon, CA
6/6/2008 - 3.5 mag, 7.9mi depth 3 mi from Moraga, CA
1/25/1980 - 3.5 mag, 9.0mi depth 5 mi from Camino Tassajara, CA
11/25/2002 - 3.5 mag, 11.0mi depth 0 mi from San Ramon, CA
2/16/2012 - 3.5 mag, 8.3mi depth 2 mi from Crockett, CA
6/8/2009 - 3.5 mag, 9.0mi depth 1 mi from Danville, CA
2/16/2012 - 3.5 mag, 8.8mi depth 2 mi from Crockett, CA
1/25/1980 - 3.5 mag, 12.0mi depth 5 mi from Camino Tassajara, CA
4/27/2019 - 3.5 mag, 16.8mi depth 1 mi from Pacheco, CA
10/19/2015 - 3.5 mag, 7.7mi depth 3 mi from San Ramon, CA
8/13/1979 - 3.5 mag, 9.0mi depth 1 mi from Orinda, CA
10/19/2015 - 3.5 mag, 7.2mi depth 3 mi from San Ramon, CA
1/24/1980 - 3.5 mag, 8.0mi depth 6 mi from Camino Tassajara, CA
9/29/2002 - 3.5 mag, 4.1mi depth 1 mi from Byron, CA
4/6/1990 - 3.5 mag, 3.0mi depth 1 mi from Alamo, CA
10/19/2003 - 3.5 mag, 8.5mi depth 2 mi from Lafayette, CA
10/20/2003 - 3.4 mag, 8.9mi depth 2 mi from Orinda, CA
3/5/2012 - 3.4 mag, 8.1mi depth 1 mi from El Cerrito, CA
3/1/2006 - 3.4 mag, 8.5mi depth 3 mi from Orinda, CA
10/15/1976 - 3.4 mag, 19.0mi depth 2 mi from Clyde, CA
10/15/2019 - 3.4 mag, 14.8mi depth 1 mi from Pleasant Hill, CA
8/14/1977 - 3.4 mag, 9.0mi depth 2 mi from San Ramon, CA
5/22/2011 - 3.4 mag, 9.8mi depth 3 mi from El Sobrante, CA
10/10/1990 - 3.4 mag, 13.0mi depth 7 mi from Camino Tassajara, CA
3/27/1997 - 3.4 mag, 21.4mi depth 8 mi from Bay Point, CA
1/27/2018 - 3.4 mag, 10.8mi depth 395 mi from El Cerrito, CA
5/6/2022 - 3.4 mag, 20.1mi depth 224 mi from Bayview, CA
8/15/2023 - 3.4 mag, 9.9mi depth 2 mi from Alamo, CA
4/7/1990 - 3.4 mag, 3.0mi depth 2 mi from Alamo, CA
6/25/1979 - 3.4 mag, 9.0mi depth 6 mi from Brentwood, CA
5/3/1976 - 3.4 mag, 26.0mi depth 8 mi from Bay Point, CA

View All

Earthquake Probability for Contra Costa County, CA

View the probability of a major earthquake within the next 50 years in Contra Costa 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)

5.0

98.42%

5.1

97.47%

5.2

97.47%

5.2

96.25%

5.3

94.80%

5.4

93.18%

5.5

91.45%

5.6

89.69%

5.7

87.94%

5.8

86.27%

5.9

84.70%

6.0

83.26%

6.1

81.78%

6.2

80.23%

6.3

78.60%

6.4

75.77%

6.5

70.29%

6.6

61.89%

6.7

52.50%

6.8

41.53%

6.9

29.72%

7.0

18.02%

7.1

9.71%

7.2

4.49%

7.3

1.47%

7.4

0.38%

7.5

0.09%

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 Contra Costa County, CA

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

List of Earthquake Incidents for Contra Costa County, CA

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

Date

Magnitude

Depth

04/13/2024

0.9

9.5

Earthquake Information for Contra Costa County, California

Earthquake Probability for Contra Costa County, CA

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

Earthquake Count for Contra Costa County, CA

List of Earthquake Incidents for Contra Costa County, CA

Risk Of Natural Disasters In Contra Costa County, CA

Related Pages

California Earthquakes by City