Earthquake Information for San Mateo County, California

San Mateo County, CA has a very high earthquake risk, with a total of 90 earthquakes since 1931. The USGS database shows that there is a 98.54% chance of a major earthquake within 50km of San Mateo County, CA within the next 50 years. The largest earthquake within 30 miles of San Mateo County, CA was a 4.8 Magnitude in 1989.

Risk Level:
Very High

Total Number of Earthquakes in San Mateo County since 1931

Probability of A 5.0 Earthquake within next 50 years

98.54%

Most Recent
Largest

4/17/2024 - 1.3 mag, 3.3mi depth 4 mi from Portola Valley, CA
4/8/2024 - 1.1 mag, 10.3mi depth 2 mi from Portola Valley, CA
3/18/2024 - 1.6 mag, 2.7mi depth 3 mi from Pacifica, CA
2/16/2024 - 0.6 mag, 2.7mi depth 3 mi from Portola Valley, CA
2/11/2024 - 1.1 mag, 8.9mi depth 3 mi from Portola Valley, CA
2/1/2024 - 2.3 mag, 3.1mi depth 2 mi from Woodside, CA
2/1/2024 - 2.2 mag, 6.0mi depth 2 mi from Woodside, CA
2/1/2024 - 1.4 mag, 10.3mi depth 3 mi from Portola Valley, CA
2/1/2024 - 2.3 mag, 1.9mi depth 2 mi from Portola Valley, CA
1/27/2024 - 1.5 mag, 2.2mi depth 2 mi from Portola Valley, CA
1/24/2024 - 1.2 mag, 8.5mi depth 1 mi from Pacifica, CA
1/20/2024 - 1.5 mag, 6.0mi depth 2 mi from Woodside, CA
1/6/2024 - 2.2 mag, 10.0mi depth 2 mi from Portola Valley, CA
1/4/2024 - 1.7 mag, 7.5mi depth 3 mi from Colma, CA
12/27/2023 - 1.0 mag, 3.1mi depth 3 mi from Pacifica, CA
12/26/2023 - 1.6 mag, 6.5mi depth 1 mi from Pacifica, CA
12/7/2023 - 1.5 mag, 7.8mi depth 3 mi from Colma, CA
12/7/2023 - 1.3 mag, 6.8mi depth 0 mi from Brisbane, CA
12/6/2023 - 1.9 mag, 11.9mi depth 1 mi from Millbrae, CA
11/20/2023 - 1.6 mag, 8.4mi depth 1 mi from Pacifica, CA
11/20/2023 - 1.3 mag, 10.7mi depth 2 mi from Millbrae, CA
11/19/2023 - 1.6 mag, 10.0mi depth 3 mi from Hillsborough, CA
11/19/2023 - 1.5 mag, 2.5mi depth 3 mi from Hillsborough, CA
11/17/2023 - 1.7 mag, 11.5mi depth 4 mi from Hillsborough, CA
11/15/2023 - 1.4 mag, 9.4mi depth 3 mi from Hillsborough, CA
11/13/2023 - 1.8 mag, 7.7mi depth 1 mi from Pacifica, CA
11/13/2023 - 1.2 mag, 10.4mi depth 2 mi from San Bruno, CA
11/12/2023 - 1.5 mag, 10.3mi depth 3 mi from Millbrae, CA
11/1/2023 - 1.9 mag, 10.7mi depth 2 mi from Millbrae, CA
10/29/2023 - 1.2 mag, 10.8mi depth 3 mi from Millbrae, CA
10/28/2023 - 1.6 mag, 11.5mi depth 2 mi from Millbrae, CA
10/27/2023 - 2.2 mag, 12.3mi depth 2 mi from Millbrae, CA
10/27/2023 - 1.7 mag, 12.1mi depth 2 mi from Millbrae, CA
10/27/2023 - 3.9 mag, 13.1mi depth 2 mi from Millbrae, CA
10/27/2023 - 1.8 mag, 11.9mi depth 2 mi from Millbrae, CA
10/18/2023 - 1.8 mag, 11.4mi depth 2 mi from Millbrae, CA
10/17/2023 - 1.3 mag, 11.6mi depth 2 mi from Millbrae, CA
9/25/2023 - 2.2 mag, 8.5mi depth 5 mi from Foster City, CA
9/23/2023 - 1.9 mag, 10.6mi depth 1 mi from South San Francisco, CA
9/17/2023 - 2.3 mag, 8.7mi depth 1 mi from Pacifica, CA
9/17/2023 - 1.9 mag, 9.0mi depth 0 mi from Pacifica, CA
9/9/2023 - 2.4 mag, 9.0mi depth 3 mi from Half Moon Bay, CA
9/7/2023 - 1.5 mag, 12.3mi depth 2 mi from Pacifica, CA
8/27/2023 - 1.4 mag, 0.2mi depth 9 mi from Half Moon Bay, CA
8/25/2023 - 1.0 mag, 3.4mi depth 1 mi from Portola Valley, CA
8/22/2023 - 1.4 mag, 9.7mi depth 1 mi from Pacifica, CA
8/20/2023 - 1.5 mag, 9.4mi depth 3 mi from Portola Valley, CA
8/17/2023 - 1.0 mag, 11.8mi depth 2 mi from Burlingame, CA
8/17/2023 - 1.0 mag, 8.2mi depth 3 mi from Portola Valley, CA
8/15/2023 - 2.2 mag, 10.1mi depth 1 mi from Pacifica, CA
8/8/2023 - 1.5 mag, 8.5mi depth 3 mi from Portola Valley, CA
7/18/2023 - 1.7 mag, 7.3mi depth 1 mi from Pacifica, CA
7/16/2023 - 1.9 mag, 8.1mi depth 2 mi from Half Moon Bay, CA
7/6/2023 - 0.5 mag, 7.1mi depth 1 mi from Pacifica, CA
6/26/2023 - 2.0 mag, 7.1mi depth 0 mi from Portola Valley, CA
6/26/2023 - 2.0 mag, 8.4mi depth 3 mi from Portola Valley, CA
6/26/2023 - 1.2 mag, 4.8mi depth 1 mi from Portola Valley, CA
6/23/2023 - 2.0 mag, 8.6mi depth 3 mi from Portola Valley, CA
6/21/2023 - 2.1 mag, 8.2mi depth 3 mi from Portola Valley, CA
6/19/2023 - 2.5 mag, 7.9mi depth 1 mi from Pacifica, CA
6/18/2023 - 2.2 mag, 10.8mi depth 4 mi from Hillsborough, CA
6/11/2023 - 1.2 mag, 7.8mi depth 1 mi from Pacifica, CA
5/14/2023 - 1.3 mag, 8.5mi depth 1 mi from Pacifica, CA
5/10/2023 - 0.8 mag, 8.4mi depth 1 mi from Pacifica, CA
5/3/2023 - 1.1 mag, 7.3mi depth 1 mi from Pacifica, CA
5/3/2023 - 1.7 mag, 8.0mi depth 1 mi from Pacifica, CA
5/3/2023 - 1.5 mag, 8.0mi depth 1 mi from Pacifica, CA
5/2/2023 - 0.7 mag, 7.1mi depth 1 mi from Pacifica, CA
4/23/2023 - 2.4 mag, 5.0mi depth 4 mi from Colma, CA
4/23/2023 - 1.6 mag, 4.8mi depth 3 mi from Colma, CA
4/23/2023 - 1.8 mag, 5.3mi depth 3 mi from Colma, CA
4/17/2023 - 1.2 mag, 8.4mi depth 1 mi from Pacifica, CA
4/7/2023 - 1.5 mag, 9.0mi depth 1 mi from Pacifica, CA
4/6/2023 - 1.2 mag, 8.0mi depth 1 mi from Pacifica, CA
3/29/2023 - 1.2 mag, 9.7mi depth 1 mi from Pacifica, CA
3/29/2023 - 2.2 mag, 7.0mi depth 2 mi from San Bruno, CA
3/29/2023 - 1.5 mag, 7.1mi depth 2 mi from San Bruno, CA
3/28/2023 - 1.2 mag, 7.8mi depth 1 mi from Pacifica, CA
3/28/2023 - 2.0 mag, 8.5mi depth 1 mi from Pacifica, CA
3/28/2023 - 1.1 mag, 7.4mi depth 1 mi from Pacifica, CA
3/28/2023 - 2.3 mag, 9.1mi depth 1 mi from Pacifica, CA
3/28/2023 - 2.6 mag, 8.9mi depth 1 mi from Pacifica, CA
3/28/2023 - 2.6 mag, 9.2mi depth 1 mi from Pacifica, CA
3/28/2023 - 3.5 mag, 9.5mi depth 1 mi from Pacifica, CA
3/8/2023 - 1.4 mag, 6.6mi depth 2 mi from Portola Valley, CA
3/7/2023 - 1.5 mag, 6.6mi depth 1 mi from Portola Valley, CA
3/3/2023 - 1.3 mag, 12.3mi depth 3 mi from Daly City, CA
2/27/2023 - 1.6 mag, 0.2mi depth 1 mi from San Mateo, CA
2/12/2023 - 1.5 mag, 11.2mi depth 3 mi from Daly City, CA
2/3/2023 - 2.3 mag, 5.2mi depth 3 mi from Colma, CA
2/3/2023 - 2.1 mag, 4.8mi depth 3 mi from Colma, CA
1/31/2023 - 1.3 mag, 8.9mi depth 3 mi from Portola Valley, CA
1/31/2023 - 1.9 mag, 9.1mi depth 3 mi from Portola Valley, CA
1/30/2023 - 1.5 mag, 10.3mi depth 1 mi from Brisbane, CA
1/22/2023 - 1.3 mag, 6.7mi depth 0 mi from Portola Valley, CA
1/22/2023 - 1.4 mag, 7.0mi depth 0 mi from Portola Valley, CA
1/22/2023 - 1.3 mag, 6.0mi depth 0 mi from Portola Valley, CA
1/22/2023 - 2.1 mag, 7.1mi depth 0 mi from Portola Valley, CA
1/22/2023 - 2.4 mag, 6.8mi depth 1 mi from Portola Valley, CA
1/22/2023 - 1.8 mag, 7.6mi depth 1 mi from Pacifica, CA

4/28/1979 - 4.4 mag, 12.0mi depth 2 mi from Pacifica, CA
11/9/2011 - 4.0 mag, 10.0mi depth 280 mi from Pescadero, CA
10/27/2023 - 3.9 mag, 13.1mi depth 2 mi from Millbrae, CA
12/12/1981 - 3.8 mag, 9.0mi depth 3 mi from Woodside, CA
3/3/1989 - 3.8 mag, 10.0mi depth 373 mi from Pescadero, CA
11/14/1988 - 3.7 mag, 11.0mi depth 3 mi from Portola Valley, CA
1/21/1979 - 3.7 mag, 33.0mi depth 611 mi from Pescadero, CA
3/11/1997 - 3.6 mag, 4.8mi depth 5 mi from Broadmoor, CA
10/5/2019 - 3.6 mag, 7.6mi depth 4 mi from Colma, CA
3/11/1997 - 3.6 mag, 5.3mi depth 5 mi from Broadmoor, CA
12/24/2002 - 3.6 mag, 9.4mi depth 0 mi from Pacifica, CA
9/26/1990 - 3.6 mag, 8.0mi depth 2 mi from Ladera, CA
2/1/1987 - 3.5 mag, 9.0mi depth 2 mi from Broadmoor, CA
6/19/1975 - 3.5 mag, 11.0mi depth 4 mi from La Honda, CA
7/14/1997 - 3.5 mag, 15.1mi depth 5 mi from Pescadero, CA
11/14/1988 - 3.5 mag, 11.0mi depth 3 mi from Portola Valley, CA
6/22/1975 - 3.5 mag, 12.0mi depth 4 mi from La Honda, CA
3/28/2023 - 3.5 mag, 9.5mi depth 1 mi from Pacifica, CA
7/1/1996 - 3.4 mag, 10.9mi depth 4 mi from Broadmoor, CA
4/21/1983 - 3.4 mag, 8.0mi depth 7 mi from La Honda, CA
2/25/2011 - 3.4 mag, 5.3mi depth 19 mi from Pescadero, CA
4/18/2011 - 3.4 mag, 12.5mi depth 2 mi from Pacifica, CA
5/14/1986 - 3.4 mag, 14.0mi depth 2 mi from Portola Valley, CA
3/12/1974 - 3.3 mag, 11.0mi depth 2 mi from Loma Mar, CA
10/19/1989 - 3.3 mag, 15.0mi depth 30 mi from Pescadero, CA
6/20/1975 - 3.3 mag, 11.0mi depth 4 mi from La Honda, CA
11/6/1989 - 3.3 mag, 9.0mi depth 3 mi from Pacifica, CA
6/20/1975 - 3.3 mag, 14.0mi depth 5 mi from La Honda, CA
11/1/1977 - 3.3 mag, 2.0mi depth 4 mi from Broadmoor, CA
11/16/1988 - 3.2 mag, 11.0mi depth 3 mi from Portola Valley, CA
3/20/2002 - 3.2 mag, 7.8mi depth 1 mi from Pacifica, CA
5/2/1997 - 3.2 mag, 5.0mi depth 2 mi from Broadmoor, CA
6/28/2010 - 3.2 mag, 7.7mi depth 5 mi from Broadmoor, CA
9/6/2001 - 3.1 mag, 8.9mi depth 2 mi from Pacifica, CA
2/6/2015 - 3.1 mag, 4.5mi depth 1 mi from Emerald Lake Hills, CA
10/27/1997 - 3.1 mag, 9.9mi depth 4 mi from Broadmoor, CA
3/9/1986 - 3.1 mag, 7.0mi depth 2 mi from Broadmoor, CA
2/7/2008 - 3.1 mag, 9.6mi depth 2 mi from Pacifica, CA
11/14/1988 - 3.1 mag, 11.0mi depth 3 mi from Portola Valley, CA
7/23/2010 - 3.1 mag, 7.7mi depth 2 mi from Broadmoor, CA
11/2/1986 - 3.0 mag, 9.0mi depth 2 mi from Pacifica, CA
5/9/1989 - 3.0 mag, 7.0mi depth 2 mi from Ladera, CA
2/1/1987 - 3.0 mag, 9.0mi depth 3 mi from Broadmoor, CA
8/14/1997 - 3.0 mag, 1.6mi depth 5 mi from Broadmoor, CA
3/14/1998 - 3.0 mag, 9.6mi depth 2 mi from Portola Valley, CA
7/27/1991 - 2.9 mag, 11.0mi depth 5 mi from Pescadero, CA
7/21/1986 - 2.9 mag, 5.0mi depth 2 mi from Portola Valley, CA
1/19/2023 - 2.9 mag, 6.8mi depth 0 mi from Portola Valley, CA
11/25/1991 - 2.9 mag, 12.0mi depth 3 mi from Broadmoor, CA
11/15/2022 - 2.9 mag, 10.7mi depth 2 mi from Half Moon Bay, CA
8/21/1985 - 2.9 mag, 10.0mi depth 15 mi from Pescadero, CA
1/20/2023 - 2.9 mag, 6.6mi depth 1 mi from Portola Valley, CA
5/10/1986 - 2.9 mag, 8.0mi depth 0 mi from Portola Valley, CA
8/30/2011 - 2.8 mag, 6.5mi depth 3 mi from Broadmoor, CA
6/22/2020 - 2.8 mag, 9.4mi depth 3 mi from Portola Valley, CA
7/12/1989 - 2.8 mag, 11.0mi depth 5 mi from Broadmoor, CA
12/29/2012 - 2.8 mag, 8.7mi depth 2 mi from Montara, CA
7/23/2015 - 2.8 mag, 12.9mi depth 184 mi from Portola Valley, CA
2/17/2003 - 2.8 mag, 8.1mi depth 0 mi from Pacifica, CA
11/28/2016 - 2.8 mag, 8.1mi depth 2 mi from Pacifica, CA
1/30/2019 - 2.8 mag, 12.5mi depth 3 mi from Daly City, CA
8/5/1992 - 2.8 mag, 9.0mi depth 3 mi from Pescadero, CA
8/3/2013 - 2.8 mag, 3.9mi depth 1 mi from Millbrae, CA
5/14/1990 - 2.8 mag, 8.0mi depth 2 mi from Pacifica, CA
11/12/2013 - 2.8 mag, 10.6mi depth 3 mi from Broadmoor, CA
2/9/2008 - 2.8 mag, 14.2mi depth 8 mi from Pescadero, CA
7/4/2012 - 2.8 mag, 9.0mi depth 1 mi from Montara, CA
3/25/1996 - 2.7 mag, 7.4mi depth 2 mi from Millbrae, CA
1/26/2002 - 2.7 mag, 7.4mi depth 3 mi from Broadmoor, CA
1/27/2002 - 2.7 mag, 8.3mi depth 1 mi from Pacifica, CA
1/30/2015 - 2.7 mag, 8.0mi depth 6 mi from Daly City, CA
6/11/2002 - 2.7 mag, 8.5mi depth 1 mi from Pacifica, CA
1/22/1985 - 2.7 mag, 8.0mi depth 2 mi from Broadmoor, CA
1/13/2015 - 2.7 mag, 1.0mi depth 185 mi from Portola Valley, CA
4/24/2014 - 2.7 mag, 5.2mi depth 1 mi from Ladera, CA
7/4/2012 - 2.7 mag, 9.0mi depth 2 mi from Montara, CA
3/8/2013 - 2.7 mag, 6.9mi depth 6 mi from Broadmoor, CA
6/20/2013 - 2.7 mag, 8.1mi depth 1 mi from Pacifica, CA
3/25/1995 - 2.7 mag, 10.3mi depth 9 mi from Pescadero, CA
11/15/1988 - 2.6 mag, 11.0mi depth 2 mi from Portola Valley, CA
1/19/2023 - 2.6 mag, 13.6mi depth 2 mi from Woodside, CA
10/22/1986 - 2.6 mag, 12.0mi depth 4 mi from Pescadero, CA
10/7/2022 - 2.6 mag, 5.3mi depth 3 mi from Colma, CA
5/24/1984 - 2.6 mag, 7.3mi depth 1 mi from Redwood City, CA
1/17/1992 - 2.6 mag, 10.0mi depth 7 mi from Broadmoor, CA
12/25/1986 - 2.6 mag, 9.0mi depth 6 mi from Broadmoor, CA
7/4/2012 - 2.6 mag, 8.4mi depth 2 mi from Montara, CA
10/21/2005 - 2.6 mag, 7.4mi depth 3 mi from Pacifica, CA
3/28/2023 - 2.6 mag, 8.9mi depth 1 mi from Pacifica, CA
3/28/2023 - 2.6 mag, 9.2mi depth 1 mi from Pacifica, CA
8/27/1991 - 2.5 mag, 12.0mi depth 4 mi from Pescadero, CA
3/15/2019 - 2.5 mag, 9.2mi depth 3 mi from Colma, CA
7/2/2012 - 2.5 mag, 14.6mi depth 2 mi from Pacifica, CA
1/28/2011 - 2.5 mag, 11.6mi depth 2 mi from Pacifica, CA
4/14/2010 - 2.5 mag, 8.1mi depth 9 mi from Pescadero, CA
7/24/1985 - 2.5 mag, 8.0mi depth 3 mi from Broadmoor, CA
7/1/2014 - 2.5 mag, 5.7mi depth 3 mi from Portola Valley, CA
2/6/2015 - 2.5 mag, 4.4mi depth 1 mi from Emerald Lake Hills, CA
3/25/1988 - 2.5 mag, 11.0mi depth 2 mi from Colma, CA
3/20/2013 - 2.5 mag, 7.4mi depth 7 mi from Broadmoor, CA

View All

Earthquake Probability for San Mateo County, CA

View the probability of a major earthquake within the next 50 years in San Mateo 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

98.54%

5.1

97.77%

5.2

97.77%

5.2

96.83%

5.3

95.76%

5.4

94.59%

5.5

93.38%

5.6

92.17%

5.7

90.99%

5.8

89.88%

5.9

88.85%

6.0

87.59%

6.1

85.79%

6.2

82.88%

6.3

78.96%

6.4

73.72%

6.5

68.36%

6.6

63.04%

6.7

57.65%

6.8

51.83%

6.9

46.05%

7.0

40.49%

7.1

35.78%

7.2

32.31%

7.3

29.02%

7.4

25.47%

7.5

20.93%

7.6

17.43%

7.7

14.08%

7.8

10.66%

7.9

7.03%

8.0

3.86%

8.1

2.43%

8.2

0.66%

8.3

0.32%

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 San Mateo County, CA

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

List of Earthquake Incidents for San Mateo County, CA

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

Date

Magnitude

Depth

04/17/2024

1.3

3.3

Earthquake Information for San Mateo County, California

Earthquake Probability for San Mateo County, CA

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

Earthquake Count for San Mateo County, CA

List of Earthquake Incidents for San Mateo County, CA

Risk Of Natural Disasters In San Mateo County, CA

Related Pages

California Earthquakes by City