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3 quakes Mag. 2+
Number of quakes vs long-term average, past 7 days
Earthquake activity above average

Latest quakes in or near Contra Costa County - list, stats and map

Overview

Latest quake
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Mag. 1.0 earthquake United States, Santa Clara County, California -
Strongest past 30 daysMag. 3.5 United States, Contra Costa County, California - Feb 28, 2024 -
Updated: Mar 28, 2024 19:30 GMT -
Find all latest earthquakes in or near Contra Costa County in our list below, updated every minute! Events are often reported within minutes. If you just felt a quake in or near Contra Costa County, find out which quakes are happening right now!
There were no significant confirmed earthquakes in or near Contra Costa County in the past 24 hours.
In the past 30 days, Contra Costa County has had 47 quakes of magnitudes up to 3.5:
  • 1 quake above magnitude 3
  • 9 quakes between magnitude 2 and 3
  • 37 quakes below magnitude 2 that people normally don't feel.
Latest today: Mag. 1.0 Earthquake United States, 14 mi NE of San Jose, Santa Clara County, California -
Strongest: Mag. 3.5 Earthquake United States, 4.7 mi SE of Brentwood, Contra Costa County, California -
Number of quakes per year
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Map and earthquake list

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Showing all recent or significant quakes in the past 30 days, magnitude 0 or higher, within up to 50 km (31 mi) distance (54 quakes):
Latest quakes in or near Contra Costa County - list, stats and map
Date and TimeMag
Depth
Nearest VolcanoLocationDetailsMap
Mar 27, 10:25 pm (Los Angeles)
Mar 28, 05:25 GMT
1.0

6.4 km
38 km (24 mi) to the SE United States, 14 mi northeast of San Jose, Santa Clara County, California Info
Wednesday, March 27, 2024 GMT (1 quake)
Mar 27, 11:32 am (Los Angeles)
Mar 27, 18:32 GMT
1.5

1.2 km
3 km (1.9 mi) to the W 7 km E of Santa Venetia, CA Info
Monday, March 25, 2024 GMT (3 quakes)
Mar 25, 03:57 pm (Los Angeles)
Mar 25, 22:57 GMT
2.0

2.8 km
46 km (29 mi) to the S United States, 9.9 mi east of San Jose, Santa Clara County, California Info
Mar 25, 05:17 am (Los Angeles)
Mar 25, 12:17 GMT
1.8

15 km
Contra Costa County, United States, 10 mi north of Livermore, Alameda County, California Info
Mar 25, 02:16 am (Los Angeles)
Mar 25, 09:16 GMT
1.4

5.8 km
10 km (6.2 mi) to the S United States, 0.8 mi east of Hayward, Alameda County, California Info
Saturday, March 23, 2024 GMT (4 quakes)
Mar 23, 03:24 pm (Los Angeles)
Mar 23, 22:24 GMT
2.1

14 km
12 km (7.5 mi) to the N Solano County, United States, 8.2 mi north of Pittsburg, Contra Costa County, California Info
Mar 23, 06:41 am (Los Angeles)
Mar 23, 13:41 GMT
1.1

2.4 km
29 km (18 mi) to the SE United States, 8.4 mi southeast of Livermore, Alameda County, California Info
Mar 22, 09:13 pm (Los Angeles)
Mar 23, 04:13 GMT
1.8

8 km
25 km (16 mi) to the SW North Pacific Ocean, United States, 4.6 mi west of Daly City, San Mateo County, California Info
Mar 22, 07:43 pm (Los Angeles)
Mar 23, 02:43 GMT
1.2

12 km
3 km (1.9 mi) to the S United States, 0.2 mi southeast of Dublin, Alameda County, California Info
Friday, March 22, 2024 GMT (5 quakes)
Mar 22, 09:36 am (Los Angeles)
Mar 22, 16:36 GMT
2.6

11 km
3 km SE of Pleasant Hill, CA 5 reportsInfo
Mar 22, 01:53 am (Los Angeles)
Mar 22, 08:53 GMT
1.0

8.4 km
2 km NW of Alamo, CA Info
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About these data
Estimated combined seismic energy released: 1.5 x 1010 joules (4.13 megawatt hours, equivalent to 3.56 tons of TNT) | about seismic energy

Contra Costa Quake-O-Meter

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Number of quakes vs average
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Earthquake statistics

Average number of earthquakes

Based on data from the past 54 years and our earthquake archive back to 1900, there are about 457 quakes on average per year in or near Contra Costa County:
  • Mag. 7 or higher: 0.03 quakes per year (or 1 quake every 31.3 years)
  • Mag. 6 or higher: 0.22 quakes per year (or 1 quake every 4.5 years)
  • Mag. 5 or higher: 0.39 quakes per year (or 1 quake every 2.6 years)
  • Mag. 4 or higher: 1.61 quakes per year
  • Mag. 3 or higher: 12.5 quakes per year
  • Mag. 2 or higher: 107 quakes per year (or 8.9 quakes per month)
  • Mag. 1 or higher: 423 quakes per year (or 35.2 quakes per month)
Contra Costa has a very high level of seismic activity. Contra Costa has had at least 4 quakes above magnitude 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 30 to 35 years.

Number of earthquakes over time

Past 90 days
30 days
7 days
24 hours
2023
2024 so far
Number of earthquakes over time: Past 90 days
Number of earthquakes over time: 30 days
Number of earthquakes over time: 7 days
Number of earthquakes over time: 24 hours
Number of earthquakes over time: 2023
Number of earthquakes over time: 2024 so far
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