Latest quakes in or near Contra Costa County - list, stats and map
Latest See all | Mag. 2.1 earthquake North Pacific Ocean - California, United States - |
Latest felt | Mag. 2.3 earthquake Napa County - California, United States - |
Strongest past 30 days | Mag. 3.2 23 mi north of Santa Rosa - California, United States - Apr 8, 2024 - |
- 1 quake above magnitude 3
- 11 quakes between magnitude 2 and 3
- 43 quakes below magnitude 2 that people normally don't feel.
Date and Time | Mag Depth | Nearest Volcano | Location | Details | Map |
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Apr 19, 03:08 pm (Los Angeles) | 2.1 10 km | 23 km (14 mi) to the W | 8 km WNW of San Francisco Zoo, CA | Info | |
Apr 19, 02:01 pm (Los Angeles) | 2.3 4.7 km | 59 km (37 mi) to the NW | 7 km E of Angwin, CA 3 reports | Info | |
Apr 19, 12:52 pm (Los Angeles) | 2.0 4.3 km | 41 km (25 mi) to the N | 8 km ENE of Dixon, CA | Info | |
Apr 19, 10:30 am (Los Angeles) | 2.1 3.1 km | 10 km (6.2 mi) to the NW | 5.6 mi east of Vallejo, Solano County, California, United States | Info | |
Apr 18, 08:12 pm (Los Angeles) | 2.0 0 km | 9 km (5.6 mi) to the NW | 5 km SSW of American Canyon, CA | Info | |
Apr 18, 06:05 pm (Los Angeles) | 1.3 18 km | 9 km (5.6 mi) to the SE | 0.6 mi north of Livermore, Alameda County, California, United States | Info | |
Thursday, April 18, 2024 GMT (2 quakes) | |||||
Apr 18, 03:18 pm (Los Angeles) | 2.0 3.3 km | 96 km (60 mi) to the SE | 13 km N of Hollister, CA | Info | |
Apr 18, 09:06 am (Los Angeles) | 1.7 26 km | 21 km (13 mi) to the SE | 14 km SE of Livermore, CA | Info | |
Wednesday, April 17, 2024 GMT (2 quakes) | |||||
Apr 17, 08:58 am (Los Angeles) | 1.3 8.3 km | Contra Costa County, 3.1 mi east of Berkeley, Alameda County, California, United States | Info | ||
Apr 17, 08:34 am (Los Angeles) | 2.5 7.9 km | 47 km (29 mi) to the NW | 8 km WSW of Kenwood, CA 3 reports | Info | |
Tuesday, April 16, 2024 GMT (2 quakes) | |||||
Apr 16, 01:32 am (Los Angeles) | 2.0 0.4 km | 91 km (57 mi) to the SE | 22 km SSW of Gustine, CA | Info |
Contra Costa Quake-O-Meter
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Earthquake statistics
Average number of earthquakes
- Mag. 7 or higher: 0.03 quakes per year (or 1 quake every 31.3 years)
- Mag. 6 or higher: 0.24 quakes per year (or 1 quake every 4.1 years)
- Mag. 5 or higher: 0.41 quakes per year (or 1 quake every 2.4 years)
- Mag. 4 or higher: 1.63 quakes per year
- Mag. 3 or higher: 12.6 quakes per year
- Mag. 2 or higher: 107 quakes per year (or 8.9 quakes per month)
- Mag. 1 or higher: 425 quakes per year (or 35.4 quakes per month)
Number of earthquakes over time
Contra Costa Earthquake FAQ
+How frequent are earthquakes in or near Contra Costa County?
Contra Costa has a very high level of seismic activity. Based on data from the past 54 years and our earthquake archive back to 1900, there are about 458 quakes on average per year in or near Contra Costa County. 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.
+How many earthquakes occur every year in or near Contra Costa County?
On average, Contra Costa has about 107 quakes of magnitude 2 or higher per year (Mag 3+: 12.6 quakes per year).
+When was the latest earthquake in or near Contra Costa County?
The last earthquake in or near Contra Costa County occurred 7 hours ago and had a magnitude of 2.1:
A light magnitude 2.1 earthquake occurred in the North Pacific Ocean near the coast of California, United States, in the early afternoon of Friday, Apr 19, 2024 at 3.08 pm local time (America/Los Angeles GMT -7). The quake had a very shallow depth of 10 km (6 mi) and was not felt (or at least not reported so).
+How many quakes were there in or near Contra Costa County in the past 30 days?
In the past 30 days, Contra Costa County has had 1 quake of magnitude 3.2 and 11 quakes between 2.0 and 3.0. There have been also 43 quakes below magnitude 2.0 which people don't normally feel.
+What was the strongest quake in or near Contra Costa County in the past 30 days?
The strongest earthquake in or near Contra Costa County in the past 30 days had a magnitude of 3.2 and occurred 12 days ago:
A light magnitude 3.2 earthquake hit 37 km (23 mi) away from Santa Rosa, California, United States, in the morning of Monday, Apr 8, 2024 at 8.45 am local time (America/Los Angeles GMT -7). The quake had a very shallow depth of 2.6 km (1.6 mi) and was reported felt by some people near the epicenter.
Embed or share standalone map
You can use the standalone version of our interactive earthquake map or embed it on your website:Largest Quakes in or near Contra Costa County
Date and Time | Mag Depth | ###DIST_LABEL### | Location | Details | Map |
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