Latest quakes in or near Contra Costa County - list, stats and map
Latest See all | Mag. 1.6 earthquake North Pacific Ocean - California, United States - |
Latest felt | Mag. 2.5 earthquake Napa County - California, United States - |
Strongest past 30 days | Mag. 3.2 2 km ESE of The Geysers - CA - Apr 8, 2024 - |
- 1 quake above magnitude 3
- 6 quakes between magnitude 2 and 3
- 45 quakes below magnitude 2 that people normally don't feel.
Date and Time | Mag Depth | Nearest Volcano | Location | Details | Map |
---|---|---|---|---|---|
May 2, 09:23 pm (Los Angeles) | 1.6 9.3 km | 24 km (15 mi) to the SW | North Pacific Ocean, 4.2 mi north of San Mateo, San Mateo County, California, United States | Info | |
May 2, 09:13 pm (Los Angeles) | 2.5 3.2 km | 64 km (40 mi) to the NW | 6 km NNE of Angwin, CA 2 reports | Info | |
Thursday, May 2, 2024 GMT (3 quakes) | |||||
May 2, 12:12 pm (Los Angeles) | 2.5 1.6 km | 100 km (62 mi) to the NW | 8 km WNW of Cobb, CA 1 report | Info | |
May 2, 09:50 am (Los Angeles) | 1.3 7.9 km | 3.8 mi west of Concord, Contra Costa County, California, United States | Info | ||
May 1, 09:30 pm (Los Angeles) | 1.2 6.7 km | 8 km (5 mi) to the SW | 0.3 mi northwest of Alameda, Alameda County, California, United States | Info | |
Wednesday, May 1, 2024 GMT (2 quakes) | |||||
May 1, 11:37 am (Los Angeles) | 1.6 1.5 km | 3 km (1.9 mi) to the W | 7 km E of Santa Venetia, CA | Info | |
Apr 30, 09:57 pm (Los Angeles) | 2.1 3.3 km | 33 km (21 mi) to the NE | 7.3 mi north of Lodi, San Joaquin County, California, United States 2 reports | Info | |
Tuesday, April 30, 2024 GMT (2 quakes) | |||||
Apr 30, 08:25 am (Los Angeles) | 1.6 4.1 km | 24 km (15 mi) to the W | North Pacific Ocean, 6.3 mi northwest of Daly City, San Mateo County, California, United States | Info | |
Apr 29, 05:10 pm (Los Angeles) | 2.1 3.1 km | 55 km (34 mi) to the S | 13 mi east of San Jose, Santa Clara County, California, United States 1 report | Info | |
Monday, April 29, 2024 GMT (1 quake) | |||||
Apr 28, 05:46 pm (Los Angeles) | 2.1 0.5 km | 93 km (58 mi) to the NW | 2 km NNE of The Geysers, CA | Info | |
Sunday, April 28, 2024 GMT (4 quakes) | |||||
Apr 28, 02:36 pm (Los Angeles) | 2.2 3.5 km | 95 km (59 mi) to the NW | 5 km WNW of The Geysers, CA | Info |
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Earthquake statistics
Average number of earthquakes
- Mag. 6 or higher: 0.05 quakes per year (or 1 quake every 20.8 years)
- Mag. 5 or higher: 0.22 quakes per year (or 1 quake every 4.6 years)
- Mag. 4 or higher: 1.44 quakes per year
- Mag. 3 or higher: 12.4 quakes per year
- Mag. 2 or higher: 106 quakes per year (or 8.8 quakes per month)
- Mag. 1 or higher: 446 quakes per year (or 37.2 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 high level of seismic activity. Based on data from the past 54 years and our earthquake archive back to 1900, there are about 489 quakes on average per year in or near Contra Costa County. Contra Costa has had at least 6 quakes above magnitude 6 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 20 to 25 years.
+How many earthquakes occur every year in or near Contra Costa County?
On average, Contra Costa has about 106 quakes of magnitude 2 or higher per year (Mag 3+: 12.4 quakes per year).
+When was the latest earthquake in or near Contra Costa County?
The last earthquake in or near Contra Costa County occurred 15 hours ago and had a magnitude of 1.6:
A light magnitude 1.6 earthquake occurred in the North Pacific Ocean near the coast of California, United States, in the evening of Thursday, May 2, 2024 at 9.23 pm local time (America/Los Angeles GMT -7). The quake had a very shallow depth of 9.3 km (5.8 mi) and was too small to be felt by people.
+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 6 quakes between 2.0 and 3.0. There have been also 45 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 4 weeks 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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