Latest quakes in or near Contra Costa County - list, stats and map
Latest See all | Mag. 2.1 earthquake Sonoma County - California, United States - |
Latest felt | Mag. 2.9 earthquake 13 mi east of San Jose - 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
- 8 quakes between magnitude 2 and 3
- 39 quakes below magnitude 2 that people normally don't feel.
Date and Time | Mag Depth | Nearest Volcano | Location | Details | Map |
---|---|---|---|---|---|
Apr 24, 11:28 am (Los Angeles) | 2.1 1.9 km | 99 km (62 mi) to the NW | Sonoma County, 13 mi southwest of Clearlake, Lake County, California, United States | Info | |
Apr 24, 04:41 am (Los Angeles) | 2.9 3.7 km | 55 km (34 mi) to the S | 16 km E of Seven Trees, CA I FELT IT - 3 reports | Info | |
Apr 24, 04:36 am (Los Angeles) | 1.2 3.9 km | 32 km (20 mi) to the S | 7.5 mi east of Milpitas, Santa Clara County, California, United States | Info | |
Tuesday, April 23, 2024 GMT (1 quake) | |||||
Apr 23, 12:31 pm (Los Angeles) | 1.0 7.2 km | 31 km (19 mi) to the SW | 1.9 mi north of Pacifica, San Mateo County, California, United States | Info | |
Monday, April 22, 2024 GMT (3 quakes) | |||||
Apr 22, 05:30 am (Los Angeles) | 1.6 7.7 km | 25 km (16 mi) to the SW | 4 km WSW of San Francisco Zoo, CA | Info | |
Apr 21, 09:39 pm (Los Angeles) | 2.0 2.4 km | 98 km (61 mi) to the NW | 7 km NW of The Geysers, CA 1 report | Info | |
Apr 21, 09:30 pm (Los Angeles) | 3.0 2.4 km | 98 km (61 mi) to the NW | 7 km NW of The Geysers, CA I FELT IT - 2 reports | Info | |
Sunday, April 21, 2024 GMT (2 quakes) | |||||
Apr 21, 12:39 pm (Los Angeles) | 2.6 2.9 km | 93 km (58 mi) to the NW | 2 km NNW of The Geysers, CA I FELT IT - 1 report | Info | |
Apr 20, 08:59 pm (Los Angeles) | 0.6 8.9 km | 3.6 mi northwest of San Ramon, Contra Costa County, California, United States | Info | ||
Saturday, April 20, 2024 GMT (1 quake) | |||||
Apr 19, 10:15 pm (Los Angeles) | 1.1 10 km | Contra Costa County, 5.2 mi south of Vallejo, Solano County, California, United States | Info | ||
Friday, April 19, 2024 GMT (5 quakes) | |||||
Apr 19, 03:08 pm (Los Angeles) | 2.1 10 km | 23 km (14 mi) to the W | North Pacific Ocean, 7.9 mi northwest of Daly City, San Mateo County, California, United States | 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 2.1:
A light magnitude 2.1 earthquake hit 21 km (13 mi) away from Clearlake, California, United States, in the morning of Wednesday, Apr 24, 2024 at 11.28 am local time (America/Los Angeles GMT -7). The quake had a very shallow depth of 1.9 km (1.2 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 8 quakes between 2.0 and 3.0. There have been also 39 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 2 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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