Mag. 2.1 earthquake - Sonoma County, 5 mi west of Cobb, California, USA, on Monday, 21 September 2020 at 03:49 (GMT) -
Quake Data | Interactive map | User Reports | Earlier quakes in same area | Quakes in the US | California | Washington, D.C.
Minor magnitude 2.1 earthquake at 2 km depth
21 Sep 03:52 UTC: First to report: USGS after 2 minutes.
Magnitude: 2.1
Depth: 2.3 km
Epicenter latitude / longitude: 38.8145°N / 122.81567°W
(Sonoma County, California, United States)Nearest volcano: Clear Lake (18 km / 11 mi)
Nearby towns and cities:
8 km (5 mi) W of Cobb (pop: 1,780) --> See nearby quakes!
17 km (11 mi) E of Cloverdale (Sonoma County) (pop: 8,810) --> See nearby quakes!
18 km (11 mi) S of Kelseyville (pop: 3,350) --> See nearby quakes!
22 km (14 mi) W of Hidden Valley Lake (pop: 5,580) --> See nearby quakes!
23 km (14 mi) SW of Clearlake (Lake County) (pop: 15,200) --> See nearby quakes!
23 km (14 mi) N of Healdsburg (Sonoma County) (pop: 11,700) --> See nearby quakes!
30 km (18 mi) N of Windsor (Sonoma County) (pop: 27,500) --> See nearby quakes!
43 km (26 mi) NNW of Santa Rosa (pop: 175,000) --> See nearby quakes!
3922 km (2437 mi) WNW of Washington (District of Columbia) (pop: 601,700) --> See nearby quakes!
3922 km (2437 mi) WNW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky
20.4°C (69 F), humidity: 52%, wind: 1 km/h (1 kts) from ENE
Primary data source: USGS (United States Geological Survey)
Clear Sky
20.4°C (69 F), humidity: 52%, wind: 1 km/h (1 kts) from ENEEstimated released energy: 8.9 x 107 joules (24.8 kilowatt hours) More info
Data for the same earthquake reported by different agencies
Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
| Magnitude | Depth | Location | Source |
| M 2.1 | 2.3 km | 7km NW of The Geysers, CA, USA | USGS |
| M 2.1 | 2 km | Northern California, USA | EMSC |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
At magnitude 2.1, this quake was probably too small to be felt by humans, but it could be recorded instrumentally.
There are no user reports for this quake yet. If you felt it be the first to report it!
Earlier earthquakes in the same area
Mag. 2.1 earthquake - Sonoma County, 5 mi west of Cobb, California, USA, on Monday, 21 September 2020 at 03:49 (GMT)
Click here to search our database for earlier earthquakes in the same area since 1900!
