Weak mag. 2.0 earthquake - 8km W of Cobb, CA, USA, on Wednesday, 3 Mar 2021 5:37 pm (GMT -8) -
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Weak magnitude 2.0 earthquake at 2 km depth
4 Mar 01:40 UTC: First to report: EMSC after 2 minutes.
4 Mar 01:40: Now using data updates from USGS
4 Mar 04:50: Magnitude recalculated from 2.1 to 2.0. Hypocenter depth recalculated from 1.9 to 2.2 km (from 1.2 to 1.4 mi).
4 Mar 01:40: Now using data updates from USGS
4 Mar 04:50: Magnitude recalculated from 2.1 to 2.0. Hypocenter depth recalculated from 1.9 to 2.2 km (from 1.2 to 1.4 mi).
Date & time: 4 Mar 2021 01:37:49 UTC -
Local time at epicenter: Wednesday, 3 Mar 2021 5:37 pm (GMT -8)
Magnitude: 2
Depth: 2.2 km
Epicenter latitude / longitude: 38.83233°N / 122.81033°W

Nearest volcano: Clear Lake (16 km / 10 mi)
Nearby towns and cities:
8 km (5 mi) W of Cobb (pop: 1,780) --> See nearby quakes!
16 km (10 mi) S of Kelseyville (pop: 3,350) --> See nearby quakes!
18 km (11 mi) E of Cloverdale (Sonoma County) (pop: 8,810) --> See nearby quakes!
21 km (13 mi) SW of Clearlake (Lake County) (pop: 15,200) --> See nearby quakes!
22 km (14 mi) W of Hidden Valley Lake (pop: 5,580) --> See nearby quakes!
25 km (16 mi) N of Healdsburg (Sonoma County) (pop: 11,700) --> See nearby quakes!
25 km (16 mi) N of Russian River (pop: 11,700) --> See nearby quakes!
32 km (20 mi) N of Windsor (Sonoma County) (pop: 27,500) --> See nearby quakes!
44 km (28 mi) N of Santa Rosa (pop: 175,000) --> See nearby quakes!
117 km (73 mi) NW of Concord (pop: 128,700) --> See nearby quakes!
Weather at epicenter at time of quake:
Scattered Clouds
12.9°C (55 F), humidity: 55%, wind: 5 m/s (10 kts) from SE
Primary data source: USGS (United States Geological Survey)Scattered Clouds

Estimated released energy: 6.3 x 107 joules (17.5 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 |
2.0 | 2.2 km | 8km W of Cobb, CA, USA | USGS |
2.0 | 2 km | 8km W of Cobb, CA, USA | EMSC |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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