Light mag. 3.2 earthquake - 22 mi north of Santa Rosa, Sonoma County, California, USA, on Monday, 1 Mar 2021 2:26 pm (GMT -8) -
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Light magnitude 3.2 earthquake at 1 km depth
1 Mar 22:29 UTC: First to report: USGS after 3 minutes.
Update Mon, 1 Mar 2021, 22:33
Small magnitude 3.2 quake hits 22 miles north of Santa Rosa, California, United States early afternoon3.2 quake 1 Mar 2:26 pm (GMT -8)
The United States Geological Survey reported a magnitude 3.2 quake in the United States near Santa Rosa, Sonoma County, California, only 6 minutes ago. The earthquake hit early afternoon on Monday 1 March 2021 at 2:26 pm local time at a very shallow depth of 0.6 miles. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Cobb (pop. 1,800) located 4 miles from the epicenter.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Healdsburg (pop. 11,700) located 13 miles from the epicenter, Clearlake (pop. 15,200) 15 miles away, Windsor (pop. 27,500) 15 miles away, and Santa Rosa (pop. 175,000) 22 miles away. In Rohnert Park (pop. 42,400, 29 miles away), Petaluma (pop. 60,400, 37 miles away), and Napa (pop. 80,400, 40 miles away), the quake was probably not felt.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Cobb (pop. 1,800) located 4 miles from the epicenter.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Healdsburg (pop. 11,700) located 13 miles from the epicenter, Clearlake (pop. 15,200) 15 miles away, Windsor (pop. 27,500) 15 miles away, and Santa Rosa (pop. 175,000) 22 miles away. In Rohnert Park (pop. 42,400, 29 miles away), Petaluma (pop. 60,400, 37 miles away), and Napa (pop. 80,400, 40 miles away), the quake was probably not felt.
Earthquake data:
Date & time: 1 Mar 2021 22:26:44 UTC -
Local time at epicenter: Monday, 1 Mar 2021 2:26 pm (GMT -8)
Magnitude: 3.2
Depth: 1.0 km
Epicenter latitude / longitude: 38.76117°N / 122.73133°W
(Sonoma, California, United States)Nearest volcano: Clear Lake (23 km / 14 mi)
Nearby towns and cities:
7 km (4 mi) S of Cobb (pop: 1,780) --> See nearby quakes!
16 km (10 mi) WSW of Hidden Valley Lake (pop: 5,580) --> See nearby quakes!
21 km (13 mi) NE of Healdsburg (Sonoma County) (pop: 11,700) --> See nearby quakes!
21 km (13 mi) NE of Russian River (pop: 11,700) --> See nearby quakes!
24 km (15 mi) SSW of Clearlake (Lake County) (pop: 15,200) --> See nearby quakes!
25 km (15 mi) NNE of Windsor (Sonoma County) (pop: 27,500) --> See nearby quakes!
36 km (22 mi) N of Santa Rosa (pop: 175,000) --> See nearby quakes!
47 km (29 mi) N of Rohnert Park (pop: 42,400) --> See nearby quakes!
109 km (68 mi) W of Sacramento (pop: 490,700) --> See nearby quakes!
113 km (70 mi) NNW of San Francisco (pop: 864,800) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky
17°C (63 F), humidity: 33%, wind: 2 m/s (3 kts) from E
Primary data source: USGS (United States Geological Survey)Clear Sky
17°C (63 F), humidity: 33%, wind: 2 m/s (3 kts) from EEstimated released energy: 4 x 109 joules (1.11 megawatt hours, equivalent to 0.951 tons of TNT) 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 |
| 3.2 | 1 km | 3km SE of The Geysers, CA, USA | USGS |
User reports for this quake (2)
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San Bruno (128.2 km SSE of epicenter) [Map] / Very weak shaking (MMI II)
Williams California / Very weak shaking (MMI II) / rattling, vibrating : Very weak
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