Moderate mag. 4.0 earthquake - 26 mi north of Santa Rosa, Sonoma County, California, USA, on Saturday, 12 Jun 2021 11:54 pm (GMT -7) -

Moderate mag. 4.0 earthquake - 26 mi north of Santa Rosa, Sonoma County, California, USA, on Saturday, 12 Jun 2021 11:54 pm (GMT -7)

Moderate magnitude 4.0 earthquake at 3 km depth

13 Jun 06:55 UTC: First to report: USGS after 59 seconds.
13 Jun 06:58: Magnitude recalculated from 4.0 to 3.5. Hypocenter depth recalculated from 9.0 to 2.5 km (from 5.6 to 1.6 mi). Epicenter location corrected by 1 km (0.6 mi) towards WNW.
... [show all] ...
13 Jun 21:54: Magnitude recalculated from 4.1 to 4.0.
Update Sun, 13 Jun 2021, 07:00
Small magnitude 3.5 earthquake 26 miles northwest of Santa Rosa, California, United States
3.5 quake 12 Jun 11:54 pm (GMT -7)
3.5 quake 12 Jun 11:54 pm (GMT -7)
The United States Geological Survey reported a magnitude 3.5 quake in the United States near Santa Rosa, Sonoma County, California, only 6 minutes ago. The earthquake hit late at night on Saturday 12 June 2021 at 11:54 pm local time at a very shallow depth of 1.6 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.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 3.9 earthquake.
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 6 miles from the epicenter, and Cloverdale (pop. 8,800) 10 miles away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Healdsburg (pop. 11,700) located 14 miles from the epicenter, Russian River (pop. 11,700) 14 miles away, Clearlake (pop. 15,200) 15 miles away, Windsor (pop. 27,500) 18 miles away, Santa Rosa (pop. 175,000) 26 miles away, and Rohnert Park (pop. 42,400) 33 miles away. In Petaluma (pop. 60,400, 41 miles away), the quake was probably not felt.
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Earthquake data:

Date & time: 13 Jun 2021 06:54:47 UTC -
Local time at epicenter: Saturday, 12 Jun 2021 11:54 pm (GMT -7)
Magnitude: 4
Depth: 2.7 km
Epicenter latitude / longitude: 38.80783°N / 122.82917°W (Sonoma, California, United States)
Nearest volcano: Clear Lake (19 km / 12 mi)
Nearby towns and cities:
9 km (6 mi) W of Cobb (pop: 1,780) --> See nearby quakes!
16 km (10 mi) E of Cloverdale (Sonoma County) (pop: 8,810) --> See nearby quakes!
24 km (15 mi) SW of Clearlake (Lake County) (pop: 15,200) --> See nearby quakes!
29 km (18 mi) N of Windsor (Sonoma County) (pop: 27,500) --> See nearby quakes!
42 km (26 mi) NNW of Santa Rosa (pop: 175,000) --> See nearby quakes!
50 km (31 mi) SE of Ukiah (pop: 15,900) --> See nearby quakes!
53 km (33 mi) NNW of Rohnert Park (pop: 42,400) --> See nearby quakes!
66 km (41 mi) NNW of Petaluma (pop: 60,400) --> See nearby quakes!
119 km (74 mi) WNW of Sacramento (pop: 490,700) --> See nearby quakes!
120 km (75 mi) NNW of San Francisco (pop: 864,800) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 13.3°C (56 F), humidity: 97%, wind: 2 m/s (4 kts) from NW
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) More info
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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.
Mag.DepthLocationSource
4.02.7 km7km WNW of The Geysers, CAUSGS
3.210 kmNORTHERN CALIFORNIAEMSC

User reports for this quake (18)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Boggs Mtn, lake county, near geothermal fields / Light shaking (MMI IV) / 5-10 s : I believe I was about at the epicenter, especially after looking at your map | 18 users found this interesting.  
Kelseyville Ca. (20.5 km NNE of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 1-2 s : More so heard the structure of the house rattle. Felt a little shake | 7 users found this interesting.  
Los Angeles, California (668.7 km SE of epicenter) [Map] / Moderate shaking (MMI V) / both vertical and horizontal swinging / 15-20 s : I’m a Filipino and I was enjoying my trip. Last night, I was sleeping then I felt a shaking. I asked my aunties and uncles if u felt. They didn’t. During the earthquake I was in the bathroom. The hanger was shaking. Then the water shaked and it spilled. I ran and left it open. Then 3 hours, I came back and the hanger was gone. It fell. | One user found this interesting.  
Cloverdale (16.6 km W of epicenter) [Map] / Light shaking (MMI IV) / 1-2 s : My bed and house shook (almost like an intense shiver) | 2 users found this interesting.  
Larkspur ca / Weak shaking (MMI III) / rattling, vibrating / 5-10 s : NA | One user found this interesting.  
Grass Valley, Nevada, California (157.3 km ENE of epicenter) [Map] / not felt (reported through our app)
San Rafael, CA (26.3 km NNE of epicenter) [Map] / not felt : Didn’t notice it.  
Napa (70.5 km SE of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 2-5 s : Mild. Building joints popped a lot. (reported through our app)  
Novato, CA (4.1 km NNE of epicenter) [Map] / not felt : I’m expecting a big one.  
Foster city / Very weak shaking (MMI II) / 10-15 s
Klamath Falls, Oregon (387.4 km NNE of epicenter) [Map] / not felt (reported through our app)
Dry creek Healdsburg / Light shaking (MMI IV) / rattling, vibrating / 1-2 s
Cloverdale, ca / Very weak shaking (MMI II) / both vertical and horizontal swinging / 2-5 s
Redding ca ? / Light shaking (MMI IV) / simple rolling (tilting sideways along one direction) / 5-10 s
Loch Lomond (13.1 km ENE of epicenter) [Map] / Light shaking (MMI IV) / both vertical and horizontal swinging / 5-10 s
Dry creek Healdsburg / Light shaking (MMI IV) / rattling, vibrating / 1-2 s
Knights Valley / Very weak shaking (MMI II) / rattling, vibrating / 2-5 s
Lucerne / not felt
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