Light mag. 3.4 earthquake - 26 mi north of Santa Rosa, Sonoma County, California, USA, on Sunday, 13 Jun 2021 8:16 pm (GMT -7) -
Light magnitude 3.4 earthquake at 4 km depth
14 Jun 03:17 UTC: First to report: USGS after 1 minute.
14 Jun 03:19: Magnitude recalculated from 4.0 to 3.5. Hypocenter depth recalculated from 9.0 to 3.1 km (from 5.6 to 1.9 mi). Epicenter location corrected by 2 km (1.2 mi) towards NNE.
14 Jun 11:28: Magnitude recalculated from 3.5 to 3.4. Hypocenter depth recalculated from 3.1 to 3.6 km (from 1.9 to 2.2 mi).
Update Mon, 14 Jun 2021, 03:24Small magnitude 3.5 earthquake 26 miles northwest of Santa Rosa, California, United States
3.5 quake 13 Jun 8:16 pm (GMT -7)
A magnitude 3.5 earthquake near Santa Rosa, Sonoma County, California, USA, was reported only 8 minutes ago by the United States Geological Survey, considered the key international and national agency that monitors seismic activity in the US. The earthquake occurred at a very shallow depth of 1.9 miles beneath the epicenter in the evening on Sunday 13 June 2021 at 8:16 pm local time. 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 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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Date & time: 14 Jun 2021 03:16:24 UTC -
Local time at epicenter:
Sunday, 13 Jun 2021 8:16 pm (GMT -7)
Depth: 3.6 km
Epicenter latitude / longitude: 38.80517°N / 122.82783°W
, United States
Nearest volcano: Clear Lake
(19 km / 12 mi)
Nearby towns and cities:9 km (6 mi) WSW of Cobb
(pop: 1,780) --> See nearby quakes!16 km (10 mi) E of Cloverdale (Sonoma County)
(pop: 8,810) --> See nearby quakes!22 km (14 mi) N of Healdsburg (Sonoma County)
(pop: 11,700) --> See nearby quakes!22 km (14 mi) N of Russian River
(pop: 11,700) --> 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!53 km (33 mi) NNW of Rohnert Park
(pop: 42,400) --> See nearby quakes!118 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:
Few Clouds 16.3°C
(61 F), humidity: 70%, wind: 3 m/s (6 kts) from WSW
Primary data source: USGS
(United States Geological Survey)
Estimated released energy: 7.9 x 109
joules (2.21 megawatt hours, equivalent to 1.9 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.
|3.4||3.6 km||7km WNW of The Geysers, CA||USGS|
User reports for this quake (5)
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11671 Anderson springs road Middletown ca / Moderate shaking (MMI V) / rattling, vibrating / 5-10 s : Shook my chair and rattled my windows. | 2 users found this interesting.
West Sacramento, Yolo, California (115.3 km E of epicenter) [Map] / not felt
Cobb, Lake, California (13.6 km ENE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
kelseyville / Moderate shaking (MMI V) / horizontal (sideways) swinging / 5-10 s : Felt shaking, but aquarium's water sloshed side to side. The quake was a rolling side to side motion for 6-10 seconds.
Norwalk ca / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s
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