Sismo leggero mag. 3.4 - 41 km a nord da Santa Rosa, Contea di Sonoma County, Contea di Kern, Stati Uniti, sabato, 30 apr 2022 20:17 (GMT -7) -

Sismo leggero magnitudine 3.4 a 2.8 km di profondità

1 May 03:20 UTC: Primo a segnalare: RaspberryShake dopo 2 minuti.
1 May 03:22: Ora utilizzando nuova fonte di dati: USGS

Update Sun, 1 May 2022, 03:30

Magnitude 3.4 earthquake strikes near Windsor, Sonoma County, California, USA

3.4 quake 30 Apr 8:17 pm (GMT -7)

A magnitude 3.4 earthquake near Windsor, Sonoma County, California, USA, was reported only 13 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 1.7 miles beneath the epicenter in the evening on Saturday, April 30th, 2022, at 8:17 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.
Our monitoring service identified a second report from the citizen-seismograph network of RaspberryShake which listed the quake at magnitude 3.4 as well. A third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same quake at magnitude 3.4.
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 5 miles from the epicenter.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Cloverdale (pop. 8,800) located 11 miles from the epicenter, Russian River (pop. 11,700) 13 miles away, Russian River (pop. 11,700) 13 miles away, Clearlake (pop. 15,200) 15 miles away, Windsor (pop. 27,500) 17 miles away, and Santa Rosa (pop. 175,000) 25 miles away. In Rohnert Park (pop. 42,400, 32 miles away), and Napa (pop. 80,400, 45 miles away), the quake was probably not felt.

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Earthquake data

Dettagli del sismo

Data e ora	1 May 2022 03:17:37 UTC -
Ora locale all'epicentro	sabato, 30 apr 2022 20:17 (GMT -7)
Status	Confermato
Magnitudine	3.4
Prof.	2.8 km
Epicentro latitudine / longitudine	38.799°N / 122.8125°W (Contea di Sonoma, Contea di Kern, Stati Uniti)
Antipode	38.799°S / 57.188°E
Intensità di scuotimento	Scuotimento leggero
Sentito	4 rapporti
Fonte dati primaria	USGS (United States Geological Survey)
Vulcano più vicino	Clear Lake (19 km / 12 mi)
Luoghi vicini	8 km OSO da Cobb (pop: 1,780) \| Mappa \| Sismi nelle vicinanze 18 km E da Cloverdale (Sonoma County) (pop: 8,810) \| Mappa \| Sismi nelle vicinanze 22 km NNE da Russian River (Sonoma County) (pop: 11,700) \| Mappa \| Sismi nelle vicinanze 22 km NNE da Russian River (pop: 11,700) \| Mappa \| Sismi nelle vicinanze 24 km SO da Clearlake (Lake County) (pop: 15,200) \| Mappa \| Sismi nelle vicinanze 28 km N da Windsor (Sonoma County) (pop: 27,500) \| Mappa \| Sismi nelle vicinanze 41 km NNO da Santa Rosa (pop: 175,000) \| Mappa \| Sismi nelle vicinanze 52 km N da Rohnert Park (pop: 42,400) \| Mappa \| Sismi nelle vicinanze 72 km NO da Napa (pop: 80,400) \| Mappa \| Sismi nelle vicinanze 117 km ONO da Sacramento (pop: 490,700) \| Mappa \| Sismi nelle vicinanze
Meteo all'epicentro al momento del sismo	Clear Sky 11.4°C (53 F), humidity: 63%, wind: 4 m/s (7 kts) from WNW
Energia sismica rilasciata stimata	7.9 x 10⁹ joules (2.21 MWh, equivalent to 1.9 tons of TNT) \| about seismic energy

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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.	Prof.	Ubicazione	Fonte
3.4	2.8 km	5km WNW of The Geysers, CA	USGS
3.0	5 km	NORTHERN CALIFORNIA	EMSC
3.4	2.8 km	Northern California	RaspberryShake

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User reports for this quake (4)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.

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Porterville ca (447.2 km SE of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s

Geyserville / Weak shaking (MMI III) / very short

Geyserville / Light shaking (MMI IV) / 1-2 s

Geyserville / Weak shaking (MMI III) / very short

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Sismo leggero mag. 3.4 - 41 km a nord da Santa Rosa, Contea di Sonoma County, Contea di Kern, Stati Uniti, sabato, 30 apr 2022 20:17 (GMT -7) - writeAge(1651375057)