Sismo leggero mag. 3.0 - 29 km a sud-est da Ukiah, Contea di Mendocino County, Contea di Kern, Stati Uniti, venerdì, 15 ott 2021 12:54 (GMT -7) -

Sismo leggero mag. 3.0 - 29 km a sud-est da Ukiah, Contea di Mendocino County, Contea di Kern, Stati Uniti, venerdì, 15 ott 2021 12:54 (GMT -7)

Sismo leggero magnitudine 3.0 at 4 km depth

15 Oct 19:56 UTC: Primo a segnalare: USGS dopo 2 minuti.
16 Oct 01:48: Magnitudine ricalcolata da 3.4 a 3.0. Profondità ricalcolata da 0.3 a 4.4 km (da 0.2 a 2.7 mi).
Update Fri, 15 Oct 2021, 20:00
Small earthquake of magnitude 3.4 just reported 18 miles southeast of Ukiah, California, United States
3.4 quake 15 Oct 12:54 pm (GMT -7)
3.4 quake 15 Oct 12:54 pm (GMT -7)
An earthquake of magnitude 3.4 occurred only 6 minutes ago 18 miles southeast of Ukiah, California, United States, the United States Geological Survey reported.
The quake hit at a very shallow depth of 0.2 miles beneath the epicenter near Ukiah, Mendocino County, California, USA, around noon on Friday, October 15th, 2021, at 12:54 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.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 3.4 earthquake as well.
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 Hopland (pop. 760) located 5 miles from the epicenter, and Cloverdale (pop. 8,800) 9 miles away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Kelseyville (pop. 3,400) located 11 miles from the epicenter, Ukiah (pop. 15,900) 18 miles away, Clearlake (pop. 15,200) 22 miles away, Russian River (pop. 11,700) 24 miles away, Russian River (pop. 11,700) 24 miles away, and Windsor (pop. 27,500) 29 miles away. In Santa Rosa (pop. 175,000, 38 miles away), the quake was probably not felt.

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Earthquake data

Data & ora: 15 Oct 2021 19:54:07 UTC -
Ora locale a epicentro: venerdì, 15 ott 2021 12:54 (GMT -7)
Magnitudine: 3
Prof.: 4.4 km
Epicentro latitudine / longitudine: 38.92933°N / 123.03517°W (Contea di Mendocino, Contea di Kern, Stati Uniti)
Antipode: 38.929°S / 56.965°E
Vulcano più vicino: Clear Lake (24 km / 15 mi)
Nearby towns and cities:
9 km SE da Hopland (pop: 756) --> Vedi sismi vicini
14 km N da Cloverdale (Sonoma County) (pop: 8,810) --> Vedi sismi vicini
21 km SSO da North Lakeport (pop: 3,310) --> Vedi sismi vicini
29 km SSE da Ukiah (pop: 15,900) --> Vedi sismi vicini
36 km O da Clearlake (Lake County) (pop: 15,200) --> Vedi sismi vicini
38 km NNO da Russian River (Sonoma County) (pop: 11,700) --> Vedi sismi vicini
38 km NNO da Russian River (pop: 11,700) --> Vedi sismi vicini
47 km NNO da Windsor (Sonoma County) (pop: 27,500) --> Vedi sismi vicini
61 km NNO da Santa Rosa (pop: 175,000) --> Vedi sismi vicini
139 km ONO da Sacramento (pop: 490,700) --> Vedi sismi vicini
Weather at epicenter at time of quake:
Clear Sky 25.8°C (78 F), humidity: 25%, wind: 1 m/s (3 kts) from SSW
Fonte dati primaria: USGS (United States Geological Survey)
Stima dell'energia sismica liberata: 2 x 109 joules (554 kWh, equivalent to 0.477 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.Prof.UbicazioneFonte
3.04.4 km14km N of Cloverdale, CAUSGS
2.010 kmNEVADAEMSC

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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Translate
North Lakeport, Lake, California (15.7 km NE of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake / 1-2 s : in bed  
Lakeport / Weak shaking (MMI III) / complex motion difficult to describe / 2-5 s : Moderate jolt. One major and several minor lasting a few seconds  
Lakeport / Weak shaking (MMI III) / 1-2 s : A little shaky  
spring valley / Weak shaking (MMI III) / vibration and rolling / 1-2 s : shaking  
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