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Ukiah ca / Light shaking (MMI IV) / rattling, vibrating / very short
Terremoto moderado mag. 3.8 - 24 miles N of Santa Rosa, Sonoma County, California, USA, jueves, 3 mar 2022 03:39 (GMT -8) -
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Terremoto moderado magnitud 3.8 a 0.4 km de profundidad
3 Mar 11:43 UTC: Primero en informar: USGS después de 4 minutos.
3 Mar 11:45: Magnitud recalculada de 3.5 a 3.9.
3 Mar 15:32: Magnitud recalculada de 3.9 a 3.8.
3 Mar 19:04: Profundidad recalculada de 0.6 a 0.4 km (de 0.4 a 0.2 mi).
3 Mar 11:45: Magnitud recalculada de 3.5 a 3.9.
3 Mar 15:32: Magnitud recalculada de 3.9 a 3.8.
3 Mar 19:04: Profundidad recalculada de 0.6 a 0.4 km (de 0.4 a 0.2 mi).
Update Thu, 3 Mar 2022, 11:51
Small 3.9 quake hits near Santa Rosa, Sonoma County, California, USA3.9 quake 3 Mar 3:39 am (GMT -8)
A very shallow magnitude 3.9 earthquake was reported early morning near Santa Rosa, Sonoma County, California, USA.
According to the United States Geological Survey, the quake hit on Thursday, March 3rd, 2022, at 3:39 am local time at a very shallow depth of 0.4 miles. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. 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 3.9 as well. A third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same quake at magnitude 3.9.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In Cobb (pop. 1,800) located 4 miles from the epicenter, the quake should have been felt as light shaking.
Weak shaking might have been felt in Russian River (pop. 11,700) located 13 miles from the epicenter, Russian River (pop. 11,700) 13 miles away, Clearlake (pop. 15,200) 14 miles away, and Windsor (pop. 27,500) 16 miles away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Santa Rosa (pop. 175,000) located 23 miles from the epicenter, Rohnert Park (pop. 42,400) 30 miles away, Petaluma (pop. 60,400) 38 miles away, and Napa (pop. 80,400) 42 miles away.
According to the United States Geological Survey, the quake hit on Thursday, March 3rd, 2022, at 3:39 am local time at a very shallow depth of 0.4 miles. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. 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 3.9 as well. A third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same quake at magnitude 3.9.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In Cobb (pop. 1,800) located 4 miles from the epicenter, the quake should have been felt as light shaking.
Weak shaking might have been felt in Russian River (pop. 11,700) located 13 miles from the epicenter, Russian River (pop. 11,700) 13 miles away, Clearlake (pop. 15,200) 14 miles away, and Windsor (pop. 27,500) 16 miles away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Santa Rosa (pop. 175,000) located 23 miles from the epicenter, Rohnert Park (pop. 42,400) 30 miles away, Petaluma (pop. 60,400) 38 miles away, and Napa (pop. 80,400) 42 miles away.
Earthquake data
Detalles del terremoto
| Fecha y hora | 3 Mar 2022 11:39:58 UTC - |
| Hora local en el epicentro | jueves, 3 mar 2022 03:39 (GMT -8) |
| Status | Confirmado |
| Magnitud | 3.8 |
| Prof. | 0.4 km |
| Epicentro latitud / longitud | 38.7805°N / 122.75817°W  (Condado de Sonoma, California, Estados Unidos) |
| Antipode | 38.781°S / 57.242°E |
| Intensidad del temblor | Temblor ligero |
| Sentido | 1 informe |
| Fuente primaria de datos | USGS (United States Geological Survey) |
| Volcán mas cercano | Clear Lake (21 km / 13 mi) |
| Lugares cercanos | 6 km al SSO de Cobb (pop: 1,780) | En el mapa | Sismos cercanos 21 km al NNE de Russian River (Sonoma County) (pop: 11,700) | En el mapa | Sismos cercanos 21 km al NNE de Russian River (pop: 11,700) | En el mapa | Sismos cercanos 23 km al SSO de Clearlake (Lake County) (pop: 15,200) | En el mapa | Sismos cercanos 26 km al N de Windsor (Sonoma County) (pop: 27,500) | En el mapa | Sismos cercanos 38 km al N de Santa Rosa (pop: 175,000) | En el mapa | Sismos cercanos 49 km al N de Rohnert Park (pop: 42,400) | En el mapa | Sismos cercanos 62 km al N de Petaluma (pop: 60,400) | En el mapa | Sismos cercanos 68 km al NO de Napa (pop: 80,400) | En el mapa | Sismos cercanos 112 km al O de Sacramento (pop: 490,700) | En el mapa | Sismos cercanos |
| Tiempo en el epicentro en el momento del sismo | Overcast Clouds  4.4°C (40 F), humidity: 80%, wind: 2 m/s (3 kts) from NW |
| Energía sísmica estimada liberada | 3.2 x 1010 joules (8.78 MWh, equivalente a 7.56 toneladas de TNT) | about seismic energy |
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.
| Revista | Prof. | Ubicación | Fuente |
| 3.8 | 0.4 km | 0km NNW of The Geysers, CA | USGS |
| 3.9 | 5 km | NORTHERN CALIFORNIA | EMSC |
| 3.8 | 0.4 km | Northern California | RaspberryShake |
User reports for this quake (1)
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Earlier earthquakes in the same area
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