Terremoto leve mag. 3.3 - Lake County, 22 miles N of Santa Rosa, Sonoma County, California, USA, Monday, 26 Apr. 2021 -
Terremoto leve magnitud 3.3 at 0 km depth
26 Apr 04:09 UTC: Primero en informar: EMSC después de 3 minutos.
26 Apr 04:09: Ahora usando una nueva fuente de datos: USGS
Update Mon, 26 Apr 2021, 04:15Small magnitude 3.3 earthquake 22 miles north of Santa Rosa, California, United States
3.3 quake 25 Apr 9:05 pm (GMT -7)
A very shallow magnitude 3.3 earthquake was reported in the evening near Santa Rosa, Sonoma County, California, USA.
According to the United States Geological Survey, the quake hit on Sunday 25 April 2021 at 9:05 pm local time at a very shallow depth of 0.2 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 European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 3.3 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 Middletown (pop. 1,300) 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 Hidden Valley Lake (pop. 5,600) located 8 miles from the epicenter, Healdsburg (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) 16 miles away, and Santa Rosa (pop. 175,000) 22 miles away. In Rohnert Park (pop. 42,400, 29 miles away), the quake was probably not felt.
Download the Volcanoes & Earthquakes app
to get one of the fastest seismic alerts online:Android
Fecha & hora: 26 Apr 2021 04:05:56 UTC -
Hora local al epicentro:
Sunday, 25 Apr 2021 21:05 (GMT -7)
Profundidad: 0.4 km
Epicentro latitud / longitud: 38.75367°N / 122.699°W
(Condado de Lake
, Condado de Kern
, Estados Unidos
Volcán mas cercano: Clear Lake
(25 km / 16 mi)
Nearby towns and cities:7 km al O de Middletown
(pop: 1,320) --> ¡Vea sismos cercanos!22 km al NE de Healdsburg (Sonoma County)
(pop: 11,700) --> ¡Vea sismos cercanos!22 km al NE de Russian River
(pop: 11,700) --> ¡Vea sismos cercanos!24 km al SSO de Clearlake (Lake County)
(pop: 15,200) --> ¡Vea sismos cercanos!25 km al NNE de Windsor (Sonoma County)
(pop: 27,500) --> ¡Vea sismos cercanos!35 km al N de Santa Rosa
(pop: 175,000) --> ¡Vea sismos cercanos!46 km al N de Rohnert Park
(pop: 42,400) --> ¡Vea sismos cercanos!62 km al NO de Napa
(pop: 80,400) --> ¡Vea sismos cercanos!106 km al O de Sacramento
(pop: 490,700) --> ¡Vea sismos cercanos!112 km al NNO de San Francisco
(pop: 864,800) --> ¡Vea sismos cercanos!
Fuente primaria de datos: USGS
(United States Geological Survey)
Energía liberada estimada: 5.6 x 109
joules (1.56 megawatt hours, equivalent to 1.34 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.
|3.3||0.4 km||2km SSW of Anderson Springs, CA, USA||USGS|
|2.7||5 km||NORTHERN CALIFORNIA, USA||EMSC|
User reports for this quake (8)
Leave a comment if you find a particular report interesting or want to add to it.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
Piedmont / Light shaking (MMI IV) / 5-10 s : Felt larger than a 3.3 | One user found this interesting.
Berkeley / Light shaking (MMI IV) / rattling, vibrating / 1-2 s : I felt it | One user found this interesting.
San Francisco / Very weak shaking (MMI II) / very short : My bed shook very briefly. I’m on the 3rd floor apartment on a steep hill | One user found this interesting.
Loch Lomond (11.6 km N of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
San Francisco / Very weak shaking (MMI II) / very short : My bed shook very briefly. I’m on the 3rd floor apartment on a steep hill
San Francisco / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s
107.8 km SSE of epicenter [Map] / Light shaking (MMI IV) / rattling, vibrating / 1-2 s
Van nuys / Very weak shaking (MMI II) / very short
Earlier earthquakes in the same area
Click here to search our database for earlier earthquakes in the same area since 1900!