Terremoto moderado mag. 3.9 - 2.8 miles SSW of Cobb, Lake County, California, USA, miércoles, 12 ago. 2020 11:45

Terremoto moderado mag. 3.9 - 2.8 miles SSW of Cobb, Lake County, California, USA, miércoles, 12 ago. 2020 11:45 Terremoto moderado mag. 3.9 - 2.8 miles SSW of Cobb, Lake County, California, USA, miércoles, 12 ago. 2020 11:45

Terremoto moderado magnitud 3.9 a 4.1 km de profundidad

12 Aug 11:46 UTC: Primero en informar: USGS después de 59 secundos.
Aug 12 11:49: Magnitud recalculada de 4.1 a 4.0.
Profundidad recalculada de 8.0 a 4.1 km.
Aug 12 11:51: Magnitud recalculada de 4.0 a 3.9.

Detalles del terremoto

Fecha y hora12 Aug 2020 11:45:43 UTC
Hora local en el epicentro
Prof.4.1 km
Epicentro latitud / longitud38.78667°N / 122.74917°W (Condado de Lake, California, Estados Unidos)
Antipode38.787°S / 57.251°E
Intensidad del temblorTemblor débil
Sentido3 informes
Fuente primaria de datosUSGS (United States Geological Survey)
Volcán mas cercanoClear Lake (21 km / 13 mi)
Lugares cercanos5 km al SSO de Cobb (pop: 1,780) | En el mapa | Sismos cercanos
17 km al O de Hidden Valley Lake (pop: 5,580) | En el mapa | Sismos cercanos
22 km al SSO de Clearlake (Lake County) (pop: 15,200) | En el mapa | Sismos cercanos
22 km al NNE de Russian River (Sonoma County) (pop: 11,700) | En el mapa | Sismos cercanos
22 km al NNE de Russian River (pop: 11,700) | En el mapa | Sismos cercanos
27 km al NNE de Windsor (Sonoma County) (pop: 27,500) | En el mapa | Sismos cercanos
39 km al N de Santa Rosa (pop: 175,000) | En el mapa | Sismos cercanos
50 km al N de Rohnert Park (pop: 42,400) | En el mapa | Sismos cercanos
68 km al NO de Napa (pop: 80,400) | En el mapa | Sismos cercanos
111 km al ONO de Sacramento (pop: 490,700) | En el mapa | Sismos cercanos
Energía sísmica estimada liberada4.5 x 1010 joules (12.4 MWh, equivalente a 10.7 toneladas de TNT) | about seismic energy
Mostrar mapa interactivo
[Reducir] [Agrandar]
If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
If you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable to earthquake science, seismic hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

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.
3.94.1 km1km NNE of The Geysers, CA (USA)USGS
3.94 kmNorthern California (USA)EMSC

User reports for this quake (10)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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!
5655 Saint Helena Road, Santa Rosa CA / Weak shaking (MMI III) : I did not feel a "shaking" at all, but only one powerful jerk/thrust.  
cobb / Light shaking (MMI IV) : woke me up  
Santa Rosa, CA / Very weak shaking (MMI II)
Noe Valley (United States, 119 km S of epicenter) : Just a light jiggle in SF (reported through EMSC)  
Lower Lake (United States, 18 km NE of epicenter) : I FELT A LITTLE SHAKE IN OUR TRAILER...I THOUGHT IT WAS A TREMOR AT THE TIME... (reported through EMSC)  
San Francisco (United States of America, 114 km S of epicenter) : Mild shake, 5 seconds long. (reported through EMSC)  
Ross (United States, 91 km S of epicenter) : Was sound asleep but a small shake plus rattling sound woke me up. (reported through EMSC)  
Suisun (United States, 87 km SE of epicenter) : Was in the tub, not sure if I was feeling a shake, but looked up to see toner sloshing in bottle a little. No reaction from Chihuahuas and cat. (reported through EMSC)  
Napa (United States, 67 km SE of epicenter) : Minor back and forth for less than 5 seconds. In bed, St. Helena. (reported through EMSC)  
Santa Rosa (United States of America, 36 km S of epicenter) : I was awake but lying down. Sharp jolt felt from North, wall mounted shelves on brackets made cracking sound as jolt felt. Slight swaying motion to room briefly upon standing. (reported through EMSC)  
Volcanoes & Earthquakes - new app for Android

Earlier earthquakes in the same area

Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version
Why is there advertising on this site?
Support us - Help us upgrade our services!
We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Detailed quake stats
  • Additional seismic data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.
Use of material: Most text and images on our websites are owned by us. Re-use is generally not permitted without authorization. Contact us for licensing rights.
Volcanoes & Earthquakes
VolcanoDiscovery Home
Adventure & Study Travel
Tours to Volcanoes and Volcanic Areas: walking tours, photo tours, study tours Get our newsletter!
Company info
Contact | Legal info | Terms & conditions
Follow us
Follow us on facebook Follow us on Instagram Follow us on Twitter Visit our Youtube channel
EN | DE | EL | ES | FR | IT | RU
VolcanoDiscovery GmbH, Germany, Reg. nr.: HRB 103744, EU Tax Id: DE 310 395 322 owned and created by
Dr. Tom Pfeiffer, volcanologist, volcano photographer, tour organizer member of
Volcanological Society
Ecotourism Greece
Insured by R+V
VolcanoDiscovery © 2004- All Rights Reserved | Privacy - cookie settings