Débil terremoto magnitud 3.2 - 2.3 miles S of Cobb, Lake County, California, USA, viernes, 20 nov. 2020 -
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Minor magnitude 3.2 earthquake at 2 km depth
20 Nov 19:53 UTC: Primero en informar: USGS después de 2 minutos.
Update Fri, 20 Nov 2020, 19:54
Magnitude 3.2 earthquake strikes near Santa Rosa, California
3.2 quake 3km ENE of The Geysers, CA, USA, 20 Nov 11.50 am (GMT -8)
An earthquake of magnitude 3.2 occurred in the morning on Friday 20 November 2020 at 11.50 am local time near the town of Cobb, California, as reported by the United States Geological Survey (USGS).
According to preliminary data, the quake was located at a very shallow depth of 1.1 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 at VolcanoDiscovery identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 3.2 as well.
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. Weak shaking might have been felt in Cobb (pop. 1,800) located 2 miles from the epicenter, Middletown (pop. 1,300) 6 miles away, Hidden Valley Lake (pop. 5,600) 9 miles away, Lower Lake (pop. 1,300) 10 miles away, and Geyserville (pop. 900) 11 miles away.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Windsor (pop. 27,500) located 17 miles from the epicenter, Santa Rosa (pop. 175,000) 24 miles away, and Rohnert Park (pop. 42,400) 31 miles away.
According to preliminary data, the quake was located at a very shallow depth of 1.1 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 at VolcanoDiscovery identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 3.2 as well.
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. Weak shaking might have been felt in Cobb (pop. 1,800) located 2 miles from the epicenter, Middletown (pop. 1,300) 6 miles away, Hidden Valley Lake (pop. 5,600) 9 miles away, Lower Lake (pop. 1,300) 10 miles away, and Geyserville (pop. 900) 11 miles away.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Windsor (pop. 27,500) located 17 miles from the epicenter, Santa Rosa (pop. 175,000) 24 miles away, and Rohnert Park (pop. 42,400) 31 miles away.
Earthquake data:
Hora local al epicentro: viernes, 20 nov 2020 11:50 (GMT -8)
Magnitud: 3.2
Profundidad: 1.7 km
Epicentro latitud / longitud: 38.78883°N / 122.725°W

Volcán mas cercano: Clear Lake (21 km / 13 mi)
Nearby towns and cities:
4 km al S de Cobb (pop: 1,780) --> ¡Vea sismos cercanos!
10 km al ONO de Middletown (pop: 1,320) --> ¡Vea sismos cercanos!
21 km al SSO de Clearlake (Lake County) (pop: 15,200) --> ¡Vea sismos cercanos!
23 km al SSE de Kelseyville (pop: 3,350) --> ¡Vea sismos cercanos!
23 km al NNE de Healdsburg (Sonoma County) (pop: 11,700) --> ¡Vea sismos cercanos!
25 km al E de Cloverdale (Sonoma County) (pop: 8,810) --> ¡Vea sismos cercanos!
28 km al NNE de Windsor (Sonoma County) (pop: 27,500) --> ¡Vea sismos cercanos!
39 km al N de Santa Rosa (pop: 175,000) --> ¡Vea sismos cercanos!
3915 km al ONO de Washington (District of Columbia) (pop: 601,700) --> ¡Vea sismos cercanos!
3915 km al ONO de Washington DC (District of Columbia) (pop: 601,700) --> ¡Vea sismos cercanos!
Weather at epicenter at time of quake:
Clear Sky
14.5°C (58 F), humidity: 39%, wind: 0 m/s (1 kts) from SSW
Fuente primaria de datos: USGS (United States Geological Survey)
Clear Sky

Energía liberada estimada: 4 x 109 joules (1.11 megawatt hours, equivalent to 0.951 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.
Magnitud | Profundidad | Ubicación | Fuente |
M 3.2 | 1.7 km | 3km ENE of The Geysers, CA, USA | USGS |
M 2.8 | 4 km | NORTHERN CALIFORNIA, USA | EMSC |
User reports for this quake (2)
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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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!
Lakeport, CA / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : My cats ran away and ten seconds later it started shaking and there was noise like a semi-Truck! I rolled off my bed to the floor face down with my hands covering the back of my my head and my pony tails were still taped onto the sides of my head. I cried like little girl and whimpered. Suddenly I heard a loud blast from an air can horn that my wife was blasting at me! I could not hear her as my ears rang but I could read her lips and she said, "you know what that was for" and motioned for me to | One user found this interesting.
8 km NNE of epicenter [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging
Earlier earthquakes in the same area since 1900
Débil terremoto magnitud 3.2 - 2.3 miles S of Cobb, Lake County, California, USA, viernes, 20 nov. 2020- Date / time UTC| Mag |Profundidad|Age|Distancia| Details
- 18 Apr 1906 13:12| 7.9 |11.7km / 7.3mi|hace 115 años|117km / 72mi| The 1906 San Francisco Earthquake (USA)
- 25 Apr 1992 18:06| 7.2 |9.9km / 6.2mi|hace 29 años|215km / 134mi| 20km SSW of Rio Dell, California (USA)
- 18 Oct 1989 00:04| 6.9 |17.2km / 10.7mi|hace 31 años|209km / 130mi| Loma Prieta, California Earthquake (USA)
- 26 Apr 1992 11:18| 6.6 |22km / 13mi|hace 29 años|237km / 147mi| Offshore Northern California (USA)
- 01 Jul 1911 22:00| 6.6 |unknown|hace 110 años|191km / 119mi| San Francisco Bay Area, California (USA)
- 26 Apr 1992 07:41| 6.5 |18.8km / 11.7mi|hace 29 años|241km / 150mi| Offshore Northern California (USA)
- 29 Oct 1909 06:45| 6.4 |unknown|hace 111 años|228km / 142mi| Northern California (USA)
- 22 Oct 1926 13:35| 6.3 |10km / 6.2mi|hace 94 años|235km / 146mi| Offshore Central California (USA)
- 24 Apr 1984 21:15| 6.2 |8.2km / 5.1mi|hace 37 años|188km / 117mi| Northern California (USA)
- 22 Oct 1926 12:35| 6.1 |unknown|hace 94 años|244km / 151mi| Offshore Central California (USA)
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