Terremoto moderado mag. 4.0 - 37 miles N of Petaluma, Sonoma County, California, USA, Monday, 19 Apr. 2021 -

Terremoto moderado mag. 4.0 - 37 miles N of Petaluma, Sonoma County, California, USA, Monday, 19 Apr. 2021

Terremoto moderado magnitud 4.0 at 3 km depth

20 Apr 00:56 UTC: Primero en informar: VolcanoDiscovery después de 6 horas.
19 Apr 18:54: Magnitud recalculada de 4.2 a 4.1. Profundidad recalculada de 9.0 a 2.8 km (de 5.6 a 1.7 mi). Ubicación del epicentro corregida 4 km (2.5 mi) al NNE.
19 Apr 18:58: Magnitud recalculada de 4.1 a 4.2.
19 Apr 21:38: Profundidad recalculada de 10.0 a 2.9 km (de 6.2 a 1.8 mi).
Update Mon, 19 Apr 2021, 18:57
Moderate magnitude 4.1 quake hits 22 miles north of Santa Rosa, California, United States in the morning
4.1 quake 19 Apr 11:50 am (GMT -7)
4.1 quake 19 Apr 11:50 am (GMT -7)
A magnitude 4.1 earthquake near Santa Rosa, Sonoma County, California, USA, was reported only 6 minutes ago by the United States Geological Survey, considered the key international and national agency that monitors seismic activity in the US. The earthquake occurred at a very shallow depth of 1.7 miles beneath the epicenter in the morning on Monday 19 April 2021 at 11:50 am 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 4.1 earthquake 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.
In Cobb (pop. 1,800) located 5 miles from the epicenter, the quake should have been felt as light shaking.
Weak shaking might have been felt in Healdsburg (pop. 11,700) located 13 miles from the epicenter, Clearlake (pop. 15,200) 15 miles away, Windsor (pop. 27,500) 15 miles away, and Santa Rosa (pop. 175,000) 22 miles away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Rohnert Park (pop. 42,400) located 29 miles from the epicenter, Petaluma (pop. 60,400) 36 miles away, and Napa (pop. 80,400) 39 miles away.
Download the Volcanoes & Earthquakes app to get one of the fastest seismic alerts online:
Android | IOS

Earthquake data:

Fecha & hora: 19 Apr 2021 18:50:58 UTC -
Hora local al epicentro: 19 Apr 11:50 am (GMT -7)
Magnitud: 4
Profundidad: 2.9 km
Epicentro latitud / longitud: 38.757°N / 122.72283°W (Condado de Sonoma, Condado de Kern, Estados Unidos)
Volcán mas cercano: Clear Lake (28 km / 17 mi)
Nearby towns and cities:
7 km al S de Cobb (pop: 1,780) --> ¡Vea sismos cercanos!
21 km al NE de Healdsburg (Sonoma County) (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!
59 km al N de Petaluma (pop: 60,400) --> ¡Vea sismos cercanos!
64 km al NO de Napa (pop: 80,400) --> ¡Vea sismos cercanos!
108 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: 6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) More info
Show interactive Map
[smaller] [bigger]
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!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake 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.
RevistaProfundidadUbicaciónFuente
4.02.9 km3km SW of Anderson Springs, CAUSGS
4.03 kmNORTHERN CALIFORNIA, USAEMSC
unknownn/aNear Point Reyes Station, California, USAVolcanoDiscovery

User reports for this quake (117)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Contribute:
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!
Cobb, Ca / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : That was wild | 5 users found this interesting.  
Santa Rosa California (30.8 km S of epicenter) [Map] / Light shaking (MMI IV) / 2-5 s : Sitting in my truck. It felt light someone was lightly pushing my truck side to side. | 2 users found this interesting.  
Boggs Mtn, lake county, near geothermal fields (29.2 km ESE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : It was a shaky rattling. I was on a concrete slab of enclosed patio. Noticed the sound just as it started  
Windsor (23.2 km SSW of epicenter) [Map] / Very weak shaking (MMI II) / 1-2 s : Heard trinkets in my room shake, that’s the only way I knew, it only went for a second but I definitely felt it. Thought someone hit my house  
Santa Rosa, CA / Light shaking (MMI IV) / very short : Felt a decent jolt followed by brief shaking of my 4 story apartment building. | 2 users found this interesting.  
Windsor, ca (23.1 km SSW of epicenter) [Map] / Weak shaking (MMI III) / single vertical bump : Felt a sudden jump and distant sounding “bang.” Dog barked right before. Hi | 2 users found this interesting.  
Santa Rosa, CA (27.7 km S of epicenter) [Map] / Weak shaking (MMI III) / 1-2 s : shaking smoothly side to side | 2 users found this interesting.  
Sebastopol, California / Weak shaking (MMI III) / horizontal (sideways) swinging / 1-2 s : Just sitting at my desk and heard the house creaking and then a slight sway. Looked at my lamp chain to see if it was moving, and it was ever so lightly. Thanks.  
Santa Rosa. Rincon Valley / Very weak shaking (MMI II) / single vertical bump / 1-2 s : I was sitting at the computer. Sounds like a boom - like something hit the house. Then small shaking and I got nauseous. That’s my tell tale sign. Others in my household felt nothing.  
Santa Rosa California / Very weak shaking (MMI II) / complex motion difficult to describe / very short : Computer screen shook...small vibration... felt nauseous... | One user found this interesting.  
Guerneville CA / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s : Like gentle shake side to side | One user found this interesting.  
santa rosa / Light shaking (MMI IV) / single vertical bump / 2-5 s : was very fast | One user found this interesting.  
Calistoga / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s : Thought it was a truck going by, but didn't stop for several seconds. Close to about 10 seconds of side to side shaking. | One user found this interesting.  
Santa Rosa / Very weak shaking (MMI II) / rattling, vibrating / 1-2 s : My bed shook | One user found this interesting.  
Windsor, caO / Light shaking (MMI IV) : Slight shaking like something hit my house | One user found this interesting.  
Working in Healdsburg, CA / Light shaking (MMI IV) / single vertical bump / 1-2 s : Felt the whole house shake! | One user found this interesting.  
Calistoga (23.9 km SE of epicenter) [Map] / Light shaking (MMI IV) / vibration and rolling / 2-5 s : I felt my bed vibrating and shaking . | One user found this interesting.  
Napa (60.6 km SE of epicenter) [Map] / Very weak shaking (MMI II) / vibration and rolling / 5-10 s : Slight small shaking about 10 seconds | One user found this interesting. (reported through our app)  
9.5 km E of epicenter [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s : It felt like a gust of wind was attempting to lift the building. Plexiglass protectors were shaking. | One user found this interesting.  
Windsor, CA / Light shaking (MMI IV) / 1-2 s : big jolt/shook building - then tiny bit of shaking | One user found this interesting.  
Healdsburg (19.1 km SW of epicenter) [Map] / Light shaking (MMI IV) / vibration and rolling / 2-5 s : Heavy rolling shake and vertical felt worse upstairs | One user found this interesting. (reported through our app)  
35.6 km SE of epicenter [Map] / Weak shaking (MMI III) : East west east movement. 2 seconds. Heard items rattle. | One user found this interesting.  
Sebastopol, CA (41.9 km S of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / very short : A hard shift east to west | One user found this interesting.  
Santa Rosa / Moderate shaking (MMI V) / horizontal (sideways) swinging / 2-5 s : Shaking a few seconds Waited for more | One user found this interesting.  
Fulton road (31.2 km S of epicenter) [Map] / Very weak shaking (MMI II) / single vertical bump / very short : Window settling and nudge of couch | One user found this interesting.  
Windsor ca (23.1 km SSW of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s : House shaking | One user found this interesting.  
Santa Rosa (31.8 km S of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 10-15 s : I was on a second story and I just started moving | One user found this interesting.  
72 km SSE of epicenter [Map] / Very weak shaking (MMI II) / rattling, vibrating / 1-2 s : Slight vibration that lasted a few seconds. | One user found this interesting.  
San Francisco (112.4 km SSE of epicenter) [Map] / Very weak shaking (MMI II) / 1-2 s : Apartment slightly rocking | One user found this interesting.  
Santa Rosa westwind bld 3725 (97.8 km SSW of epicenter) [Map] / Strong shaking (MMI VI) : Shake  
72 km SSE of epicenter [Map] / Very weak shaking (MMI II) / rattling, vibrating / 1-2 s : Slight vibration that lasted a few seconds.  
Windsor, CA (24.6 km SSW of epicenter) [Map] / Light shaking (MMI IV) / single vertical bump / 1-2 s : a hard jolt that caused shaking but no damage  
Windsor california (24.3 km SSW of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / very short
Healdsburg CA (18.9 km SW of epicenter) [Map] / Moderate shaking (MMI V) / single vertical bump / 1-2 s : Very quick jolt  
Montgomery Village Shopping Center, Farmers Lane, / Weak shaking (MMI III) / 2-5 s : Because you asked ; ) | One user found this interesting.  
Healdsburg CA (18.9 km SW of epicenter) [Map] / Moderate shaking (MMI V) / single vertical bump / 1-2 s : Very quick jolt  
Calistoga, Ca / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : Was obvious but was quick  
San Jose / Light shaking (MMI IV) / single lateral shake / 5-10 s : It was scary  
San Francisco (110.5 km SSE of epicenter) [Map] / Weak shaking (MMI III) / simple rolling (tilting sideways along one direction) / 2-5 s : Building swayed back & forth, cat did not notice.  
96.8 km SSE of epicenter [Map] / not felt (reported through our app)
Yuba City / Light shaking (MMI IV) / single lateral shake / 1-2 s : Was fast asleep and felt a large jolt and the house cracked. Felt like a truck hit the house or the front door was 8x15 feet big and someone slammed it. Weird dream?  
22.9 km SSW of epicenter [Map] / Very weak shaking (MMI II)
Windsor (23.2 km SSW of epicenter) [Map] / Very weak shaking (MMI II) / 1-2 s : Heard trinkets in my room shake, that’s the only way I knew, it only went for a second but I definitely felt it. Thought someone hit my house  
Santa Rosa / Light shaking (MMI IV) : Light shaking for 3 seconds  
41.6 km SSW of epicenter [Map] / Weak shaking (MMI III) / single lateral shake / very short : Single bump that shook the house and caused hanging lights to swing lightly.  
Santa Rosa / not felt
Santa Rosa / Light shaking (MMI IV) / horizontal (sideways) swinging / 1-2 s
Santa Rosa, ca (32.8 km S of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / very short
Windsor / Weak shaking (MMI III)
Sebastopol, CA / Very weak shaking (MMI II) / simple rolling (tilting sideways along one direction) / 1-2 s
Loch Lomond,ca / Moderate shaking (MMI V) / rattling, vibrating / 5-10 s : Short onset to strong shaking then subsiding quickly after 10 seconds strong shaking.  
Santa Rosa / Very weak shaking (MMI II) / rattling, vibrating / 1-2 s : furniture rattled  
San francisco / Very weak shaking (MMI II) / single lateral shake / very short : In bed, small ahaking  
SANTA ROSA, CA / Light shaking (MMI IV) / single lateral shake / 1-2 s : Moderate shaking and strong jolt  
124.8 km E of epicenter [Map] / not felt (reported through our app)
Cobb / Light shaking (MMI IV) / 5-10 s : Felt bigger then 4.0  
Healdsburg / Very weak shaking (MMI II) / very short : One bump is all.  
Santa Rosa / Light shaking (MMI IV) / 5-10 s : One jolt; then shuttering  
Santa Rosa (31.8 km S of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 10-15 s : I was on a second story and I just started moving  
Mission Blvd. Santa Rosa / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s : Jolting from side to side  
Sebstopol, California / Weak shaking (MMI III) / 1-2 s
Mission Blvd. Santa Rosa / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s : Jolting from side to side  
Sebastopol / Very weak shaking (MMI II) / 1-2 s
Los alamos rd and hwy 12 santa rosa ca (34.1 km SSE of epicenter) [Map] / Light shaking (MMI IV) / 2-5 s
Santa Rosa,Ca (34.3 km S of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake / 1-2 s : Single gentle jolt and house creaked.  
Santa Rosa, CA / Light shaking (MMI IV) / 10-15 s
Santa Rosa / Weak shaking (MMI III) / 1-2 s : I'm in Oakmont near Kenwood.  
Windsor, Ca 95492 (24.9 km SSW of epicenter) [Map] / Very weak shaking (MMI II) / single vertical bump / very short
Ross, CA (89.1 km S of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 1-2 s : My bed and objects around the room rattled. I thought it could be the laundry machine or dryer below me, but it felt larger than it normally does. I got up to ask my family if they felt anything and one said they also thought it was the dryer. I ended up checking online and there was an earthquake at the same time.  
112.3 km SSE of epicenter [Map] / Weak shaking (MMI III) / rattling, vibrating / 2-5 s : Short rattling felt in my 3rd floor flat near Buena Vista park.  
San Francisco / Weak shaking (MMI III) / single lateral shake / 1-2 s
healdsburg, CA / not felt : friend reported to me. i was on conference call. didn't notice anything.  
Sonoma, California (52.1 km SSE of epicenter) [Map] / Very weak shaking (MMI II)
Calistoga / Very weak shaking (MMI II) / very short : Not really more like I heard my house shaking so felt like 0 sounded like 4  
Santa Rosa / Weak shaking (MMI III) / rattling, vibrating / very short
Santa Rosa, CA / Weak shaking (MMI III) / simple rolling (tilting sideways along one direction) / 5-10 s
santa rosa ca / Very weak shaking (MMI II) / very short : very brief shake, 1 second or less  
in my flat, at the 12th floor. Mission Bay, San Fr / Very weak shaking (MMI II) / horizontal (sideways) swinging / very short
Healdsburg (19.2 km SW of epicenter) [Map] / Moderate shaking (MMI V) / both vertical and horizontal swinging / very short : First jolt smaller than second, maybe 2 seconds apart. Both sharp short jolts.  
Santa Rosa, CA (31.2 km S of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 1-2 s : Heard it more than felt it. The Windows rattled.  
147 Redwing Dr., Santa Rosa CA 95409 / Weak shaking (MMI III) / 1-2 s : Felt a light jolt sideways. I live in a mfg house.  
Santa Rosa / Weak shaking (MMI III) / single lateral shake / 2-5 s
Windsor California / Very weak shaking (MMI II) / single lateral shake / 1-2 s
Calistoga / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
windsor, ca / Light shaking (MMI IV) / vibration and rolling / 2-5 s
geyserville, ca / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s
Windsor, CA / Light shaking (MMI IV)
Sebastopol / not felt
Santa Rosa / Very weak shaking (MMI II) / single vertical bump / 1-2 s
Healdsburg, Ca (20.5 km SW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s : I was sitting at a table and felt a low vibration but also one gentle but very noticable swaying from left to right. The kitchen window also rattled during this  
San francisco / Very weak shaking (MMI II)
San Francisco / Weak shaking (MMI III) / 1-2 s
5570 Skylane Boulevard, Santa Rosa, CA (27.4 km SSW of epicenter) [Map] / Weak shaking (MMI III) / single vertical bump / very short
Forestville, CA / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s
WINDSOR / Weak shaking (MMI III) / single vertical bump / 2-5 s
windsor, california / Very weak shaking (MMI II) / very short
95409 (34.8 km S of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 5-10 s
San Francisco / Light shaking (MMI IV) / rattling, vibrating / 1-2 s
San Rafael / Weak shaking (MMI III) / 2-5 s
SAN RAFAEL / Light shaking (MMI IV) / 1-2 s
Windsor / Weak shaking (MMI III) / single vertical bump / 1-2 s
20.7 km SW of epicenter [Map] / Light shaking (MMI IV) / 2-5 s
Rocklin (127.5 km E of epicenter) [Map] / not felt (reported through our app)
Santa Rosa (38.8 km S of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s
san rafael, ca (91.1 km S of epicenter) [Map] / Weak shaking (MMI III)
95401 (21.4 km SSW of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 2-5 s
Burbank / Very weak shaking (MMI II) / single vertical bump / 1-2 s
Healdsburg, California (20.7 km SW of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake (reported through our app)
Windsor, ca (23.1 km SSW of epicenter) [Map] / Very weak shaking (MMI II) / very short
San Francisco, CA (110.6 km S of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 1-2 s
Healdsburg / Weak shaking (MMI III) / rattling, vibrating / 2-5 s
santa rosa ca 95401 / Weak shaking (MMI III) / horizontal (sideways) swinging / very short
Geyserville / Weak shaking (MMI III) / rattling, vibrating / 1-2 s
San Francisco (112.8 km SSE of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 1-2 s
627 taylor st, san francisco ca (111.1 km SSE of epicenter) [Map] / Light shaking (MMI IV) / 2-5 s
Healdsburg CA (18.1 km SW of epicenter) [Map] / Weak shaking (MMI III) / 2-5 s
San Francisco (111.5 km SSE of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / very short
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:
  • Weather reports
  • Tsunami alerts
  • Design upgrades
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Additional seismic data sources
  • Improved content in English
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Copyrights: VolcanoDiscovery y otras fuentes como se ha señalado.
Uso de material: Most texts and images, in particular photographs, on this website are protected by copyright. Further reproduction and use of without authorization is usually not consented. If you are not sure or need licensing rights for photographs, for example for publications and commercial use, please contact us.