Séisme modéré mag. 4.7 - 18 km au sud-ouest de Novato, Comté de Marin County, Californie, États-Unis, lundi, 20 déc. 2021 12:10 (GMT -8) -

Séisme modéré mag. 4.7 - 18 km au sud-ouest de Novato, Comté de Marin County, Californie, États-Unis, lundi, 20 déc. 2021 12:10 (GMT -8) Séisme modéré mag. 4.7 - 18 km au sud-ouest de Novato, Comté de Marin County, Californie, États-Unis, lundi, 20 déc. 2021 12:10 (GMT -8)

Séisme modéré magnitude 4.7 à 17 km de profondeur

20 Dec 20:16 UTC: Premier à signaler: VolcanoDiscovery après 5 minutes.
20 Dec 20:16: Maintenant en utilisant une nouvelle source de données: RaspberryShake

Détails du séisme

Date et l'heure20 Dec 2021 20:10:55 UTC -
Heure locale à l'épicentrelundi, 20 déc. 2021 12:10 (GMT -8)
StatutConfirmé
Magnitude4.7
Profondeur17.3 km
Épicentre latitude / longitude38.04039°N / 122.76278°W (Marin County, Californie, États-Unis)
Antipode38.04°S / 57.237°E
Intensité d'agitationSecousses faibles
Senti34 rapports
Source de données principaleRaspberryShake (RaspberryShake)
Volcan le plus prèsClear Lake (103 km / 64 mi)
Lieux à proximité5 km SE de Point Reyes Station (pop: 848) | Carte | Séismes à proximité
18 km OSO de Novato (pop: 55,500) | Carte | Séismes à proximité
22 km ONO de San Rafael (pop: 59,200) | Carte | Séismes à proximité
24 km SSO de Petaluma (pop: 60,400) | Carte | Séismes à proximité
38 km ONO de Richmond (pop: 109,700) | Carte | Séismes à proximité
42 km NO de San Francisco (pop: 864,800) | Carte | Séismes à proximité
45 km S de Santa Rosa (pop: 175,000) | Carte | Séismes à proximité
45 km O de Vallejo (pop: 121,300) | Carte | Séismes à proximité
109 km NO de San José (pop: 1,026,900) | Carte | Séismes à proximité
126 km OSO de Sacramento (pop: 490,700) | Carte | Séismes à proximité
Météo à l'épicentre au moment du séismeOvercast Clouds 9.2°C (49 F), humidity: 89%, wind: 1 m/s (2 kts) from S
Énergie sismique estimée libérée7.1 x 1011 joules (197 MWh, équivalent à 169 tonnes de TNT) | about seismic energy
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Si vous avez ressenti ce tremblement de terre (ou si vous étiez près de l'épiccentre), merci de partager votre expérience et envoyer un témoignage "Je l'ai ressenti !" D'autres utilisateurs aimeraient le lire !
Si vous n'avez pas ressenti le séisme même si vous étiez dans la zone, signalez-le aussi, s-v-p! Votre contribution est précieuse pour la science des tremblements de terre, l'analyse des risques sismiques et les efforts d'atténuation. Vous pouvez utiliser l'emplacement de votre appareil ou la carte pour indiquer l'endroit où vous étiez pendant le séisme. Merci!

Données pour le même séisme indiquées par différentes agences

Info : Plus les agences signalent le même séisme et publient des données similaires, plus vous pouvez avoir confiance dans les données. Il faut normalement jusqu'à quelques heures pour que les paramètres sismiques soient calculés avec une précision quasi optimale.
Mag.ProfondeurLieuSource
4.717 kmNear Santa Cruz, California, USARaspberryShake

Témoignages pour ce séisme (39)

Les rapports des utilisateurs estiment l'intensité perçue des secousses du sol en fonction de l' Échelle MMI (Modified Mercalli Intensity Scale).
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Arcata California (332.9 km NNW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 30-60 s : Was laying in bed when the bed started shaking harshly! Alarmed family and pets and shook entire house lightly. | One user found this interesting.  
Willits / Weak shaking (MMI III) / 2-5 s : Chair shook gently, house made cracking noises,hanging lamp swayed, cats on alert, We stood up to decide what to do. Alert came just before motion. | One user found this interesting.  
Kaiser (48.7 km SE of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 20-30 s : While sitting on the 5 th floor waiting room of a medical building. Noticed building movement back and forth also saw plexiglass screens moving. Some people did not notice. Others definitely did. 6.2 off of Eureka, ca.  
Anderson, CA (270.4 km N of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 15-20 s : Laying in bed and felt the bed shaking gently back and forth. Looked at surrounding objects and they were swaying as well.  
96080 (155.2 km NNE of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake / 5-10 s : I felt my chair swaying, thought it was me, then noticed my Christmas tree swaying as well as my ceiling fan pulls  
3179 california st, san francisco / Weak shaking (MMI III) / single lateral shake / very short : I felt a slight shake/jolt. Enough to cause me to pause and assess whether I needed to take more action. My building in San Francisco is a wooden structure, three stories high, pre-1906 earthquake, so it slightly rocked. Definitely enough to make me take   
Santa Cruz / Very weak shaking (MMI II) / horizontal (sideways) swinging / 15-20 s : I thought it was a truck on our street except for that it lasted too long. Felt like my couch was doing a little shimmy back-and-forth.  
Oildale, Kern, California (444.1 km SE of epicenter) [Map] / not felt (reported through our app)
San Francisco CA (41.8 km SE of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 20-30 s
lake merritt (52.1 km ESE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 1-2 s
Outer Richmond Sam Francisco (37.1 km SE of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s
San francisco (42.1 km SE of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 10-15 s : It woke me up from a nap  
Santa Cruz (133.6 km SSE of epicenter) [Map] / Weak shaking (MMI III) / 1-2 s : I was upstairs, I felt shaking, and heard things shaking  
San Francisco (43.3 km SE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : Thought it was people stomping for a moment  
Crescent city, ca. (428.2 km NNW of epicenter) [Map] / Light shaking (MMI IV) : Sitting on couch. Lampshades swinging, water shaking in glass  
Paradise, california (224.8 km NNE of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 15-20 s : Was watching TV and my trailer started shaking back and forth but the wind wasn't blowing  
San Francisco (40.2 km SE of epicenter) [Map] / Weak shaking (MMI III) / very short
San Francisco, CA (44.9 km SE of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 5-10 s : 4th floor, just felt a mild swaying for 5 seconds or so.  
Clipper mills, ca (216.7 km NE of epicenter) [Map] / Weak shaking (MMI III) / complex motion difficult to describe / 5-10 s : Upstairs felt as if bills were trampoline downstares  
Uniontown, Humboldt, California (335 km NNW of epicenter) [Map] / Strong shaking (MMI VI) / complex motion difficult to describe / 15-20 s
Pebble Beach, California (178.4 km SSE of epicenter) [Map] / Very weak shaking (MMI II) / vibration and rolling / 5-10 s : working on my bed and the bed and pillows and laptop started shaking  
Trinidad Ca (358.8 km NNW of epicenter) [Map] / Weak shaking (MMI III) : Inside house  
Chico ca (205.7 km NNE of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s
Santa cruz ca (134.8 km SSE of epicenter) [Map] / Weak shaking (MMI III) / vertical swinging (up and down) / 5-10 s
san francisco / Very weak shaking (MMI II) / rattling, vibrating / 5-10 s
Marin / not felt : San Rafael had no falling items or signs of shaking.  
Marin / not felt : San Rafael had no falling items or signs of shaking.  
1960 jackson street san Francisco / Weak shaking (MMI III) / 10-15 s
Santa Cruz / Very weak shaking (MMI II) / rattling, vibrating / 10-15 s : Windows shaking. Mostly noticeable because of the slight noise they made. (reported through our app)  
West Sacramento / not felt / 20-30 s : Ceiling Lamps swinging slightly for several seconds  
Susanville / not felt (reported through our app)
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