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Séisme modéré mag. 4.5 - 61 km au sud-est de South Lake Tahoe, Comté d'El Dorado County, Californie, États-Unis, lundi, 8 août 2022 13:44 (GMT -7) -

Séisme modéré mag. 4.5 - 61 km au sud-est de South Lake Tahoe, Comté d\'El Dorado County, Californie, États-Unis, lundi,  8 août 2022 13:44 (GMT -7) Séisme modéré mag. 4.5 - 61 km au sud-est de South Lake Tahoe, Comté d\'El Dorado County, Californie, États-Unis, lundi,  8 août 2022 13:44 (GMT -7)

Séisme modéré magnitude 4.5 à 5.4 km de profondeur

8 Aug 20:48 UTC: Premier à signaler: VolcanoDiscovery après 4 minutes.
8 Aug 20:48: Maintenant en utilisant une nouvelle source de données: USGS
... [show all] ...
9 Aug 00:18: Magnitude recalculée de 4.4 à 4.5.
Update Mon, 8 Aug 2022, 20:54

Moderate magnitude 4.4 quake hits 38 miles southeast of South Lake Tahoe, California, United States around noon

4.4 quake 8 Aug 1:44 pm (GMT -7)
4.4 quake 8 Aug 1:44 pm (GMT -7)
An earthquake of magnitude 4.4 occurred only 10 minutes ago 38 miles southeast of South Lake Tahoe, California, United States, the United States Geological Survey reported.
The quake hit at a very shallow depth of 3.2 miles beneath the epicenter near South Lake Tahoe, El Dorado County, California, USA, around noon on Monday, August 8th, 2022, at 1:44 pm 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.
Our monitoring service identified a second report from the citizen-seismograph network of RaspberryShake which listed the quake at magnitude 4.4 as well. A third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same quake at magnitude 4.4.
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 Coleville (pop. 500) located 3 miles from the epicenter, the quake should have been felt as light shaking.
Weak shaking might have been felt in Topaz Ranch Estates (pop. 1,500) located 11 miles from the epicenter, Smith Valley (pop. 1,600) 15 miles away, Smith (pop. 1000) 17 miles away, Gardnerville Ranchos (pop. 11,300) 26 miles away, Gardnerville (pop. 5,700) 30 miles away, and Gardnerville (pop. 5,700) 30 miles away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include South Lake Tahoe (pop. 21,700) located 38 miles from the epicenter, and Reno (pop. 241,400) 68 miles away.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

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Détails du séisme

Date et l'heure8 Aug 2022 20:44:14 UTC -
Heure locale à l'épicentrelundi, 8 août 2022 13:44 (GMT -7)
Profondeur5.4 km
Épicentre latitude / longitude38.58167°N / 119.446°W (Comté de Mono, Californie, États-Unis)
Antipode sismique38.582°S / 60.554°E
Intensité d'agitationSecousses légères
Senti16 rapports
Source de données principaleUSGS (United States Geological Survey)
Volcan le plus prèsMono Lake (74 km / 46 mi)
Lieux à proximité6 km ENE de Coleville (pop: 495) | Carte | Séismes à proximité
18 km SSE de Topaz Ranch Estates (Nevada) (pop: 1,500) | Carte | Séismes à proximité
24 km SSO de Smith Valley (Nevada) (pop: 1,600) | Carte | Séismes à proximité
43 km SE de Gardnerville Ranchos (Nevada) (pop: 11,300) | Carte | Séismes à proximité
57 km SSE de Johnson Lane (Douglas County, Nevada) (pop: 6,490) | Carte | Séismes à proximité
61 km SE de South Lake Tahoe (El Dorado County) (pop: 21,700) | Carte | Séismes à proximité
110 km SSE de Reno (Nevada) (pop: 241,400) | Carte | Séismes à proximité
178 km E de Sacramento (pop: 490,700) | Carte | Séismes à proximité
Météo à l'épicentre au moment du séismeBroken Clouds 28.4°C (83 F), humidity: 31%, wind: 1 m/s (1 kts) from SSE
Énergie sismique estimée libérée3.5 x 1011 joules (98.6 MWh, équivalent à 84.8 tonnes de TNT) | about seismic energy
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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.
4.55.4 km8km NNE of Walker, CAUSGS
4.55.4 kmCalifornia-Nevada Border RegionRaspberryShake


Seismic station: Columbia College, Columbia, CA, USA (CMB/BK network) | Distance from quake: 102 km / 63 mi | Show on map | Station Info
Seismic station Columbia College, Columbia, CA, USA: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
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Témoignages pour ce séisme (20)

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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Yosemite, California (93.5 km S of epicenter) [Map] / Light shaking (MMI IV) / complex motion difficult to describe / 30-60 s : Building Shaking, walls could be heard and felt rattling, bed moving in rolling type motion, light to moderate shaking. Probably not likely to crack windows but did hear some sounds throughout building. Not weak but not intense either. | 5 users found this interesting.  
South Lake Tahoe (59.6 km NW of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / 1-2 s : Felt a quick vibration. A couple moments later felt a longer light swaying sensation lasting 2 seconds | 5 users found this interesting.  
Antioch, Contra Costa, California (209.7 km WSW of epicenter) [Map] / Very weak shaking (MMI II) / 1-2 s : Sitting in desk chair with wheels. Felt slightly dizzy. Looked up to see hanging light slightly swaying. | 3 users found this interesting.  
Dorrington CA (78.6 km WSW of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / very short : I was sitting watching a video on my computer. The entire cabin shook. Felt like it was passing through under the structure of house. | 3 users found this interesting.  
Camp connell, CA 95223 (67.8 km SSW of epicenter) [Map] / Weak shaking (MMI III) : Just a quick shake with some small rolling following initial shake | 4 users found this interesting.  
near Twain Harte, Tuolumne, California (71.9 km SW of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / 1-2 s : felt the shake from my office at home. | 3 users found this interesting.  
Topaz Ranch Estates, NV 15 mi SSW of Smith Valley, / Strong shaking (MMI VI) / both vertical and horizontal swinging : The quake was centered NOT in Coleville, CA it was here in Topaz Ranch Estates, NV 15 mi SSW of Smith Valley, NV it felt like at least a 5.0 I thought it would never end, my overhead table light was swinging for 5-10 minutes and I was hanging on to my kit | 2 users found this interesting.  
AArnold California (85.2 km WSW of epicenter) [Map] / Light shaking (MMI IV) : Resting on bed | 2 users found this interesting.  
Hanford ca. / not felt : Not felt | 2 users found this interesting. (reported through our app)  
Fresno, California (206.4 km S of epicenter) [Map] / not felt : Did feel it (reported through our app)  
Calabasas, Los Angeles, California (492.9 km S of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)
Coleville, CA near the KOA ⛺️ / Moderate shaking (MMI V) / vertical swinging (up and down) / 2-5 s : The powers poles were swaying back and forth.  
Arnold, California. / Weak shaking (MMI III) / simple rolling (tilting sideways along one direction) / 5-10 s : Long but light shaking.  
Murphys / not felt
Smith, NV / Weak shaking (MMI III) / vibration and rolling / 10-15 s
Twain Harte Ca / Light shaking (MMI IV) / vibration and rolling / 10-15 s : Felt it roll one way than roll came back In Twain Harte ca  
San Andreas / Very weak shaking (MMI II) / simple rolling (tilting sideways along one direction) / 1-2 s
Reno / not felt (reported through our app)
Murphys, CA HWY. 4/ 4 MI. EAST OF Murphys / Very weak shaking (MMI II) / rattling, vibrating / 5-10 s
Sonora California / Weak shaking (MMI III) / single vertical bump / very short (reported through our app)

Earlier earthquakes in the same area

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