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Moderate mag. 4.7 earthquake - 12 mi northwest of Truckee, Nevada County, California, USA, on 6 May 9:35 pm (GMT -7) -

Moderate mag. 4.7 earthquake - 12 mi northwest of Truckee, Nevada County, California, USA, on 6 May 9:35 pm (GMT -7) Moderate mag. 4.7 earthquake - 12 mi northwest of Truckee, Nevada County, California, USA, on 6 May 9:35 pm (GMT -7)

Moderate magnitude 4.7 earthquake at 10 km depth

7 May 04:36 UTC: First to report: USGS after 1 minute.
7 May 04:39: Magnitude recalculated from 4.2 to 5.1. Hypocenter depth recalculated from 8.0 to 3.3 km (from 5 to 2.1 mi). Epicenter location corrected by 20 km (13 mi) towards NW.
7 May 04:42: Magnitude recalculated from 5.1 to 4.7.
7 May 07:10: Hypocenter depth recalculated from 3.3 to 10.1 km (from 2.1 to 6.3 mi).
Update Fri, 7 May 2021, 04:42
Magnitude 5.1 earthquake strikes near Truckee, Nevada County, California, USA
5.1 quake 6 May 9:35 pm (GMT -7)
5.1 quake 6 May 9:35 pm (GMT -7)
An earthquake of magnitude 5.1 occurred only 7 minutes ago 11 miles northwest of Truckee, California, United States, the United States Geological Survey reported.
The quake hit at a very shallow depth of 2.1 miles beneath the epicenter near Truckee, Nevada County, California, USA, in the evening on Thursday 6 May 2021 at 9:35 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.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 5.1 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 Soda Springs (pop. 81) located 10 miles from the epicenter, Truckee (pop. 16,300) 11 miles away, Cold Springs (pop. 8,500) 24 miles away, and Reno (pop. 241,400) 27 miles away, the quake should have been felt as light shaking.
Weak shaking might have been felt in Sun Valley (pop. 19,300) located 30 miles from the epicenter, Sparks (pop. 96,100) 30 miles away, Spanish Springs (pop. 15,100) 35 miles away, South Lake Tahoe (pop. 21,700) 40 miles away, and Fernley (pop. 19,400) 58 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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Earthquake data

Earthquake details

Date & timeMay 7, 2021 04:35:14 UTC -
Local time at epicenter6 May 9:35 pm (GMT -7)
StatusConfirmed
Magnitude4.7
Depth10.1 km
Epicenter latitude / longitude39.461°N / 120.3145°W (Nevada County, California, United States)
Antipode39.461°S / 59.686°E
Shaking intensityLight shaking
Felt1172 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoSoda Lakes (124 km / 77 mi)
Nearby towns and cities15 km (9 mi) SSE of Sierraville (pop: 200) | Show on map | Quakes nearby
19 km (12 mi) NW of Truckee (pop: 16,300) | Show on map | Quakes nearby
38 km (24 mi) SW of Cold Springs (pop: 8,540) | Show on map | Quakes nearby
44 km (27 mi) W of Reno (Nevada) (pop: 241,400) | Show on map | Quakes nearby
49 km (30 mi) WSW of Sun Valley (Washoe County, Nevada) (pop: 19,300) | Show on map | Quakes nearby
49 km (30 mi) W of Sparks (Nevada) (pop: 96,100) | Show on map | Quakes nearby
56 km (35 mi) WSW of Spanish Springs (Washoe County, Nevada) (pop: 15,100) | Show on map | Quakes nearby
65 km (41 mi) NNW of South Lake Tahoe (El Dorado County) (pop: 21,700) | Show on map | Quakes nearby
93 km (58 mi) W of Fernley (Lyon County, Nevada) (pop: 19,400) | Show on map | Quakes nearby
141 km (88 mi) NE of Sacramento (pop: 490,700) | Show on map | Quakes nearby
Weather at epicenter at time of quakeClear Sky 7.5°C (45 F), humidity: 43%, wind: 2 m/s (3 kts) from NNW
Estimated seismic energy released7.1 x 1011 joules (197 megawatt hours, equivalent to 169 tons of TNT) | about seismic energy
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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.
Mag.DepthLocationSource
4.710.1 km19km NW of Truckee, CA, USAUSGS
4.79 kmNORTHERN CALIFORNIA, USAEMSC
4.410 kmNorthern California, USAGFZ

User reports for this quake (1268)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Grass Valley,CA (69.5 km WSW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating : The whole house shook as though a bulldozer was moving us. Items on surfaces made noises but did not fall off. Made the dog go crazy! And it lasted about two minutes. Strong for about 30seconds. Wild! | 8 users found this interesting.  
  • Nevada City, Felt it here shook the whole house.
Grass Valley (72.1 km WSW of epicenter) [Map] / Light shaking (MMI IV) / vibration and rolling / 2-5 s : House shook,windows rattling,slight jumping, dog woke-up | 9 users found this interesting. (reported through our app)  
Cold springs (36.7 km NE of epicenter) [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging / 2-5 s : It said 6.0 on my phone not a 4.2 and the location of it changed as well it was closer to tahoe than what you're showing | 3 users found this interesting. (reported through our app)  
Screenshot... .jpg (public domain)Screenshot... .jpg (public domain)
2000 Larsen Drive Camino, California (84.9 km SSW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 10-15 s : The | 8 users found this interesting.  
Tahoma / Light shaking (MMI IV) / rattling, vibrating / 10-15 s : I have lived in my house since 2008 and have felt a handful of earthquakes. In the past couple of weeks I have felt three of them 3.5, 3.2 & 4.2. I have never experienced them in such close proximity to one another. | 8 users found this interesting.  
Auburn Ca / Weak shaking (MMI III) / single lateral shake : Weak lateral chaking | 7 users found this interesting.  
Spanish springs / Light shaking (MMI IV) / 2-5 s : I was in the tub it felt like my tub lifted then when back down fast. I almost came out of my skin lmao | 4 users found this interesting.  
Clio, CA (37.9 km NNW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s : Mild shaking and no apparent damage to home/structure. Heard that there was a 6.0 earthquake about 43 miles from our home | 3 users found this interesting.  
Davis (162 km SW of epicenter) [Map] / Weak shaking (MMI III) : My couch just moved and I'm sitting on it in an upstairs apartment!! | 4 users found this interesting.  
Samantha Vaughn. Are home, Fernley, NV (92.7 km E of epicenter) [Map] / Very weak shaking (MMI II) / single vertical bump / very short : Very,very mild bump, felt while sitting on couch, felt mainly in lower back!! California native so I guess I noticed it even though it wasn't a big shake!! | 2 users found this interesting.  
SPARKS nv (51.1 km ENE of epicenter) [Map] / Light shaking (MMI IV) / simple rolling (tilting sideways along one direction) / 5-10 s : Sitting on the couch it was like three distinct episodes of something moving under me. Hanging lamps swirling heavily for several minutes | 2 users found this interesting.  
pollock pines CA (82.7 km SSW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 10-15 s : light shaking and could see objects swinging, shaking was weak enough that it was hard to tell when it stopped. felt like the ground was shaking quickly side to side | 2 users found this interesting.  
Reno, NV / Very weak shaking (MMI II) / rattling, vibrating / 2-5 s : I sort of heard it first, like the wind hitting the house but different. It is very windy tonight. Then I felt a shake, pause, then a longer shake, like 3 shakes. My dog growled at it and I told her it was ok and that it was over. | 4 users found this interesting.  
Sparks Nevada (53.8 km ENE of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / 1-2 s : There is a lot of wind here now, so I particularly strong gust was coming since I heard a bit of creaking a second before there was a little sharp sway of the ground that rattled dishes and triggered a louder | 4 users found this interesting.  
Marysville, ca 95901 Hallwood (107.1 km WSW of epicenter) [Map] / Weak shaking (MMI III) / complex motion difficult to describe / 20-30 s : It felt almost like a rolling wave of an ocean and fast | 4 users found this interesting.  
Donner Lake / Moderate shaking (MMI V) / 10-15 s : Heard and felt two loud jolts, bangs, groaning, house shaking glass vibrating, animals alarmed. | 4 users found this interesting.  
Verdi Nv / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s : Definitely felt the shaking sideways. I used to live in CA so used to them, but this one definitely was strong enough and long enough I stopped waiting for it to subside. | 2 users found this interesting.  
Placerville, CA / Light shaking (MMI IV) / rattling, vibrating / 10-15 s : Initial shock/jolt, followed by slight shaking which increased in intensity for several seconds, then subsided. | 2 users found this interesting.  
Home at east end of Donner Lake (15.9 km SSE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : Heard it outside coming from SE, then rolled thru the house with shaking towards NW. My response was "Woah" | One user found this interesting.  
132 km SW of epicenter [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s : I was laying in bed and i felt my bed and body move side to side. I looked at my blinds and they were moving also. | One user found this interesting.  
Grass Valley, CA / Light shaking (MMI IV) / single vertical bump / very short : The house shook slightly and it startled me enough so that my heart dropped to my stomach. | 3 users found this interesting.  
Bedroom / Light shaking (MMI IV) / single vertical bump / very short : It felt like a semi truck hit our house! Nothing fell or broke that we know of. | 3 users found this interesting.  
Oroville, Ca / Weak shaking (MMI III) / 2-5 s : My desk chair and computer felt like it moved and I thought I imagined it. Then about 5 minutes later there was a warning message on my phone about an earthquake. This was my first time experiencing an earthquake. | 3 users found this interesting.  
110.2 km NNW of epicenter [Map] / Very weak shaking (MMI II) / single vertical bump / very short : Little shaking with a pretty good bump | 3 users found this interesting.  
Camino, Ca / Very weak shaking (MMI II) / single lateral shake / 1-2 s : 3 quick pressure poundings to my eardrums a pause and then a single bump with an audible deep low soft sound which could be felt through the floor. | 3 users found this interesting.  
Susanville / Weak shaking (MMI III) / single lateral shake / 2-5 s : Home alone sitting quietly in my chair. It is a rocking recliner, but the movement was not back and forth it was side to side like the chair was gently being pushed side to side 3-5 seconds | 3 users found this interesting.  
Reno NV (40.5 km ENE of epicenter) [Map] / Light shaking (MMI IV) / 1-2 s : It was like a jolt as if someone hit the apartment building and then a slight rolling motion for a second or two. | 3 users found this interesting.  
Truckee, CA. Silver Spur Dr (20.9 km SE of epicenter) [Map] / Moderate shaking (MMI V) / vibration and rolling / 10-15 s : Very strong shaking, not just a jolt, but continuing for 10-15 seconds. | 3 users found this interesting.  
Pollock Pines / Light shaking (MMI IV) / 5-10 s : House shook and stopped and shook again. | 3 users found this interesting.  
15742 N Bloomfield Rd, Nevada City / Light shaking (MMI IV) / 5-10 s : A boom, then a rumble, horizontal shaking of structure. We were seated - looked at each other and stayed in place until the shaking stopped. | 3 users found this interesting.  
Carson City, Nevada (56.3 km SE of epicenter) [Map] / Weak shaking (MMI III) / 1-2 s : The shaking wasn't bad. It did however wake me up. | 3 users found this interesting. (reported through our app)  
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