Moderate mag. 4.2 earthquake - Mono County, 37 mi southeast of South Lake Tahoe, El Dorado County, California, USA, on 8 Jul 4:58 pm (GMT -7) -

This quake was likely an aftershock of the 5.2 quake Mono County, 38 mi southeast of South Lake Tahoe, El Dorado County, California, USA, July, 8 2021 22:50 GMT, which had occurred 1 hour and 9 minutes earlier.
Moderate mag. 4.2 earthquake - Mono County, 37 mi southeast of South Lake Tahoe, El Dorado County, California, USA, on 8 Jul 4:58 pm (GMT -7)

Moderate magnitude 4.2 earthquake at 6 km depth

9 Jul 00:00 UTC: First to report: USGS after 1 minute.
9 Jul 00:03: Magnitude recalculated from 4.0 to 4.5. Hypocenter depth recalculated from 8.0 to 3.3 km (from 5 to 2.1 mi). Epicenter location corrected by 4.4 km (2.7 mi) towards E.
9 Jul 01:26: Magnitude recalculated from 4.5 to 4.2.
9 Jul 07:52: Hypocenter depth recalculated from 3.3 to 5.8 km (from 2.1 to 3.6 mi).
Update Fri, 9 Jul 2021, 00:06
Moderate earthquake of magnitude 4.5 just reported 37 miles southeast of South Lake Tahoe, California, United States
4.5 quake 8 Jul 4:58 pm (GMT -7)
4.5 quake 8 Jul 4:58 pm (GMT -7)
A very shallow magnitude 4.5 earthquake was reported in the afternoon near South Lake Tahoe, El Dorado County, California, USA.
According to the United States Geological Survey, the quake hit on Thursday 8 July 2021 at 4:58 pm local time at a very shallow depth of 2.1 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 identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 4.2.
Based on the preliminary seismic data, the quake should have been widely felt by almost everyone in the area of the epicenter. It might have caused light to moderate damage.
Moderate shaking probably occurred in Coleville (pop. 500) located 2 miles from the epicenter.
Weak shaking might have been felt in Topaz Ranch Estates (pop. 1,500) located 14 miles from the epicenter, Smith Valley (pop. 1,600) 20 miles away, Gardnerville Ranchos (pop. 11,300) 27 miles away, Gardnerville (pop. 5,700) 31 miles away, Gardnerville (pop. 5,700) 31 miles away, Johnson Lane (pop. 6,500) 37 miles away, and South Lake Tahoe (pop. 21,700) 37 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.
Download the Volcanoes & Earthquakes app and get one of the fastest seismic alerts online:
Android | iOS

Earthquake data

Date & time: Jul 8, 2021 23:58:53 UTC -
Local time at epicenter: 8 Jul 4:58 pm (GMT -7)
Magnitude: 4.2
Depth: 5.8 km
Epicenter latitude / longitude: 38.537°N / 119.524°W (Mono, California, United States)
Antipode: 38.537°S / 60.476°E
Nearest volcano: Mono Lake (76 km / 47 mi)
Nearby towns and cities:
4 km (2 mi) SSW of Coleville (pop: 495) --> See nearby quakes!
22 km (14 mi) S of Topaz Ranch Estates (Nevada) (pop: 1,500) --> See nearby quakes!
32 km (20 mi) SSW of Smith Valley (Nevada) (pop: 1,600) --> See nearby quakes!
43 km (27 mi) SSE of Gardnerville Ranchos (Nevada) (pop: 11,300) --> See nearby quakes!
59 km (37 mi) SSW of Greenfield (Nevada) (pop: 3,060) --> See nearby quakes!
59 km (37 mi) SSE of Johnson Lane (Douglas County, Nevada) (pop: 6,490) --> See nearby quakes!
59 km (37 mi) SE of South Lake Tahoe (El Dorado County) (pop: 21,700) --> See nearby quakes!
113 km (70 mi) S of Sparks (Nevada) (pop: 96,100) --> See nearby quakes!
113 km (70 mi) SSE of Reno (Nevada) (pop: 241,400) --> See nearby quakes!
171 km (107 mi) E of Sacramento (pop: 490,700) --> See nearby quakes!
Weather at epicenter at time of quake:
Broken Clouds 27.2°C (81 F), humidity: 20%, wind: 7 m/s (14 kts) from SW
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.3 x 1011 joules (35 megawatt hours, equivalent to 30.1 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!
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.
4.25.8 km29km SE of Markleeville, CAUSGS

User reports for this quake (7)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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!
Davis, ca (194.9 km W of epicenter) [Map] / Very weak shaking (MMI II) / vibration and rolling / 1-2 s
LAS VEGAS (454.7 km SE of epicenter) [Map] / not felt (reported through our app)
Sun valley Nv (120.5 km N of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating : Light shaking (reported through our app)  
Elverta / Weak shaking (MMI III) / 2-5 s
Lemoore (255.5 km S of epicenter) [Map] / not felt (reported through our app)
MARIPOSA (117.6 km SSW of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 1-2 s : Rumbling and tremors (reported through our app)  
Twain Harte (83.3 km SW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 1-2 s : Yes. Series of them back to back (reported through our app)  
  • I would rather see these smaller ones here inland and the larger trigger to the whats now settlingback in place then the onther way around
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:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Detailed quake stats
  • Additional seismic data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Copyrights: VolcanoDiscovery and other sources as noted.
Use of 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.