Quake Info: Moderate Mag. 4.3 Earthquake - 37 mi Southeast of South Lake Tahoe, El Dorado County, California, USA, on 8 Jul 10:10 pm (GMT -7)

Moderate magnitude 4.3 earthquake at 2 km depth

9 Jul 05:12 UTC: First to report: USGS after 2 minutes.
9 Jul 05:14: Magnitude recalculated from 4.5 to 4.7. Hypocenter depth recalculated from 8.0 to 1.7 km (from 5 to 1.1 mi). Epicenter location corrected by 9.2 km (5.7 mi) towards ENE.
9 Jul 05:15: Magnitude recalculated from 4.7 to 4.4.
9 Jul 05:39: Magnitude recalculated from 4.4 to 4.3.

Earthquake details

Date & time	Jul 9, 2021 05:10:35 UTC
Local time at epicenter	8 Jul 10:10 pm (GMT -7)
Status	Confirmed
Magnitude	4.3
Depth	1.7 km
Epicenter latitude / longitude	38.56384°N / 119.4815°W (Mono, California, United States)
Antipode	38.564°S / 60.519°E
Shaking intensity	Light shaking
Felt	49 reports
Primary data source	USGS (United States Geological Survey)
Nearest volcano	Mono Lake (76 km / 47 mi)
Nearby towns and cities	2 km (1 mi) E of Coleville (California) (pop: 495) \| Show on map \| Quakes nearby 19 km (12 mi) S of Topaz Ranch Estates (pop: 1,500) \| Show on map \| Quakes nearby 27 km (17 mi) SSW of Smith Valley (pop: 1,600) \| Show on map \| Quakes nearby 43 km (26 mi) SSE of Gardnerville Ranchos (pop: 11,300) \| Show on map \| Quakes nearby 54 km (34 mi) SSW of Yerington (pop: 3,060) \| Show on map \| Quakes nearby 58 km (36 mi) SSE of Johnson Lane (Douglas County) (pop: 6,490) \| Show on map \| Quakes nearby 60 km (37 mi) SE of South Lake Tahoe (El Dorado County, California) (pop: 21,700) \| Show on map \| Quakes nearby 111 km (69 mi) SSE of Sparks (pop: 96,100) \| Show on map \| Quakes nearby 111 km (69 mi) SSE of Reno (pop: 241,400) \| Show on map \| Quakes nearby 175 km (109 mi) E of Sacramento (California) (pop: 490,700) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Clear Sky 19.2°C (66 F), humidity: 40%, wind: 3 m/s (7 kts) from SSW
Estimated seismic energy released	1.8 x 10¹¹ joules (49.4 megawatt hours, equivalent to 42.5 tons of TNT) \| about seismic energy

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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.	Depth	Location	Source
4.3	1.7 km	27km SSW of Smith Valley, NV	USGS
4.5	6 km	CENTRAL CALIFORNIA	EMSC

Most recent quakes Top 20 past 24 hrs Quakes in the US Nevada

Seismograms

Seismic station: Mammoth (MLAC/CI network) | Distance from quake: 118 km / 73 mi | Show on map | Station Info

Seismic station Mammoth: 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. Bandpass filter applied: 0.2-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

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Seismic station Mammoth: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Mammoth: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake, showing horizontal E-W and N-S ground movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Tinemaha (TIN/CI network) | Distance from quake: 201 km / 125 mi | Show on map | Station Info

Seismic station Tinemaha: 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. Bandpass filter applied: 0.2-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station Tinemaha: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Tinemaha: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Marconi Conference Center, Marshall, CA, USA (MCCM/BK network) | Distance from quake: 300 km / 186 mi | Show on map | Station Info

Seismic station Marconi Conference Center, Marshall, 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. Bandpass filter applied: 0.2-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station Marconi Conference Center, Marshall, CA, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Marconi Conference Center, Marshall, CA, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Mount Wilson Obsv (MWC/CI network) | Distance from quake: 499 km / 310 mi | Show on map | Station Info

Seismic station Mount Wilson Obsv: 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. Bandpass filter applied: 0.2-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station Mount Wilson Obsv: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Mount Wilson Obsv: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Hoala (HOA/CC network) | Distance from quake: 882 km / 548 mi | Show on map | Station Info

Seismic station Hoala: 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. Bandpass filter applied: 0.2-5.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station Hoala: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Hoala: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

User reports for this quake (53)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.

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Modesto, Ca (267.7 km S of epicenter) [Map] / Light shaking (MMI IV) / simple rolling (tilting sideways along one direction) / 5-10 s : Actually my cell phone sho | One user found this interesting.

Dairyville ca (284.1 km NW of epicenter) [Map] / not felt : Water in cats bowl started shaking | 2 users found this interesting.

Georgetown, CA / Light shaking (MMI IV) / complex rolling (tilting in multiple directions) / 5-10 s : I was in a parking lot next to my car. Saw car jiggle around an felt ground rumble beneath me. Had to double check my parking break was on for fear car would roll away! | One user found this interesting.

South Lake Tahoe, El Dorado, California (56.9 km NW of epicenter) [Map] / Weak shaking (MMI III) / complex motion difficult to describe / 10-15 s : Laying in bed and it felt like someone was under my bed and the glass on the lamp rattled

SILVER PEAK NV (184.5 km ESE of epicenter) [Map] / not felt (reported through our app)

Roseville, CA (155.6 km W of epicenter) [Map] / Very weak shaking (MMI II) / vibration and rolling / 5-10 s

Gardnerville, Douglas, Nevada (48.4 km NNW of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)

Minden (63.7 km NNW of epicenter) [Map] / Weak shaking (MMI III) / both vertical and horizontal swinging / very short

Coleville, ca (3.1 km NW of epicenter) [Map] / Moderate shaking (MMI V) / 1-2 s (reported through our app)

Pioneer, Amador, California (92.3 km W of epicenter) [Map] / Weak shaking (MMI III)

Home (96.9 km W of epicenter) [Map] / Weak shaking (MMI III) / complex motion difficult to describe / 2-5 s

Smiths (24.7 km NNE of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)

Reno NV (98.4 km NNW of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 2-5 s : On 4th floor of an apartment building. Built up to a few lateral jolts. (reported through our app)

Merced (166.1 km SSW of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / 2-5 s : A little shake

South Lake Tahoe, El Dorado, California (56.9 km NW of epicenter) [Map] / Weak shaking (MMI III) / complex motion difficult to describe / 10-15 s : Laying in bed and it felt like someone was under my bed and the glass on the lamp rattled

Canoga Park, Los Angeles, California (491.5 km S of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)

near Twain Harte, Tuolumne, California (76.8 km SW of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake / 2-5 s (reported through our app)

Elk Grove,ca (171.7 km W of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 2-5 s (reported through our app)

Linden, San Joaquin, California (155.8 km WSW of epicenter) [Map] / Weak shaking (MMI III)

Sacramento Ca (170.9 km W of epicenter) [Map] / Very weak shaking (MMI II) (reported through our app)

Rail Road Flat CA (95.4 km WSW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 s (reported through our app)

Rosemont, Sacramento, California (168 km W of epicenter) [Map] / Very weak shaking (MMI II) / simple rolling (tilting sideways along one direction) / 2-5 s (reported through our app)

Pine Grove (104.1 km W of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s

Kingsbury, Douglas, Nevada (59.8 km NW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s : In bed abs felt bed vibrating sideways

Tracy ca (195.9 km WSW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s

Gardnerville Nevada / Light shaking (MMI IV) / simple rolling (tilting sideways along one direction) / 2-5 s

Reno 89509. Just went to bed falling asleep and th / Moderate shaking (MMI V) / simple rolling (tilting sideways along one direction) / 5-10 s : Not a jolt more of a rolling undulating feeling.

95667 / Weak shaking (MMI III) / single lateral shake / very short

Pittsburg, ca / Very weak shaking (MMI II) / simple rolling (tilting sideways along one direction) / 15-20 s : A gentle rolling that seemed to go on for awhile but was probably 15-20 seconds.

WINTON, CA / Weak shaking (MMI III) / very short : bed shook

Las Vegas / not felt

Earlier earthquakes in the same area

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Most recent quakes Top 20 past 24 hrs Quakes in the US Nevada

Moderate mag. 4.3 earthquake - 37 mi southeast of South Lake Tahoe, El Dorado County, California, USA, on 8 Jul 10:10 pm (GMT -7)

Moderate magnitude 4.3 earthquake at 2 km depth

Earthquake details

Data for the same earthquake reported by different agencies

Seismograms

User reports for this quake (53)

Earlier earthquakes in the same area

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