QuakeIndex

Earthquake · reviewed by a seismologist

M 4.2mw

Earthquake near Dollar Point, CA

No earthquake was likely felt in Dollar Point in the 24 hours to 5:57 am PST (13:57 UTC). The last one was M 1.7, 3 km (2 mi) S, at 4:21 am PST on 9 November 2026, estimated intensity II (weak) in town. Every earthquake near Dollar Point

This page: a magnitude 4.2 earthquake was recorded 10 km (6 mi) southeast of Dollar Point, CA, at 8:25 am PDT on 28 May 2021 (15:25 UTC), 7.0 km deep. 1,659 people have reported feeling it to USGS.

USGS: 10km SE of Dollar Point, CA

50 km (31 mi) SSW of Reno, NV · 25 km (15 mi) W of Carson, NV

8:25 am PDT, May 28, 2021 · · 7.0 km deep · released about 25 tons of TNT

10 km30 km60 km120 km N Carson City 25 kmDouglas County 44 kmStorey County 56 kmEl Dorado County 58 kmAlpine County 59 kmPlacer County 60 kmSierra County 66 kmNevada County 67 kmLyon County 73 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
8:25 am PDT on 28 May 2021 ()
Where
10 km (6 mi) southeast of Dollar Point, CA · earthquakes near Dollar Point
Magnitude
M 4.2 (mw)
Depth
7.0 km below the surface
Felt
1,659 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Nearest
Carson City, 25 km E
Nearest mapped fault
North Tahoe fault, 2 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1643 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

At this magnitude and depth, people at rest would likely notice it out to about 108 km (67 mi) from the epicentre. In Dollar Point, 10 km away, the estimate is intensity IV (light). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Likely felt in: Sunnyside-Tahoe City 12 km, intensity IV · Tahoe Vista 13 km, intensity IV · South Lake Tahoe 21 km, intensity III · Carson City 23 km, intensity III · Truckee 26 km, intensity III · Gardnerville Ranchos 36 km, intensity III · Reno 49 km, intensity III. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 25 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 6,700× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 300× the energy of this one
  3. Magna, Utah 2020 M 5.7 210× the energy of this one
  4. This earthquake M 4.2 about 25 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 53× more

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

For this area

The largest earthquake within 50 km since 2016 was M 4.7 on 2021-05-07 — about 5.6 times the energy of this one.

Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.1 4 km S of Carter Springs, Nevada · 47 km SE of this epicentre
  2. 6.0 Near Reno, Nevada · 46 km NNE of this epicentre
  3. 6.0 6 km WNW of Verdi, California · 48 km N of this epicentre
  4. 5.9 9 km NW of Truckee, California · 36 km NNW of this epicentre
  5. 5.3 11 km N of Soda Springs, California · 47 km NW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 39.1222, -120.0287. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Carson City, NV 25 km (15 mi) E earthquakes near Carson City
Douglas County, NV 44 km (27 mi) ESE earthquakes near Douglas County
Storey County, NV 56 km (35 mi) NE earthquakes near Storey County
El Dorado County, CA 58 km (36 mi) SW earthquakes near El Dorado County
Alpine County, CA 59 km (37 mi) SSE earthquakes near Alpine County
Placer County, CA 60 km (37 mi) W earthquakes near Placer County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

51 earthquakes have been recorded within 50 km since this one.

  1. 1.8 4km SW of Tahoe Vista, CA
  2. 2.0 4 km N of Carter Springs, Nevada
  3. 1.6 9 km E of Carson City, Nevada
  4. 1.7 7 km ENE of Floriston, California
  5. 1.6 6 km ENE of Floriston, California
  6. 1.6 4 km N of Carter Springs, Nevada
  7. 1.6 5 km SW of Dayton, Nevada
  8. 2.1 6km N of Tahoe Vista, CA
  9. 2.1 7 km ENE of Floriston, California
  10. 1.5 7 km W of Mesa Vista, California
  11. 1.5 7 km ENE of Floriston, California
  12. 1.9 4 km N of Carter Springs, Nevada
  13. 1.9 4 km N of Carter Springs, Nevada
  14. 1.8 5 km SSW of Dayton, Nevada
  15. 1.9 4 km S of Virginia City, Nevada

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.