QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

22km SSW of Whitehawk, CA

· 8.4 km deep · released about 23 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sierra County 10 kmNevada County 29 kmPlacer County 53 kmPlumas County 54 kmYuba County 68 kmEl Dorado County 83 kmButte County 85 kmCarson City 86 kmStorey County 95 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
Magnitude
M 1.9 (md)
Depth
8.4 km below the surface
Felt
1 report
Nearest
Sierra County, 10 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1970 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 23 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 660,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 470,000× the energy of this one
  3. Around the size people start to feel M 3.0 42× the energy of this one
  4. This earthquake M 1.9 about 23 lb of TNT

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.

Where

Epicentre 39.5300, -120.6225. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sierra County, CA 10 km (6 mi) WSW of here earthquakes near Sierra County
Nevada County, CA 29 km (18 mi) NNE of here earthquakes near Nevada County
Placer County, CA 53 km (33 mi) N of here earthquakes near Placer County
Plumas County, CA 54 km (34 mi) SSE of here earthquakes near Plumas County
Yuba County, CA 68 km (43 mi) ENE of here earthquakes near Yuba County
El Dorado County, CA 83 km (52 mi) N of here earthquakes near El Dorado County

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

Aftershocks so far

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

  1. 2.1 16km WSW of Loyalton, CA
  2. 2.2 26km W of Sunnyside-Tahoe City, CA
  3. 2.1 24km SSW of Loyalton, CA
  4. 2.2 10km N of Truckee, CA
  5. 2.3 10km WNW of Little Grass Valley, CA
  6. 1.5 2 km SE of Spring Garden, California
  7. 1.5 3 km WNW of Sierra City, California
  8. 2.2 9km E of Little Grass Valley, CA
  9. 1.9 4km E of Truckee, CA
  10. 2.7 4km E of Truckee, CA
  11. 2.2 4km E of Truckee, CA
  12. 1.5 1 km ESE of C-Road, California
  13. 2.0 14km SSW of Loyalton, CA
  14. 1.5 3 km SSE of Greenhorn, California
  15. 2.2 3km WSW of Cromberg, CA

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.