QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

6 km NE of Graniteville, California

· 5.4 km deep · released about 8.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sierra County 18 kmNevada County 22 kmPlacer County 47 kmPlumas County 58 kmYuba County 61 kmEl Dorado County 79 kmButte County 80 kmCarson City 89 kmSutter County 100 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 1.6 (md)
Depth
5.4 km below the surface
Felt
no reports yet
Nearest
Sierra County, 18 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3390 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 8.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.7 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 39.4832, -120.6957. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sierra County, CA 18 km (11 mi) SW of here earthquakes near Sierra County
Nevada County, CA 22 km (13 mi) NNE of here earthquakes near Nevada County
Placer County, CA 47 km (29 mi) N of here earthquakes near Placer County
Plumas County, CA 58 km (36 mi) S of here earthquakes near Plumas County
Yuba County, CA 61 km (38 mi) ENE of here earthquakes near Yuba County
El Dorado County, CA 79 km (49 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

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

  1. 1.9 12km S of Johnsville, CA
  2. 2.3 10km NNW of Loyalton, CA
  3. 2.0 21km NW of Truckee, CA
  4. 1.6 6km NNE of Plumas Eureka, CA
  5. 1.6 3km NNW of Plumas Eureka, CA
  6. 1.7 4km NNW of Plumas Eureka, CA
  7. 2.5 4km NNW of Plumas Eureka, CA
  8. 1.8 1km NNW of Spring Garden, CA
  9. 1.7 18km SSW of Whitehawk, CA
  10. 1.5 9km NNW of Loyalton, CA
  11. 1.7 18km SSW of Whitehawk, CA
  12. 1.7 17km SW of Whitehawk, CA
  13. 1.6 18km SSW of Whitehawk, CA
  14. 1.6 5km N of Plumas Eureka, CA
  15. 1.7 5km SE 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.