QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

2 km ESE of Sattley, California

· -1.2 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sierra County 11 kmNevada County 47 kmPlumas County 56 kmPlacer County 66 kmCarson City 75 kmStorey County 77 kmYuba County 89 kmEl Dorado County 92 kmDouglas County 103 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 1.8 (md)
Depth
-1.2 km below the surface
Felt
no reports yet
Nearest
Sierra County, 11 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3270 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× the energy of this one
  4. This earthquake M 1.8 about 15 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 39.6028, -120.3997. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sierra County, CA 11 km (7 mi) ENE of here earthquakes near Sierra County
Nevada County, CA 47 km (29 mi) NE of here earthquakes near Nevada County
Plumas County, CA 56 km (35 mi) SE of here earthquakes near Plumas County
Placer County, CA 66 km (41 mi) NNE of here earthquakes near Placer County
Carson City, NV 75 km (47 mi) NW of here earthquakes near Carson City
Storey County, NV 77 km (48 mi) WNW of here earthquakes near Storey County

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

Aftershocks so far

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

  1. 2.0 8 km N of Incline Village, Nevada
  2. 1.7 Nevada
  3. 2.1 5km NNE of Lake Davis, CA
  4. 1.9 5km NNE of Lake Davis, CA
  5. 2.0 9km NNW of Loyalton, CA
  6. 2.3 3km ENE of Greenhorn, CA
  7. 1.7 18km NNE of Chilcoot-Vinton, CA
  8. 2.6 8 km SE of Floriston, California
  9. 2.1 12 km E of Chilcoot-Vinton, California
  10. 1.8 10km NNE of Greenhorn, CA
  11. 2.5 17km NNE of Chilcoot-Vinton, CA
  12. 2.0 13 km NNE of Soda Springs, California
  13. 2.6 9km NNW of Loyalton, CA
  14. 1.5 5 km SSE of Floriston, California
  15. 1.9 10km NNW of Loyalton, 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.