QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

9km NNW of Loyalton, CA

· 8.3 km deep · released about 5.9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sierra County 27 kmPlumas County 52 kmNevada County 65 kmStorey County 75 kmCarson City 81 kmPlacer County 85 kmYuba County 104 kmEl Dorado County 109 kmLassen County 111 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 1.5 (md)
Depth
8.3 km below the surface
Felt
no reports yet
Nearest
Sierra County, 27 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3182 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 5.9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 160× the energy of this one
  4. This earthquake M 1.5 about 5.9 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 39.7502, -120.2978. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sierra County, CA 27 km (17 mi) NE of here earthquakes near Sierra County
Plumas County, CA 52 km (33 mi) ESE of here earthquakes near Plumas County
Nevada County, CA 65 km (40 mi) NE of here earthquakes near Nevada County
Storey County, NV 75 km (46 mi) WNW of here earthquakes near Storey County
Carson City, NV 81 km (51 mi) NW of here earthquakes near Carson City
Placer County, CA 85 km (53 mi) NNE of here earthquakes near Placer County

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

Aftershocks so far

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

  1. 3.1 4 km ENE of Floriston, California
  2. 1.8 5km SSW of Cromberg, CA
  3. 1.8 10km NNE of Lake Davis, CA
  4. 1.6 4km WSW of Johnsville, CA
  5. 2.0 3km WSW of Cromberg, CA
  6. 1.5 18km SSW of Whitehawk, CA
  7. 1.6 2km SW of Cromberg, CA
  8. 2.1 5km NNE of Lake Davis, CA
  9. 1.9 5km NNE of Lake Davis, CA
  10. 2.0 9km NNW of Loyalton, CA
  11. 2.3 3km ENE of Greenhorn, CA
  12. 1.7 18km NNE of Chilcoot-Vinton, CA
  13. 2.1 12 km E of Chilcoot-Vinton, California
  14. 1.8 10km NNE of Greenhorn, CA
  15. 2.5 17km NNE of Chilcoot-Vinton, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.5 on 2016-08-04 — it released about 27,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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