QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

14 km SW of Loyalton, CA

· 10 km deep · released about 750 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sierra County 19 kmNevada County 50 kmPlumas County 65 kmCarson City 66 kmPlacer County 66 kmStorey County 68 kmEl Dorado County 89 kmDouglas County 95 kmYuba 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 2.9 (ml)
Depth
10 km below the surface
Felt
7 reports · strongest reported intensity III
Nearest
Sierra County, 19 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 388 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 7 people have reported feeling it to USGS.

How big was it?

This earthquake released about 750 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 20,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 14,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.3× the energy of this one
  4. This earthquake M 2.9 about 750 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 39.5643, -120.3047. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sierra County, CA 19 km (12 mi) E of here earthquakes near Sierra County
Nevada County, CA 50 km (31 mi) NE of here earthquakes near Nevada County
Plumas County, CA 65 km (40 mi) SE of here earthquakes near Plumas County
Carson City, NV 66 km (41 mi) NW of here earthquakes near Carson City
Placer County, CA 66 km (41 mi) NNE of here earthquakes near Placer County
Storey County, NV 68 km (42 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

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

  1. 2.1 8 km NE of Lake Davis, CA
  2. 1.8 8 km NE of Lake Davis, CA
  3. 2.0 8 km NE of Lake Davis, CA
  4. 2.1 7 km NE of Lake Davis, CA
  5. 2.1 7 km NE of Lake Davis, CA
  6. 2.0 7 km NE of Lake Davis, CA
  7. 2.5 8 km NE of Lake Davis, CA
  8. 1.9 8 km NE of Lake Davis, CA
  9. 2.0 19 km S of Johnsville, CA
  10. 1.6 4 km ENE of Dollar Point, CA
  11. 1.9 12 km SSE of Mogul, Nevada
  12. 1.6 12 km SSE of Mogul, Nevada
  13. 2.2 13 km NE of Lake Davis, CA
  14. 2.4 6 km SW of Cold Springs, NV
  15. 2.4 5 km NW of Johnsville, 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 4.7 on 2021-05-07 — it released about 380 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.