QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

5km NNE of East Quincy, CA

· 3.3 km deep · released about 180 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 5 kmSierra County 53 kmButte County 71 kmNevada County 75 kmLassen County 85 kmYuba County 88 kmPlacer County 102 kmTehama County 117 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 2.5 (md)
Depth
3.3 km below the surface
Felt
no reports yet
Nearest
Plumas County, 5 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2031 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 180 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 86,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 61,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.4× the energy of this one
  4. This earthquake M 2.5 about 180 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 39.9712, -120.8745. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 5 km (3 mi) WSW of here earthquakes near Plumas County
Sierra County, CA 53 km (33 mi) NW of here earthquakes near Sierra County
Butte County, CA 71 km (44 mi) ENE of here earthquakes near Butte County
Nevada County, CA 75 km (47 mi) N of here earthquakes near Nevada County
Lassen County, CA 85 km (53 mi) SSW of here earthquakes near Lassen County
Yuba County, CA 88 km (55 mi) NNE of here earthquakes near Yuba County

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

Aftershocks so far

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

  1. 1.5 6 km SSE of Quincy, California
  2. 2.2 6km SSE of Quincy, CA
  3. 1.5 4km S of Canyondam, CA
  4. 2.1 10km W of Almanor, CA
  5. 2.1 11km W of Almanor, CA
  6. 1.5 14km WSW of Almanor, CA
  7. 1.6 13km SW of Almanor, CA
  8. 1.5 1km WSW of Canyondam, CA
  9. 2.1 4km SSW of East Shore, CA
  10. 2.3 2km N of Canyondam, CA
  11. 1.8 0 km S of Lake Davis, California
  12. 1.6 3km ENE of Prattville, CA
  13. 1.7 4km NNE of Canyondam, CA
  14. 2.6 0km W of Lake Davis, CA
  15. 1.6 7 km ENE of Cromberg, California

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.