QuakeIndex

Earthquake · automatic estimate, may change

M 2.5md

5 km NW of Johnsville, CA

· -2.0 km deep · released about 200 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 23 kmSierra County 31 kmNevada County 56 kmButte County 75 kmYuba County 78 kmPlacer County 82 kmLassen County 103 kmCarson City 111 kmStorey County 112 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
-2.0 km below the surface
Felt
no reports yet
Nearest
Plumas County, 23 km NNW
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 660 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 200 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 75,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 53,000× the energy of this one
  3. Around the size people start to feel M 3.0 4.7× the energy of this one
  4. This earthquake M 2.5 about 200 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 39.7962, -120.7422. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 23 km (14 mi) SSE of here earthquakes near Plumas County
Sierra County, CA 31 km (19 mi) NW of here earthquakes near Sierra County
Nevada County, CA 56 km (34 mi) N of here earthquakes near Nevada County
Butte County, CA 75 km (47 mi) ENE of here earthquakes near Butte County
Yuba County, CA 78 km (48 mi) NE of here earthquakes near Yuba County
Placer County, CA 82 km (51 mi) N of here earthquakes near Placer County

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

Aftershocks so far

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

  1. 1.8 11 km N of Lake Davis, CA
  2. 1.7 4 km SW of Greenville, California
  3. 2.1 2 km SSW of Plumas Eureka, CA
  4. 1.6 5 km E of East Quincy, California
  5. 2.0 7 km S of Canyondam, CA
  6. 2.1 1 km SSE of Belden, CA
  7. 2.2 3 km SSE of Canyondam, CA
  8. 2.1 8 km NE of Cromberg, CA
  9. 1.5 2 km E of Portola, California
  10. 2.4 20 km SSW of Loyalton, CA
  11. 2.3 5 km WSW of Johnsville, CA
  12. 2.2 11 km NE of Cromberg, CA
  13. 2.9 14 km SW of Loyalton, CA
  14. 2.3 14 km SW of Loyalton, CA
  15. 2.2 13 km SSW 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.