QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

4km NE of Greenhorn, CA

· 0.1 km deep · released about 200 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 12 kmSierra County 42 kmNevada County 70 kmButte County 81 kmLassen County 88 kmYuba County 91 kmPlacer County 96 kmStorey County 116 kmCarson City 120 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
0.1 km below the surface
Felt
5 reports · strongest reported intensity III
Nearest
Plumas County, 12 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2045 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 5 people have reported feeling it to USGS.

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 39.9280, -120.7152. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 12 km (7 mi) SE of here earthquakes near Plumas County
Sierra County, CA 42 km (26 mi) NNW of here earthquakes near Sierra County
Nevada County, CA 70 km (44 mi) N of here earthquakes near Nevada County
Butte County, CA 81 km (51 mi) ENE of here earthquakes near Butte County
Lassen County, CA 88 km (55 mi) S of here earthquakes near Lassen County
Yuba County, CA 91 km (56 mi) NE of here earthquakes near Yuba County

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

Aftershocks so far

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

  1. 2.1 4km SE of Taylorsville, CA
  2. 2.8 11km NNE of Lake Davis, CA
  3. 1.6 3km S of East Shore, CA
  4. 2.1 7km N of Greenhorn, CA
  5. 2.1 1km WNW of Lake Davis, CA
  6. 1.5 6 km SSE of Quincy, California
  7. 2.2 6km SSE of Quincy, CA
  8. 1.5 4km S of Canyondam, CA
  9. 1.5 1km WSW of Canyondam, CA
  10. 2.1 4km SSW of East Shore, CA
  11. 2.3 2km N of Canyondam, CA
  12. 1.8 0 km S of Lake Davis, California
  13. 1.6 3km ENE of Prattville, CA
  14. 1.7 4km NNE of Canyondam, CA
  15. 2.6 0km W of Lake Davis, 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 790 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.