QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

11km NE of Cromberg, CA

· 3.0 km deep · released about 94 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 18 kmSierra County 42 kmNevada County 74 kmLassen County 85 kmButte County 89 kmYuba County 97 kmPlacer County 99 kmStorey County 110 kmCarson City 116 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 2.3 (md)
Depth
3.0 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Plumas County, 18 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2570 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 94 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 160,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 110,000× the energy of this one
  3. Around the size people start to feel M 3.0 10× the energy of this one
  4. This earthquake M 2.3 about 94 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 39.9497, -120.6265. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 18 km (11 mi) ESE of here earthquakes near Plumas County
Sierra County, CA 42 km (26 mi) NNW of here earthquakes near Sierra County
Nevada County, CA 74 km (46 mi) N of here earthquakes near Nevada County
Lassen County, CA 85 km (53 mi) S of here earthquakes near Lassen County
Butte County, CA 89 km (55 mi) ENE of here earthquakes near Butte County
Yuba County, CA 97 km (61 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

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

  1. 1.5 5 km SSW of Sattley, California
  2. 1.8 2km SSW of Canyondam, CA
  3. 1.9 20km SW of Whitehawk, CA
  4. 1.9 3km NNW of Johnsville, CA
  5. 1.6 4km SE of Canyondam, CA
  6. 1.6 4km NE of Canyondam, CA
  7. 1.9 5km NNE of Greenhorn, CA
  8. 1.7 6km NNE of East Quincy, CA
  9. 1.8 7km N of Greenhorn, CA
  10. 1.6 7km NNW of Greenville, CA
  11. 1.5 8km NE of East Shore, CA
  12. 1.5 8km ENE of Hamilton Branch, CA
  13. 1.5 6 km ENE of East Quincy, California
  14. 2.2 14km SW of Whitehawk, CA
  15. 1.6 3km NE of Canyondam, 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 1,700 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.