QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

3km NE of Greenville, CA

· -2.0 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 20 kmLassen County 68 kmSierra County 73 kmButte County 79 kmNevada County 96 kmYuba County 105 kmTehama County 111 kmShasta County 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 1.8 (md)
Depth
-2.0 km below the surface
Felt
no reports yet
Nearest
Plumas County, 20 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2725 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× the energy of this one
  4. This earthquake M 1.8 about 16 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 40.1542, -120.9272. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 20 km (12 mi) NNW of here earthquakes near Plumas County
Lassen County, CA 68 km (42 mi) SSW of here earthquakes near Lassen County
Sierra County, CA 73 km (45 mi) NNW of here earthquakes near Sierra County
Butte County, CA 79 km (49 mi) NE of here earthquakes near Butte County
Nevada County, CA 96 km (60 mi) N of here earthquakes near Nevada County
Yuba County, CA 105 km (65 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

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

  1. 1.9 10km N of Spring Garden, CA
  2. 2.3 5km NNE of Little Grass Valley, CA
  3. 2.1 9km NW of Caribou, CA
  4. 2.1 6km S of Bucks Lake, CA
  5. 2.8 8km WNW of Lake Davis, CA
  6. 1.8 15km WSW of Chester, CA
  7. 1.5 10km WSW of Chester, CA
  8. 2.0 2km W of Almanor, CA
  9. 2.1 3km WSW of Almanor, CA
  10. 1.5 3km ESE of Canyondam, CA
  11. 2.0 3km W of Hamilton Branch, CA
  12. 1.8 5km ESE of Taylorsville, CA
  13. 1.8 5km ESE of Taylorsville, CA
  14. 1.6 6 km S of Taylorsville, California
  15. 1.9 4km NNW of Almanor, 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.