QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

2 km ENE of East Quincy, California

· 15 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 7 kmSierra County 50 kmButte County 70 kmNevada County 72 kmYuba County 85 kmLassen County 89 kmPlacer County 99 kmTehama County 118 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 1.7 (ml)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Plumas County, 7 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2007 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 39.9410, -120.8676. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 7 km (4 mi) SSW of here earthquakes near Plumas County
Sierra County, CA 50 km (31 mi) NW of here earthquakes near Sierra County
Butte County, CA 70 km (43 mi) ENE of here earthquakes near Butte County
Nevada County, CA 72 km (45 mi) N of here earthquakes near Nevada County
Yuba County, CA 85 km (53 mi) NNE of here earthquakes near Yuba County
Lassen County, CA 89 km (55 mi) SSW of here earthquakes near Lassen 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. 2.8 2km NE of Almanor, CA
  2. 2.2 3km WSW of Cromberg, CA
  3. 2.7 5km ENE of East Quincy, CA
  4. 2.1 6km SW of Cromberg, CA
  5. 1.9 13km WSW of Almanor, CA
  6. 2.2 4km ENE of Prattville, CA
  7. 2.1 4km SE of Taylorsville, CA
  8. 2.8 11km NNE of Lake Davis, CA
  9. 1.6 3km S of East Shore, CA
  10. 1.9 9km W of Caribou, CA
  11. 2.1 7km N of Greenhorn, CA
  12. 1.5 11km SW of Chester, CA
  13. 1.9 4km NNE of Prattville, CA
  14. 2.1 1km WNW of Lake Davis, CA
  15. 1.5 6 km SSE of Quincy, 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.