QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

4km NNW of Canyondam, CA

· 15 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 32 kmLassen County 69 kmButte County 74 kmSierra County 85 kmTehama County 98 kmShasta County 102 kmNevada County 104 kmYuba County 106 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 (md)
Depth
15 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Plumas County, 32 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2921 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 12 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 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 900,000× the energy of this one
  3. Around the size people start to feel M 3.0 80× the energy of this one
  4. This earthquake M 1.7 about 12 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 40.2037, -121.0880. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 32 km (20 mi) NW of here earthquakes near Plumas County
Lassen County, CA 69 km (43 mi) SW of here earthquakes near Lassen County
Butte County, CA 74 km (46 mi) NE of here earthquakes near Butte County
Sierra County, CA 85 km (53 mi) NW of here earthquakes near Sierra County
Tehama County, CA 98 km (61 mi) E of here earthquakes near Tehama County
Shasta County, CA 102 km (63 mi) SE of here earthquakes near Shasta 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. 1.8 4km W of Taylorsville, CA
  2. 1.9 2km WNW of East Shore, CA
  3. 1.8 12km SW of Johnstonville, CA
  4. 1.9 4km SW of East Shore, CA
  5. 1.6 1km SSE of Canyondam, CA
  6. 2.2 5km SE of Taylorsville, CA
  7. 2.2 12km NNE of Little Grass Valley, CA
  8. 2.8 3km SE of Belden, CA
  9. 1.6 14km NNE of Mineral, CA
  10. 1.8 4km ESE of Taylorsville, CA
  11. 1.7 7km WSW of Greenville, CA
  12. 2.6 5km N of Almanor, CA
  13. 1.6 5km SSE of Chester, CA
  14. 2.5 5km SE of Chester, CA
  15. 3.4 5km WNW of Hamilton Branch, 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.