QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

12km W of Round Mountain, CA

· 10 km deep · released about 5.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 5 kmTehama County 76 kmTrinity County 89 kmSiskiyou County 96 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 1.5 (md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Shasta County, 5 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1655 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 5.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.7 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 40.7977, -122.0812. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 5 km (3 mi) NW of here earthquakes near Shasta County
Tehama County, CA 76 km (47 mi) N of here earthquakes near Tehama County
Trinity County, CA 89 km (55 mi) E of here earthquakes near Trinity County
Siskiyou County, CA 96 km (59 mi) SSE of here earthquakes near Siskiyou County
Plumas County, CA 139 km (86 mi) NW of here earthquakes near Plumas County
Modoc County, CA 144 km (90 mi) SW of here earthquakes near Modoc County

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

Aftershocks so far

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

  1. 1.7 11km NW of Shasta Lake, CA
  2. 1.6 2km N of Bella Vista, CA
  3. 1.6 18km NNE of Bella Vista, CA
  4. 2.2 18km NNE of Bella Vista, CA
  5. 1.8 5km NNE of Shasta, CA
  6. 1.7 4km N of Viola, CA
  7. 1.8 18km NW of Viola, CA
  8. 1.6 8km NNW of Bella Vista, CA
  9. 1.9 16km ESE of McCloud, CA
  10. 1.6 9km NE of Shasta Lake, CA
  11. 1.9 10km NW of Burney, CA
  12. 1.5 10km NW of Burney, CA
  13. 1.7 11km SE of Millville, CA
  14. 1.8 22km N of Big Bend, CA
  15. 1.8 7km NNW of Bella Vista, 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.