QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

17km WNW of Round Mountain, CA

· 17 km deep · released about 9.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 14 kmTehama County 82 kmTrinity County 86 kmSiskiyou County 87 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
17 km below the surface
Felt
no reports yet
Nearest
Shasta County, 14 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2748 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 9.6 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 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 99× the energy of this one
  4. This earthquake M 1.7 about 9.6 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 40.8637, -122.1298. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 14 km (8 mi) NNW of here earthquakes near Shasta County
Tehama County, CA 82 km (51 mi) N of here earthquakes near Tehama County
Trinity County, CA 86 km (54 mi) ENE of here earthquakes near Trinity County
Siskiyou County, CA 87 km (54 mi) SSE of here earthquakes near Siskiyou County
Modoc County, CA 143 km (89 mi) SW of here earthquakes near Modoc County
Plumas County, CA 147 km (91 mi) NW of here earthquakes near Plumas 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. 1.9 16km NNE of Bella Vista, CA
  2. 1.7 11km NE of Shasta Lake, CA
  3. 1.6 11km WNW of Burney, CA
  4. 1.6 10km WNW of Burney, CA
  5. 1.7 2km NW of Shasta Lake, CA
  6. 1.7 6km NE of Shasta Lake, CA
  7. 2.2 16km SE of McCloud, CA
  8. 1.5 9km NNE of Shasta Lake, CA
  9. 1.7 12km NE of Shingletown, CA
  10. 1.6 10km SSE of Burney, CA
  11. 1.7 8km NW of Montgomery Creek, CA
  12. 1.9 4km N of McCloud, CA
  13. 1.9 8km SW of Dunsmuir, CA
  14. 1.6 3km SW of Shasta Lake, CA
  15. 1.6 17km NNW of Shingletown, 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.