QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

16 km S of Round Mountain, CA

· 15 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 17 kmTehama County 66 kmTrinity County 103 kmLassen County 107 kmButte County 113 kmSiskiyou County 116 kmPlumas County 117 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
no reports yet
Nearest
Shasta County, 17 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 733 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 5.7 970,000× the energy of this one
  3. Around the size people start to feel M 3.0 86× 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 40.6602, -121.8908. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 17 km (11 mi) SE of here earthquakes near Shasta County
Tehama County, CA 66 km (41 mi) NNE of here earthquakes near Tehama County
Trinity County, CA 103 km (64 mi) E of here earthquakes near Trinity County
Lassen County, CA 107 km (67 mi) W of here earthquakes near Lassen County
Butte County, CA 113 km (70 mi) NNW of here earthquakes near Butte County
Siskiyou County, CA 116 km (72 mi) SSE of here earthquakes near Siskiyou County

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

Aftershocks so far

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

  1. 2.0 7 km ESE of Millville, CA
  2. 1.6 16 km SSW of Round Mountain, CA
  3. 1.9 16 km NE of Mineral, CA
  4. 2.1 16 km W of Manton, CA
  5. 2.2 19 km W of Manton, CA
  6. 2.3 17 km W of Manton, CA
  7. 1.9 16 km SSE of Anderson, CA
  8. 2.0 6 km N of Redding, CA
  9. 1.7 9 km NE of Shasta Lake, CA
  10. 1.5 2 km SE of Mineral, CA
  11. 1.7 13 km NNE of Mineral, CA
  12. 1.6 21 km SSE of Burney, CA
  13. 1.7 9 km N of Shingletown, CA
  14. 1.9 6 km WNW of Manton, CA
  15. 1.7 9 km NE of Shasta Lake, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.0 on 2023-09-08 — it released about 83,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.