QuakeIndex

Earthquake · automatic estimate, may change

M 3.4ml

9 km W of Manton, CA

· 10 km deep · released about 1.7 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 38 kmShasta County 39 kmButte County 89 kmGlenn County 97 kmTrinity County 100 kmPlumas County 108 kmLassen County 119 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 3.4 (ml)
Depth
10 km below the surface
Felt
19 reports · strongest reported intensity IV
Nearest
Tehama County, 38 km SW
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 282 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 19 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 100,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,200× the energy of this one
  4. This earthquake M 3.4 about 1.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.5× more

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 40.4095, -121.9738. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 38 km (24 mi) NE of here earthquakes near Tehama County
Shasta County, CA 39 km (25 mi) S of here earthquakes near Shasta County
Butte County, CA 89 km (55 mi) NNW of here earthquakes near Butte County
Glenn County, CA 97 km (60 mi) NNE of here earthquakes near Glenn County
Trinity County, CA 100 km (62 mi) ESE of here earthquakes near Trinity County
Plumas County, CA 108 km (67 mi) WNW of here earthquakes near Plumas County

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

Aftershocks so far

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

  1. 1.9 5 km WNW of Shasta Lake, CA
  2. 1.9 4 km WSW of Shasta Lake, CA
  3. 1.9 10 km SW of Manton, CA
  4. 1.6 13 km NE of Mineral, CA
  5. 1.6 3 km NE of Mineral, CA
  6. 1.8 14 km NNW of Viola, CA
  7. 2.0 4 km NNW of Millville, CA
  8. 1.8 15 km W of Round Mountain, CA
  9. 1.9 2 km N of Millville, CA
  10. 2.1 4 km E of Millville, CA
  11. 1.6 10 km SW of Manton, CA
  12. 1.8 8 km S of Mineral, CA
  13. 1.9 1 km S of Shasta Lake, CA
  14. 1.8 9 km NE of Shasta Lake, CA
  15. 1.8 16 km S of Mineral, 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

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