QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

11km WNW of Big Bend, CA

· 15 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 35 kmSiskiyou County 72 kmTrinity County 104 kmTehama County 107 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 1.6 (md)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Shasta County, 35 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2245 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 6.4 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 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 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 41.0732, -122.0177. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 35 km (22 mi) N of here earthquakes near Shasta County
Siskiyou County, CA 72 km (45 mi) SE of here earthquakes near Siskiyou County
Trinity County, CA 104 km (64 mi) ENE of here earthquakes near Trinity County
Tehama County, CA 107 km (66 mi) N of here earthquakes near Tehama County
Modoc County, CA 123 km (76 mi) WSW of here earthquakes near Modoc County
Lassen County, CA 124 km (77 mi) WNW of here earthquakes near Lassen County

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

Aftershocks so far

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

  1. 1.9 16km NW of Big Bend, CA
  2. 1.7 12km W of Fall River Mills, CA
  3. 1.9 8km NNE of McCloud, CA
  4. 1.8 21km ENE of McCloud, CA
  5. 1.6 15km SSE of McCloud, CA
  6. 2.2 21km ENE of McCloud, CA
  7. 1.8 13km ENE of Carrick, CA
  8. 1.6 10km WSW of Round Mountain, CA
  9. 1.9 19km NW of McArthur, CA
  10. 2.1 12km NNE of Shasta Lake, CA
  11. 1.8 9km NE of Shasta Lake, CA
  12. 2.0 18km WNW of Round Mountain, CA
  13. 2.9 25km N of Shasta Lake, CA
  14. 1.7 29km N of Shasta Lake, CA
  15. 1.7 10km 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.

On USGS

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