QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

2km SSW of Shasta Lake, CA

· 19 km deep · released about 18 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 30 kmTehama County 61 kmTrinity County 62 kmSiskiyou County 103 kmGlenn County 118 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 1.9 (md)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Shasta County, 30 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2021 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 18 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 840,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 600,000× the energy of this one
  3. Around the size people start to feel M 3.0 53× the energy of this one
  4. This earthquake M 1.9 about 18 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 40.6658, -122.3775. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 30 km (19 mi) WSW of here earthquakes near Shasta County
Tehama County, CA 61 km (38 mi) NNW of here earthquakes near Tehama County
Trinity County, CA 62 km (39 mi) E of here earthquakes near Trinity County
Siskiyou County, CA 103 km (64 mi) S of here earthquakes near Siskiyou County
Glenn County, CA 118 km (73 mi) N of here earthquakes near Glenn County
Butte County, CA 129 km (80 mi) NNW of here earthquakes near Butte County

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

Aftershocks so far

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

  1. 1.8 23km N of Shasta Lake, CA
  2. 1.7 1km NE of Shasta Lake, CA
  3. 1.7 11km NNE of Bella Vista, CA
  4. 2.3 6km ENE of Shasta, CA
  5. 1.6 9km NE of Shasta Lake, CA
  6. 1.6 2km WNW of Shasta Lake, CA
  7. 1.8 12km NE of Bella Vista, CA
  8. 2.5 11km NNE of Bella Vista, CA
  9. 2.2 6km NW of Redding, CA
  10. 1.6 16km N of Shingletown, CA
  11. 1.7 4km ENE of Shasta, CA
  12. 2.5 4km ENE of Shasta, CA
  13. 1.8 4km E of Shasta, CA
  14. 1.7 4km NW of Bella Vista, CA
  15. 2.1 2km NW 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.