QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

10km WSW of Round Mountain, CA

· 12 km deep · released about 9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 2 kmTehama County 74 kmTrinity County 90 kmSiskiyou County 98 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
12 km below the surface
Felt
no reports yet
Nearest
Shasta County, 2 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1916 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 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 9 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 40.7795, -122.0592. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 2 km (2 mi) NNW of here earthquakes near Shasta County
Tehama County, CA 74 km (46 mi) NNE of here earthquakes near Tehama County
Trinity County, CA 90 km (56 mi) E of here earthquakes near Trinity County
Siskiyou County, CA 98 km (61 mi) SSE of here earthquakes near Siskiyou County
Plumas County, CA 136 km (85 mi) NW of here earthquakes near Plumas County
Modoc County, CA 144 km (90 mi) SW of here earthquakes near Modoc 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. 1.7 24km N of Shasta Lake, CA
  2. 1.8 11km ESE of Millville, CA
  3. 1.6 7km WSW of Shingletown, CA
  4. 2.3 9km WSW of Shingletown, CA
  5. 1.8 10km ESE of Millville, CA
  6. 1.7 27km N of Shasta Lake, CA
  7. 1.8 23km N of Shasta Lake, CA
  8. 1.7 1km NE of Shasta Lake, CA
  9. 1.7 13km NNE of Shingletown, CA
  10. 1.9 9km E of Montgomery Creek, CA
  11. 1.7 11km NNE of Bella Vista, CA
  12. 1.9 3km NE of Viola, CA
  13. 2.3 6km ENE of Shasta, CA
  14. 1.6 9km NE of Shasta Lake, CA
  15. 1.6 2km WNW 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.