QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

33km NNW of Susanville, CA

· 13 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lassen County 16 kmPlumas County 77 kmWashoe County 97 kmModoc County 101 kmShasta County 104 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 1.8 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Lassen County, 16 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1963 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 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× the energy of this one
  4. This earthquake M 1.8 about 16 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 40.6887, -120.8098. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lassen County, CA 16 km (10 mi) W of here earthquakes near Lassen County
Plumas County, CA 77 km (48 mi) N of here earthquakes near Plumas County
Washoe County, NV 97 km (60 mi) W of here earthquakes near Washoe County
Modoc County, CA 101 km (63 mi) S of here earthquakes near Modoc County
Shasta County, CA 104 km (65 mi) E of here earthquakes near Shasta County
Butte County, CA 132 km (82 mi) NNE of here earthquakes near Butte County

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

Aftershocks so far

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

  1. 1.8 37 km N of Chester, CA
  2. 1.8 4 km NNW of Hamilton Branch, CA
  3. 2.0 37km SE of Fall River Mills, CA
  4. 2.4 47km NNW of Susanville, CA
  5. 1.6 14km NNW of Chester, CA
  6. 2.0 5km NE of Hamilton Branch, CA
  7. 2.3 26km SE of Fall River Mills, CA
  8. 1.6 29 km NW of Susanville, California
  9. 1.8 36km SE of Fall River Mills, CA
  10. 1.9 23km ESE of McArthur, CA
  11. 2.5 48km NNW of Susanville, CA
  12. 1.6 25km NNE of Hamilton Branch, 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.