QuakeIndex

quarry blast · reviewed by a seismologist

M 1.8md

10km N of Oroville, CA

· -0.2 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Butte County 8 kmYuba County 41 kmSutter County 64 kmGlenn County 71 kmColusa County 74 kmNevada County 76 kmPlumas County 77 kmTehama County 81 kmSierra County 90 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
-0.2 km below the surface
Felt
no reports yet
Nearest
Butte County, 8 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2061 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

USGS catalogues this as quarry blast, not an earthquake.

How big was it?

This earthquake released about 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 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 39.6000, -121.5677. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Butte County, CA 8 km (5 mi) SSE of here earthquakes near Butte County
Yuba County, CA 41 km (26 mi) NNW of here earthquakes near Yuba County
Sutter County, CA 64 km (40 mi) N of here earthquakes near Sutter County
Glenn County, CA 71 km (44 mi) E of here earthquakes near Glenn County
Colusa County, CA 74 km (46 mi) NE of here earthquakes near Colusa County
Nevada County, CA 76 km (47 mi) WNW of here earthquakes near Nevada County

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

Aftershocks so far

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

  1. 2.5 17 km E of Willows, CA
  2. 2.2 5 km W of Hamilton City, CA
  3. 2.0 18 km ESE of Willows, CA
  4. 2.0 18 km ESE of Willows, CA
  5. 2.9 6 km W of Hamilton City, CA
  6. 2.2 7 km ENE of Hamilton City, CA
  7. 2.4 18 km E of Willows, CA
  8. 2.6 15 km ENE of Willows, CA
  9. 2.1 18km E of Willows, CA
  10. 2.2 18km E of Willows, CA
  11. 2.1 8km WSW of Durham, CA
  12. 2.3 14km S of Hamilton City, CA
  13. 1.9 3km NW of Chico, CA
  14. 2.1 10km N of Oroville, CA
  15. 2.0 5km SSE of Oroville East, 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.