QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

8km W of La Porte, CA

· 11 km deep · released about 7.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 40 kmButte County 45 kmSierra County 50 kmNevada County 51 kmYuba County 52 kmPlacer County 76 kmSutter County 90 kmTehama County 109 kmEl Dorado County 111 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
11 km below the surface
Felt
no reports yet
Nearest
Plumas County, 40 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2515 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 7.6 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 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 39.6877, -121.0830. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 40 km (25 mi) SSW of here earthquakes near Plumas County
Butte County, CA 45 km (28 mi) E of here earthquakes near Butte County
Sierra County, CA 50 km (31 mi) WNW of here earthquakes near Sierra County
Nevada County, CA 51 km (32 mi) NNW of here earthquakes near Nevada County
Yuba County, CA 52 km (32 mi) NNE of here earthquakes near Yuba County
Placer County, CA 76 km (47 mi) NNW of here earthquakes near Placer County

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

Aftershocks so far

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

  1. 1.9 9km W of Caribou, CA
  2. 2.1 7km N of Greenhorn, CA
  3. 1.5 6 km SSE of Quincy, California
  4. 2.2 6km SSE of Quincy, CA
  5. 1.6 7 km ENE of Cromberg, California
  6. 2.0 10km N of Oroville, CA
  7. 1.9 22km SSW of Whitehawk, CA
  8. 2.0 3km WSW of Whitehawk, CA
  9. 1.7 2 km ENE of East Quincy, California
  10. 2.3 9km N of Loma Rica, CA
  11. 2.0 6km N of Greenhorn, CA
  12. 1.8 3km N of Spring Garden, CA
  13. 1.8 10km N of Oroville, CA
  14. 2.4 1km NE of Twain, CA
  15. 1.5 4km N of Twain, 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.