QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

5 km WSW of Concow, CA

· 17 km deep · released about 19 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Butte County 7 kmYuba County 54 kmPlumas County 70 kmTehama County 72 kmGlenn County 72 kmSutter County 77 kmNevada County 83 kmColusa County 83 kmSierra County 91 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
17 km below the surface
Felt
no reports yet
Nearest
Butte County, 7 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 179 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 19 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 5.8 810,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 580,000× the energy of this one
  3. Around the size people start to feel M 3.0 51× the energy of this one
  4. This earthquake M 1.9 about 19 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 39.7232, -121.5708. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Butte County, CA 7 km (4 mi) NNE of here earthquakes near Butte County
Yuba County, CA 54 km (34 mi) NNW of here earthquakes near Yuba County
Plumas County, CA 70 km (44 mi) WSW of here earthquakes near Plumas County
Tehama County, CA 72 km (45 mi) SE of here earthquakes near Tehama County
Glenn County, CA 72 km (45 mi) E of here earthquakes near Glenn County
Sutter County, CA 77 km (48 mi) N of here earthquakes near Sutter County

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

Aftershocks so far

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

  1. 2.7 5 km W of Hamilton City, CA
  2. 2.0 6 km E of Challenge-Brownsville, CA
  3. 2.1 8 km WNW of La Porte, CA
  4. 2.5 15 km S of Hamilton City, CA
  5. 2.2 4 km WSW of Hamilton City, CA
  6. 2.1 7 km ESE of Challenge-Brownsville, CA
  7. 2.0 17 km E of Willows, CA
  8. 2.3 4 km NNW of Belden, CA
  9. 1.9 19 km E of Willows, CA
  10. 2.4 9 km S of Hamilton City, CA
  11. 1.9 6 km NW of Belden, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2024-04-05 — it released about 6,900 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.