QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

27 km WSW of Paskenta, California

· 7.9 km deep · released about 23 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Glenn County 39 kmTehama County 65 kmMendocino County 65 kmLake County 72 kmColusa County 80 kmTrinity County 103 kmButte 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 1.9 (md)
Depth
7.9 km below the surface
Felt
no reports yet
Nearest
Glenn County, 39 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3460 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 23 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 5.8 660,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 470,000× the energy of this one
  3. Around the size people start to feel M 3.0 42× the energy of this one
  4. This earthquake M 1.9 about 23 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 39.7508, -122.8098. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Glenn County, CA 39 km (24 mi) WNW of here earthquakes near Glenn County
Tehama County, CA 65 km (40 mi) SW of here earthquakes near Tehama County
Mendocino County, CA 65 km (40 mi) ENE of here earthquakes near Mendocino County
Lake County, CA 72 km (45 mi) N of here earthquakes near Lake County
Colusa County, CA 80 km (50 mi) NW of here earthquakes near Colusa County
Trinity County, CA 103 km (64 mi) SSE of here earthquakes near Trinity County

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

Aftershocks so far

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

  1. 1.5 15 km NE of Potter Valley, California
  2. 1.7 15 km NE of Potter Valley, California
  3. 1.9 15 km NE of Potter Valley, California
  4. 1.9 17 km NW of Elk Creek, California
  5. 1.6 30 km WNW of Paskenta, California
  6. 1.6 19 km ENE of Potter Valley, California
  7. 1.7 20 km ENE of Potter Valley, California
  8. 1.5 28 km W of Paskenta, California
  9. 1.6 28 km W of Paskenta, California
  10. 1.8 15 km ENE of Potter Valley, California
  11. 2.2 22 km NNE of Potter Valley, California
  12. 1.8 18 km E of Potter Valley, California
  13. 3.0 26 km SE of Ruth, California
  14. 2.3 17 km WNW of Paskenta, California
  15. 1.6 19 km NNE of Upper Lake, California

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 5.1 on 2016-08-10 — it released about 57,000 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.