QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

12km NNW of Stony Gorge Reservoir, CA

· 17 km deep · released about 9.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Glenn County 17 kmTehama County 57 kmColusa County 63 kmLake County 66 kmMendocino County 80 kmButte County 83 kmSutter County 104 kmYuba County 115 kmTrinity County 116 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 1.7 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Glenn County, 17 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2421 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 9.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 99× the energy of this one
  4. This earthquake M 1.7 about 9.6 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 39.6878, -122.5675. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Glenn County, CA 17 km (11 mi) NW of here earthquakes near Glenn County
Tehama County, CA 57 km (35 mi) SSW of here earthquakes near Tehama County
Colusa County, CA 63 km (39 mi) NNW of here earthquakes near Colusa County
Lake County, CA 66 km (41 mi) NNE of here earthquakes near Lake County
Mendocino County, CA 80 km (50 mi) ENE of here earthquakes near Mendocino County
Butte County, CA 83 km (51 mi) W of here earthquakes near Butte County

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

Aftershocks so far

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

  1. 2.0 6km SE of Lake Pillsbury, CA
  2. 1.6 6km SE of Lake Pillsbury, CA
  3. 2.3 41km NE of Covelo, CA
  4. 2.1 13km ESE of Willows, CA
  5. 1.9 37km NE of Covelo, CA
  6. 1.7 9km N of Lake Pillsbury, CA
  7. 1.9 8km N of Lake Pillsbury, CA
  8. 1.8 16km NNE of Upper Lake, CA
  9. 2.3 4km SW of Hamilton City, CA
  10. 2.4 8km NNW of Hamilton City, CA
  11. 1.7 9km N of Lake Pillsbury, CA
  12. 2.2 6km SE of Corning, CA
  13. 1.5 5km S of Lake Pillsbury, CA
  14. 2.3 6km SE of Corning, CA
  15. 1.6 2km NW of Lake Pillsbury, 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 5.1 on 2016-08-10 — it released about 130,000 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.