QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0md

7km SSE of Laytonville, CA

· 8.1 km deep · released about 33 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mendocino County 23 kmLake County 84 kmGlenn County 89 kmColusa County 115 kmTrinity County 116 kmTehama County 117 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 2.0 (md)
Depth
8.1 km below the surface
Felt
no reports yet
Nearest
Mendocino County, 23 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3204 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 33 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 450,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 320,000× the energy of this one
  3. Around the size people start to feel M 3.0 29× the energy of this one
  4. This earthquake M 2.0 about 33 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 39.6355, -123.4418. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mendocino County, CA 23 km (14 mi) N of here earthquakes near Mendocino County
Lake County, CA 84 km (52 mi) NW of here earthquakes near Lake County
Glenn County, CA 89 km (55 mi) W of here earthquakes near Glenn County
Colusa County, CA 115 km (72 mi) WNW of here earthquakes near Colusa County
Trinity County, CA 116 km (72 mi) SSW of here earthquakes near Trinity County
Tehama County, CA 117 km (73 mi) WSW of here earthquakes near Tehama County

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

Aftershocks so far

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

  1. 1.7 15km SSW of Willits, CA
  2. 1.7 16km WNW of Lake Pillsbury, CA
  3. 1.8 7km ENE of Brooktrails, CA
  4. 2.8 16km WNW of Lake Pillsbury, CA
  5. 1.7 24km NW of Alder Springs, CA
  6. 1.6 25km NE of Covelo, CA
  7. 1.5 6km SSE of Laytonville, CA
  8. 1.9 8km ESE of Willits, CA
  9. 2.0 7km NW of Laytonville, CA
  10. 1.6 5km SW of Laytonville, CA
  11. 2.0 4km NE of Lake Pillsbury, CA
  12. 1.6 16km NNW of Covelo, CA
  13. 1.8 9km NNE of Laytonville, CA
  14. 1.8 5km SW of Laytonville, CA
  15. 2.0 13km SSE of Laytonville, 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 4.1 on 2016-11-06 — it released about 1,100 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.