QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

4km ENE of Laytonville, CA

· 9.8 km deep · released about 7.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mendocino County 30 kmLake County 89 kmGlenn County 89 kmTrinity County 109 kmTehama County 113 kmColusa County 118 kmHumboldt County 119 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
9.8 km below the surface
Felt
no reports yet
Nearest
Mendocino County, 30 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1975 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 7.3 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 2,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,500,000× 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 7.3 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 39.7005, -123.4368. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mendocino County, CA 30 km (19 mi) N of here earthquakes near Mendocino County
Lake County, CA 89 km (55 mi) NW of here earthquakes near Lake County
Glenn County, CA 89 km (55 mi) W of here earthquakes near Glenn County
Trinity County, CA 109 km (68 mi) SSW of here earthquakes near Trinity County
Tehama County, CA 113 km (70 mi) WSW of here earthquakes near Tehama County
Colusa County, CA 118 km (73 mi) WNW of here earthquakes near Colusa County

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

Aftershocks so far

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

  1. 1.8 7km W of Laytonville, CA
  2. 2.4 11km W of Laytonville, CA
  3. 1.6 7km ENE of Brooktrails, CA
  4. 1.5 16km SSW of Willits, CA
  5. 1.5 8km ESE of Willits, CA
  6. 2.0 15km WNW of Lake Pillsbury, CA
  7. 1.5 8km SSE of Laytonville, CA
  8. 1.6 11km SE of Laytonville, CA
  9. 1.6 9km NW of Redwood Valley, CA
  10. 1.6 7km ESE of Willits, CA
  11. 2.8 7km ESE of Willits, CA
  12. 2.5 7km ESE of Willits, CA
  13. 1.9 4km NNW of Laytonville, CA
  14. 1.8 10km SE of Willits, CA
  15. 1.6 8km ENE of Willits, 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 4.3 on 2019-04-29 — it released about 12,000 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.