QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

7km NE of Laytonville, CA

· 10 km deep · released about 5.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mendocino County 33 kmGlenn County 88 kmLake County 90 kmTrinity County 106 kmTehama County 110 kmHumboldt County 117 kmColusa County 118 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 1.5 (md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Mendocino County, 33 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2081 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 5.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.7 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 39.7262, -123.4148. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mendocino County, CA 33 km (20 mi) N of here earthquakes near Mendocino County
Glenn County, CA 88 km (55 mi) W of here earthquakes near Glenn County
Lake County, CA 90 km (56 mi) NW of here earthquakes near Lake County
Trinity County, CA 106 km (66 mi) SSW of here earthquakes near Trinity County
Tehama County, CA 110 km (68 mi) WSW of here earthquakes near Tehama County
Humboldt County, CA 117 km (73 mi) SSE of here earthquakes near Humboldt 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. 1.9 26km N of Laytonville, CA
  2. 2.3 26km N of Laytonville, CA
  3. 1.6 15km SE of Laytonville, CA
  4. 2.1 9km ESE of Willits, CA
  5. 1.8 3km ENE of Laytonville, CA
  6. 1.9 12km WNW of Redwood Valley, CA
  7. 2.8 9km ESE of Willits, CA
  8. 2.1 7km ENE of Laytonville, CA
  9. 1.6 10km ESE of Willits, CA
  10. 2.6 3km ENE of Laytonville, CA
  11. 2.3 4km NE of Laytonville, CA
  12. 1.7 5km NNW of Lake Pillsbury, CA
  13. 1.6 4km ENE of Laytonville, CA
  14. 1.7 16km NE of Willits, CA
  15. 3.9 15km NNW 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 4.3 on 2019-04-29 — it released about 16,000 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.