QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

Earthquake near Laytonville, CA

No earthquake was likely felt in Laytonville in the 24 hours to 11:41 pm PST (07:41 UTC). The last one was M 2.4, 13 km (8 mi) WSW, at 7:25 am PST on 4 November 2026, estimated intensity II (weak) in town. Every earthquake near Laytonville

This page: a magnitude 2.4 earthquake was recorded 19 km (12 mi) northwest of Laytonville, CA, at 9:01 pm PDT on 31 March 2025 (04:01 UTC), 6.1 km deep. 1 person has reported feeling it to USGS.

USGS: 19 km NNW of Laytonville, CA

9:01 pm PDT, Mar 31, 2025 · · 6.1 km deep · released about 120 lb of TNT

Every earthquake near Laytonville Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mendocino County 46 kmTrinity County 101 kmHumboldt County 101 kmGlenn County 107 kmLake County 109 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
9:01 pm PDT on 31 March 2025 ()
Where
19 km (12 mi) northwest of Laytonville, CA · earthquakes near Laytonville
Magnitude
M 2.4 (md)
Depth
6.1 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Mendocino County, 46 km SSE
Nearest mapped fault
Maacama fault, 10 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 583 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 20 km (12 mi) from the epicentre. In Laytonville, 19 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Likely felt in: Laytonville 19 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 89,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.9× the energy of this one
  4. This earthquake M 2.4 about 120 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.3 on 2024-06-22 — about 810 times the energy of this one.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 5.9 9 km S of Leggett, California · 11 km WSW of this epicentre
  2. 5.5 7 km ESE of Shelter Cove, California · 38 km WNW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 39.8275, -123.6152. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Mendocino County, CA 46 km (29 mi) SSE earthquakes near Mendocino County
Trinity County, CA 101 km (63 mi) NNE earthquakes near Trinity County
Humboldt County, CA 101 km (63 mi) NNW earthquakes near Humboldt County
Glenn County, CA 107 km (66 mi) ESE earthquakes near Glenn County
Lake County, CA 109 km (68 mi) SE earthquakes near Lake County
Tehama County, CA 122 km (76 mi) ENE earthquakes near Tehama County

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

Aftershocks so far

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

  1. 2.1 4 km NNE of Laytonville, CA
  2. 1.6 9 km W of Laytonville, CA
  3. 1.6 7 km SSE of Laytonville, CA
  4. 1.6 15 km SW of Laytonville, CA
  5. 1.6 4 km NW of Redway, CA
  6. 2.0 4 km NW of Redway, CA
  7. 1.9 6 km NE of Willits, CA
  8. 2.0 15 km SSE of Laytonville, CA
  9. 1.6 6 km SE of Redway, CA
  10. 1.6 15 km SSE of Laytonville, CA
  11. 2.0 12 km ESE of Redway, CA
  12. 2.2 11 km NNE of Brooktrails, CA
  13. 1.7 12 km ESE of Redway, CA
  14. 1.9 2 km SE of Brooktrails, CA
  15. 1.7 22 km NNW 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.