QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

Earthquake near Cloverdale, CA

Yes: an earthquake was likely felt in Cloverdale in the last 24 hours. M 1.7, 7 km (4 mi) SE of Cloverdale, at 7:43 pm PST on 11 November 2026 (03:43 UTC); the estimated shaking in Cloverdale was intensity II (weak). Every earthquake near Cloverdale

This page: a magnitude 3.0 earthquake was recorded 14 km (9 mi) north of Cloverdale, CA, at 12:54 pm PDT on 15 October 2021 (19:54 UTC), 4.4 km deep. 43 people have reported feeling it to USGS.

USGS: 14km N of Cloverdale, CA

12:54 pm PDT, Oct 15, 2021 · · 4.4 km deep · released about 860 lb of TNT

10 km30 km60 km120 km N Lake County 32 kmSonoma County 46 kmMendocino County 66 kmColusa County 74 kmNapa County 77 kmGlenn County 93 kmMarin County 101 kmYolo County 102 kmSutter 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
12:54 pm PDT on 15 October 2021 ()
Where
14 km (9 mi) north of Cloverdale, CA · earthquakes near Cloverdale
Magnitude
M 3.0 (ml)
Depth
4.4 km below the surface
Felt
43 reports · strongest reported intensity III
Nearest
Lake County, 32 km NE
Nearest mapped fault
Maacama fault, 1 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 1668 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 35 km (22 mi) from the epicentre. In Cloverdale, 14 km away, the estimate is intensity III (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: Cloverdale 14 km, intensity III · Lakeport 16 km, intensity III · Upper Lake 28 km, intensity II · Ukiah 29 km, intensity II · Cobb 30 km, intensity II · Boonville 30 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 860 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 390,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 18,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 12,000× the energy of this one
  4. This earthquake M 3.0 about 860 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 5.1 on 2016-08-10 — about 1,500 times the energy of this one.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.2 6 km ESE of Talmage, California · 21 km NNW 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 38.9293, -123.0352. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Lake County, CA 32 km (20 mi) NE earthquakes near Lake County
Sonoma County, CA 46 km (29 mi) SSE earthquakes near Sonoma County
Mendocino County, CA 66 km (41 mi) NNW earthquakes near Mendocino County
Colusa County, CA 74 km (46 mi) ENE earthquakes near Colusa County
Napa County, CA 77 km (48 mi) SE earthquakes near Napa County
Glenn County, CA 93 km (58 mi) NE earthquakes near Glenn County

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

Aftershocks so far

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

  1. 1.7 6km NW of The Geysers, CA
  2. 1.5 2km WSW of Anderson Springs, CA
  3. 1.5 1km NNW of The Geysers, CA
  4. 1.5 2km N of The Geysers, CA
  5. 1.9 8km NW of The Geysers, CA
  6. 1.9 10km SSE of Talmage, CA
  7. 2.1 10km SSE of Talmage, CA
  8. 1.6 12km WNW of Redwood Valley, CA
  9. 1.6 1km NNW of The Geysers, CA
  10. 1.9 7km NW of The Geysers, CA
  11. 1.6 7km NW of The Geysers, CA
  12. 1.7 18km SE of Lake Pillsbury, CA
  13. 2.0 3km SSW of Anderson Springs, CA
  14. 2.9 2km SW of Anderson Springs, CA
  15. 1.8 6km W of Cobb, 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.