QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

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 1.6 earthquake was recorded 8 km (5 mi) south-southeast of Cloverdale, CA, at 9:23 am PDT on 12 April 2023 (16:23 UTC), 5.2 km deep.

USGS: 8km SSE of Cloverdale, CA

40 km (25 mi) NW of Santa Rosa, CA · 117 km (73 mi) NNW of San Francisco, CA

9:23 am PDT, Apr 12, 2023 · · 5.2 km deep · released about 7.1 lb of TNT

10 km30 km60 km120 km N Sonoma County 24 kmLake County 45 kmNapa County 62 kmMarin County 79 kmColusa County 80 kmMendocino County 87 kmYolo County 93 kmSolano County 104 kmGlenn County 108 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
9:23 am PDT on 12 April 2023 ()
Where
8 km (5 mi) south-southeast of Cloverdale, CA · earthquakes near Cloverdale
Magnitude
M 1.6 (md)
Depth
5.2 km below the surface
Felt
no reports yet
Nearest
Sonoma County, 24 km S
Nearest mapped fault
Alexander-Redwood Hill fault, under 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 1305 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 10 km (6 mi) from the epicentre. In Cloverdale, 8 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: Cloverdale 8 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 7.1 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 7.1 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 5.0 on 2016-12-14 — about 140,000 times the energy of this one.

Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:

  1. 5.3 3 km E of Bloomfield, California · 49 km SSE of this epicentre
  2. 5.3 Northern California · 48 km SSE of this epicentre
  3. 5.2 6 km ESE of Talmage, California · 43 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 38.7410, -122.9708. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Sonoma County, CA 24 km (15 mi) S earthquakes near Sonoma County
Lake County, CA 45 km (28 mi) NNE earthquakes near Lake County
Napa County, CA 62 km (38 mi) ESE earthquakes near Napa County
Marin County, CA 79 km (49 mi) SSE earthquakes near Marin County
Colusa County, CA 80 km (50 mi) NE earthquakes near Colusa County
Mendocino County, CA 87 km (54 mi) NNW earthquakes near Mendocino County

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

Aftershocks so far

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

  1. 1.7 2km SW of Anderson Springs, CA
  2. 2.2 7km SSW of Calistoga, CA
  3. 1.7 8km NW of The Geysers, CA
  4. 1.5 2km NW of The Geysers, CA
  5. 1.5 6km W of Cobb, CA
  6. 1.6 11km E of Hidden Valley Lake, CA
  7. 1.6 3km W of Anderson Springs, CA
  8. 1.6 2km WSW of Anderson Springs, CA
  9. 2.0 6km W of Cobb, CA
  10. 1.6 1km NW of The Geysers, CA
  11. 1.7 2km NNW of The Geysers, CA
  12. 1.7 4km NW of The Geysers, CA
  13. 1.7 1km NW of The Geysers, CA
  14. 1.7 2km NW of The Geysers, CA
  15. 1.6 6km WNW of The Geysers, 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.