QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

Earthquake near Santa Rosa, CA

No earthquake was likely felt in Santa Rosa in the 24 hours to 8:38 pm PST (04:38 UTC). The last one was M 1.9, 5 km (3 mi) NE, at 2:01 pm PDT on 23 October 2026, estimated intensity II (weak) in town. Every earthquake near Santa Rosa

This page: a magnitude 3.0 earthquake was recorded 6 km (3 mi) northeast of Santa Rosa, CA, at 8:25 pm PDT on 2 April 2024 (03:25 UTC), 9.3 km deep. 997 people have reported feeling it to USGS.

USGS: 4 km NE of Santa Rosa, CA

in Santa Rosa, CA

8:25 pm PDT, Apr 2, 2024 · · 9.3 km deep · released about 860 lb of TNT

Every earthquake near Santa Rosa Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sonoma County 23 kmNapa County 30 kmMarin County 48 kmSolano County 68 kmYolo County 70 kmLake County 71 kmColusa County 87 kmContra Costa County 88 kmSan Francisco County 89 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
8:25 pm PDT on 2 April 2024 ()
Where
6 km (3 mi) northeast of Santa Rosa, CA · earthquakes near Santa Rosa
Magnitude
M 3.0 (ml)
Depth
9.3 km below the surface
Felt
997 reports · strongest reported intensity III
Nearest
Sonoma County, 23 km WNW
Nearest mapped fault
Rodgers Creek 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 69 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 34 km (21 mi) from the epicentre. In Santa Rosa, 6 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: Santa Rosa 6 km, intensity III · Kenwood 13 km, intensity III · Calistoga 14 km, intensity III · Windsor 15 km, intensity II · Rohnert Park 15 km, intensity II · Angwin 22 km, intensity II · Agua Caliente 23 km, intensity II · Healdsburg 23 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 5.0 on 2016-12-14 — about 1,100 times the energy of this one.

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

  1. 6.0 The 2014 South Napa, California Earthquake · 42 km SE of this epicentre
  2. 5.3 3 km E of Bloomfield, California · 21 km SW of this epicentre
  3. 5.3 Northern California · 22 km SW 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 38.4745, -122.6683. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Sonoma County, CA 23 km (14 mi) WNW earthquakes near Sonoma County
Napa County, CA 30 km (19 mi) E earthquakes near Napa County
Marin County, CA 48 km (30 mi) S earthquakes near Marin County
Solano County, CA 68 km (42 mi) ESE earthquakes near Solano County
Yolo County, CA 70 km (44 mi) ENE earthquakes near Yolo County
Lake County, CA 71 km (44 mi) N earthquakes near Lake County

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

Aftershocks so far

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

  1. 2.0 7 km W of Cobb, CA
  2. 1.7 3 km ENE of The Geysers, CA
  3. 1.8 8 km NW of The Geysers, CA
  4. 1.7 8 km NW of The Geysers, CA
  5. 1.8 7 km WSW of Kenwood, CA
  6. 1.5 2 km N of The Geysers, CA
  7. 1.7 2 km NNE of The Geysers, CA
  8. 1.9 7 km NW of The Geysers, CA
  9. 3.0 7 km NW of The Geysers, CA
  10. 1.6 7 km NW of The Geysers, CA
  11. 2.6 2 km NNW of The Geysers, CA
  12. 1.8 7 km NW of The Geysers, CA
  13. 1.8 8 km NW of The Geysers, CA
  14. 1.5 8 km NW of The Geysers, CA
  15. 1.6 6 km WNW 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.