QuakeIndex

Earthquake · reviewed by a seismologist

M 4.4mw

3km N of Santa Rosa, CA

· 5.6 km deep · released about 58 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sonoma County 20 kmNapa County 33 kmMarin County 47 kmLake County 70 kmSolano County 71 kmYolo County 74 kmSan Francisco County 88 kmColusa County 88 kmContra Costa County 90 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 4.4 (mw)
Depth
5.6 km below the surface
Felt
6902 reports · strongest reported intensity VI
Measured shaking
intensity VI (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
Sonoma County, 20 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 300 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 6902 people have reported feeling it to USGS.

How big was it?

This earthquake released about 58 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 2,900× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 130× the energy of this one
  3. Magna, Utah 2020 M 5.7 92× the energy of this one
  4. This earthquake M 4.4 about 58 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 120× more

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 38.4750, -122.7072. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sonoma County, CA 20 km (12 mi) ESE of here earthquakes near Sonoma County
Napa County, CA 33 km (21 mi) W of here earthquakes near Napa County
Marin County, CA 47 km (29 mi) N of here earthquakes near Marin County
Lake County, CA 70 km (44 mi) S of here earthquakes near Lake County
Solano County, CA 71 km (44 mi) WNW of here earthquakes near Solano County
Yolo County, CA 74 km (46 mi) WSW of here earthquakes near Yolo 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. 2.1 2km SW of Anderson Springs, CA
  3. 1.7 2km WSW of Anderson Springs, CA
  4. 3.1 2km WSW of Anderson Springs, CA
  5. 1.8 4km SSE of The Geysers, CA
  6. 1.5 8km NW of The Geysers, CA
  7. 1.5 3km SE of The Geysers, CA
  8. 1.7 5km WNW of Cobb, CA
  9. 1.7 5km WNW of Cobb, CA
  10. 1.5 10km WNW of The Geysers, CA
  11. 1.6 2km NW of The Geysers, CA
  12. 1.6 2km NW of The Geysers, CA
  13. 1.7 13km NW of The Geysers, CA
  14. 1.7 3km W of Cobb, CA
  15. 1.6 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.0 on 2016-12-14 — it released about 8.5 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.