QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

5 km SSW of Monument Hills, California

· 13 km deep · released about 650 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yolo County 7 kmNapa County 39 kmSolano County 39 kmSutter County 49 kmSacramento County 52 kmColusa County 68 kmContra Costa County 78 kmYuba County 87 kmSonoma 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 2.9 (md)
Depth
13 km below the surface
Felt
11 reports · strongest reported intensity III
Nearest
Yolo County, 7 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3516 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 11 people have reported feeling it to USGS.

How big was it?

This earthquake released about 650 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 23,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.5× the energy of this one
  4. This earthquake M 2.9 about 650 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.

Where

Epicentre 38.6202, -121.9010. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yolo County, CA 7 km (4 mi) S of here earthquakes near Yolo County
Napa County, CA 39 km (24 mi) ENE of here earthquakes near Napa County
Solano County, CA 39 km (24 mi) N of here earthquakes near Solano County
Sutter County, CA 49 km (31 mi) SSW of here earthquakes near Sutter County
Sacramento County, CA 52 km (32 mi) WNW of here earthquakes near Sacramento County
Colusa County, CA 68 km (43 mi) SSE of here earthquakes near Colusa County

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

Aftershocks so far

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

  1. 1.9 13 km ESE of Hidden Valley Lake, California
  2. 1.9 4 km WNW of Moskowite Corner, California
  3. 1.5 4 km WSW of Moskowite Corner, California
  4. 1.5 0 km SE of Green Valley, California
  5. 2.5 5 km S of Monument Hills, California
  6. 1.5 13 km NE of Rutherford, California
  7. 1.5 2 km E of Saint Helena, California
  8. 2.1 12 km ESE of Elmira, California
  9. 2.2 6 km WSW of Moskowite Corner, California
  10. 2.0 14 km NNW of Moskowite Corner, California
  11. 2.3 14 km E of Angwin, California
  12. 1.6 Northern California
  13. 1.8 14 km E of Angwin, California
  14. 2.3 14 km NNW of Moskowite Corner, California
  15. 1.7 14 km NNW of Moskowite Corner, California

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.