QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

5 km SSW of Monument Hills, California

· 18 km deep · released about 100 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yolo County 7 kmSolano County 39 kmNapa County 40 kmSutter County 49 kmSacramento County 51 kmColusa County 69 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 2.4 (md)
Depth
18 km below the surface
Felt
15 reports · strongest reported intensity III
Nearest
Yolo County, 7 km N
Nearest mapped fault
Great Valley thrust fault system, 13 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 3517 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 15 people have reported feeling it to USGS.

How big was it?

This earthquake released about 100 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 140,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 100,000× the energy of this one
  3. Around the size people start to feel M 3.0 9.1× the energy of this one
  4. This earthquake M 2.4 about 100 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 38.6200, -121.8943. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yolo County, CA 7 km (4 mi) S of here earthquakes near Yolo County
Solano County, CA 39 km (24 mi) N of here earthquakes near Solano County
Napa County, CA 40 km (25 mi) ENE of here earthquakes near Napa County
Sutter County, CA 49 km (31 mi) SSW of here earthquakes near Sutter County
Sacramento County, CA 51 km (32 mi) WNW of here earthquakes near Sacramento County
Colusa County, CA 69 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

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

  1. 1.6 12 km ESE of Hidden Valley Lake, California
  2. 1.8 16 km NNW of Moskowite Corner, California
  3. 1.6 11 km ESE of Hidden Valley Lake, California
  4. 2.5 14 km NNW of Moskowite Corner, California
  5. 2.9 11 km NE of Angwin, California
  6. 1.6 0 km SE of Angwin, California
  7. 1.9 14 km WSW of Esparto, California
  8. 1.8 7 km ENE of Napa, California
  9. 2.8 15 km WSW of Esparto, California
  10. 1.7 13 km NNW of Moskowite Corner, California
  11. 3.3 2 km ENE of Angwin, California
  12. 1.9 14 km NW of Moskowite Corner, California
  13. 1.7 6 km SSW of Nicolaus, California
  14. 1.8 6 km WSW of Dunnigan, California
  15. 2.0 4 km SSE of Monument Hills, 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.