QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

9 km ESE of Black Point-Green Point, California

· 10 km deep · released about 5.9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Marin County 29 kmContra Costa County 45 kmSolano County 46 kmNapa County 47 kmSonoma County 66 kmAlameda County 66 kmSan Francisco County 68 kmSan Mateo County 75 kmYolo County 79 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 1.5 (md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Marin County, 29 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3317 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 5.9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 160× the energy of this one
  4. This earthquake M 1.5 about 5.9 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 38.0895, -122.4142. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Marin County, CA 29 km (18 mi) E of here earthquakes near Marin County
Contra Costa County, CA 45 km (28 mi) WNW of here earthquakes near Contra Costa County
Solano County, CA 46 km (29 mi) WSW of here earthquakes near Solano County
Napa County, CA 47 km (29 mi) S of here earthquakes near Napa County
Sonoma County, CA 66 km (41 mi) SE of here earthquakes near Sonoma County
Alameda County, CA 66 km (41 mi) NW of here earthquakes near Alameda County

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

Aftershocks so far

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

  1. 2.0 2km ENE of Saint Helena, CA
  2. 2.1 5km WSW of Yountville, CA
  3. 2.4 10km S of Elmira, CA
  4. 1.9 19km SW of Bolinas, CA
  5. 2.6 2km NNE of San Leandro, CA
  6. 1.7 5km NNE of San Leandro, CA
  7. 2.4 1km E of Pacheco, CA
  8. 1.6 2 km NNW of Pleasant Hill, California
  9. 1.6 11 km S of Muir Beach, California
  10. 2.3 1 km E of Pacheco, California
  11. 2.1 7 km ENE of Fetters Hot Springs-Agua Caliente, California
  12. 1.7 11 km NE of Oakville, California
  13. 1.6 7 km NE of Rohnert Park, California
  14. 1.6 2 km W of Danville, California
  15. 1.6 8 km WNW of Broadmoor, 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.