QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

9km NNE of Benicia, CA

· 7.2 km deep · released about 7.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Solano County 22 kmContra Costa County 28 kmNapa County 46 kmMarin County 55 kmAlameda County 56 kmYolo County 64 kmSacramento County 77 kmSan Joaquin County 77 kmSan Mateo County 82 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 1.6 (md)
Depth
7.2 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Solano County, 22 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1562 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 38.1278, -122.1210. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Solano County, CA 22 km (14 mi) SW of here earthquakes near Solano County
Contra Costa County, CA 28 km (17 mi) NNW of here earthquakes near Contra Costa County
Napa County, CA 46 km (28 mi) SSE of here earthquakes near Napa County
Marin County, CA 55 km (34 mi) E of here earthquakes near Marin County
Alameda County, CA 56 km (35 mi) NNW of here earthquakes near Alameda County
Yolo County, CA 64 km (40 mi) SSW of here earthquakes near Yolo County

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

Aftershocks so far

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

  1. 1.8 2km NNW of Oakland, CA
  2. 1.9 3km WNW of Concord, CA
  3. 1.5 2km W of Concord, CA
  4. 1.7 2km WNW of Concord, CA
  5. 2.1 2km NNE of San Leandro, CA
  6. 1.7 4km WNW of Dublin, CA
  7. 1.5 7km E of Santa Venetia, CA
  8. 2.1 6km NW of Bay Point, CA
  9. 2.0 12km NNE of Yountville, CA
  10. 1.9 2km ENE of Berkeley, CA
  11. 1.6 6km SSW of Suisun City, CA
  12. 1.8 2km SE of Pacheco, CA
  13. 1.7 3km ESE of Berkeley, CA
  14. 2.0 3km ESE of Berkeley, CA
  15. 1.7 5km E of Vallejo, 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 4.5 on 2019-10-15 — it released about 19,000 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.