QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

5km SW of Dublin, CA

· 9.4 km deep · released about 8.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alameda County 7 kmContra Costa County 28 kmSan Mateo County 45 kmSanta Clara County 56 kmSolano County 66 kmSan Joaquin County 69 kmSanta Cruz County 73 kmMarin County 79 kmStanislaus County 87 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
9.4 km below the surface
Felt
no reports yet
Nearest
Alameda County, 7 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2759 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 8.7 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 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.7 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 37.6703, -121.9828. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alameda County, CA 7 km (4 mi) WNW of here earthquakes near Alameda County
Contra Costa County, CA 28 km (17 mi) S of here earthquakes near Contra Costa County
San Mateo County, CA 45 km (28 mi) NE of here earthquakes near San Mateo County
Santa Clara County, CA 56 km (35 mi) NNW of here earthquakes near Santa Clara County
Solano County, CA 66 km (41 mi) S of here earthquakes near Solano County
San Joaquin County, CA 69 km (43 mi) WSW of here earthquakes near San Joaquin 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. 1.7 2km NNW of San Leandro, CA
  2. 1.7 3km WNW of Diablo, CA
  3. 1.5 3km S of Loyola, CA
  4. 2.3 8km E of Alum Rock, CA
  5. 1.7 11km SE of Livermore, CA
  6. 2.5 4km WSW of Colma, CA
  7. 1.8 2km E of Berkeley, CA
  8. 1.6 5km SW of Pacheco, CA
  9. 2.7 3km NNE of San Ramon, CA
  10. 2.4 1km N of Vine Hill, CA
  11. 2.8 3km NE of Oakland, CA
  12. 2.4 17km ESE of Livermore, CA
  13. 1.8 8km SSE of Portola Valley, CA
  14. 2.0 1km NNE of Pacheco, CA
  15. 1.5 3km ESE of Berkeley, 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 4.4 on 2018-01-04 — it released about 13,000 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.