QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

6km W of Newark, CA

· 11 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alameda County 21 kmSan Mateo County 27 kmContra Costa County 45 kmSanta Clara County 51 kmSanta Cruz County 59 kmMarin County 81 kmSolano County 83 kmSan Francisco County 84 kmSan Joaquin County 86 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 1.7 (md)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Alameda County, 21 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1423 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 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 95× the energy of this one
  4. This earthquake M 1.7 about 10 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 37.5350, -122.1040. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alameda County, CA 21 km (13 mi) SW of here earthquakes near Alameda County
San Mateo County, CA 27 km (17 mi) ENE of here earthquakes near San Mateo County
Contra Costa County, CA 45 km (28 mi) SSW of here earthquakes near Contra Costa County
Santa Clara County, CA 51 km (31 mi) NW of here earthquakes near Santa Clara County
Santa Cruz County, CA 59 km (36 mi) N of here earthquakes near Santa Cruz County
Marin County, CA 81 km (50 mi) SE of here earthquakes near Marin County

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

Aftershocks so far

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

  1. 2.5 8km NNE of Alum Rock, CA
  2. 1.7 10km E of Alum Rock, CA
  3. 2.0 3km NNE of Fremont, CA
  4. 1.5 2km NNE of Pleasant Hill, CA
  5. 1.6 20km NE of Alum Rock, CA
  6. 1.8 9km SSW of Brentwood, CA
  7. 1.8 2km NE of Hayward, CA
  8. 1.6 2km NE of Hayward, CA
  9. 2.1 2km NNE of Hayward, CA
  10. 3.3 3km N of Union City, CA
  11. 2.9 2km NNE of San Leandro, CA
  12. 1.5 15km E of Seven Trees, CA
  13. 1.9 2km SSE of Pacheco, CA
  14. 1.8 4km WSW of San Francisco Zoo, CA
  15. 2.0 15km E of Seven Trees, 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 5.1 on 2022-10-25 — it released about 120,000 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.