QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

1km SSE of Palo Alto, CA

· 9.8 km deep · released about 8.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Mateo County 21 kmAlameda County 31 kmSanta Clara County 46 kmSanta Cruz County 48 kmContra Costa County 56 kmSan Francisco County 85 kmMarin County 87 kmSan Joaquin County 94 kmSolano County 94 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
9.8 km below the surface
Felt
no reports yet
Nearest
San Mateo County, 21 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2474 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 8.4 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 1,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,300,000× 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 8.4 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 37.4328, -122.1360. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Mateo County, CA 21 km (13 mi) E of here earthquakes near San Mateo County
Alameda County, CA 31 km (19 mi) SW of here earthquakes near Alameda County
Santa Clara County, CA 46 km (29 mi) WNW of here earthquakes near Santa Clara County
Santa Cruz County, CA 48 km (30 mi) NNW of here earthquakes near Santa Cruz County
Contra Costa County, CA 56 km (35 mi) SSW of here earthquakes near Contra Costa County
San Francisco County, CA 85 km (53 mi) ESE of here earthquakes near San Francisco 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 13km ESE of Alum Rock, CA
  2. 1.5 4km NNE of Fairview, CA
  3. 1.5 2km E of Berkeley, CA
  4. 1.5 19km SSE of Livermore, CA
  5. 2.0 7km NNE of Alum Rock, CA
  6. 1.9 5km NNE of Dublin, CA
  7. 2.5 1km NNE of Diablo, CA
  8. 1.8 1km S of San Ramon, CA
  9. 1.7 1km E of Fremont, CA
  10. 2.1 10km SE of Livermore, CA
  11. 1.7 1km NE of Diablo, CA
  12. 2.1 1km NE of Diablo, CA
  13. 1.8 0km E of Diablo, CA
  14. 1.5 0km E of Diablo, CA
  15. 1.7 2km ESE of Woodside, 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.