QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

7 km SSE of Pescadero, California

· 13 km deep · released about 8.1 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Mateo County 25 kmSanta Cruz County 37 kmSanta Clara County 60 kmAlameda County 64 kmSan Francisco County 84 kmContra Costa County 88 kmMarin County 101 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
13 km below the surface
Felt
no reports yet
Nearest
San Mateo County, 25 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3429 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 8.1 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 1,900,000× 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 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 8.1 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 37.1933, -122.3625. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Mateo County, CA 25 km (15 mi) S of here earthquakes near San Mateo County
Santa Cruz County, CA 37 km (23 mi) WNW of here earthquakes near Santa Cruz County
Santa Clara County, CA 60 km (37 mi) W of here earthquakes near Santa Clara County
Alameda County, CA 64 km (40 mi) SW of here earthquakes near Alameda County
San Francisco County, CA 84 km (52 mi) SE of here earthquakes near San Francisco County
Contra Costa County, CA 88 km (55 mi) SSW of here earthquakes near Contra Costa County

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

Aftershocks so far

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

  1. 1.9 3km WSW of Portola Valley, CA
  2. 1.8 5km SSE of Portola Valley, CA
  3. 1.5 5km S of Portola Valley, CA
  4. 1.7 5km WSW of Cupertino, CA
  5. 1.9 10km NNW of Boulder Creek, CA
  6. 1.7 7km WNW of Lexington Hills, CA
  7. 1.7 4km SW of Stanford, CA
  8. 2.1 11km SSW of Loyola, CA
  9. 2.0 8km SW of Los Altos Hills, CA
  10. 2.6 4km W of Cupertino, CA
  11. 1.6 6km ENE of El Granada, CA
  12. 1.9 4km NE of Portola Valley, CA
  13. 1.6 3 km W of Portola Valley, California
  14. 1.8 4 km WNW of La Honda, California
  15. 1.7 1 km N of North Fair Oaks, 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.