QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

3 km ENE of Lompico, California

· 9.8 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Santa Cruz County 11 kmSanta Clara County 32 kmSan Mateo County 46 kmAlameda County 60 kmContra Costa County 90 kmSan Benito County 100 kmStanislaus County 103 kmSan Francisco County 112 kmSan Joaquin County 112 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
9.8 km below the surface
Felt
no reports yet
Nearest
Santa Cruz County, 11 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3515 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 12 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 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 870,000× the energy of this one
  3. Around the size people start to feel M 3.0 78× the energy of this one
  4. This earthquake M 1.7 about 12 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 37.1152, -122.0193. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Santa Cruz County, CA 11 km (7 mi) N of here earthquakes near Santa Cruz County
Santa Clara County, CA 32 km (20 mi) WSW of here earthquakes near Santa Clara County
San Mateo County, CA 46 km (28 mi) SE of here earthquakes near San Mateo County
Alameda County, CA 60 km (37 mi) S of here earthquakes near Alameda County
Contra Costa County, CA 90 km (56 mi) S of here earthquakes near Contra Costa County
San Benito County, CA 100 km (62 mi) NW of here earthquakes near San Benito County

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

Aftershocks so far

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

  1. 1.6 6 km ENE of East Foothills, California
  2. 1.8 3 km S of Loyola, California
  3. 1.8 4 km N of East Foothills, California
  4. 2.4 9 km ESE of East Foothills, California
  5. 2.6 23 km SSW of Santa Cruz, California
  6. 1.9 7 km NNE of East Foothills, California
  7. 2.8 22 km SSW of Santa Cruz, California
  8. 2.0 1 km NW of Ladera, California
  9. 1.5 0 km NE of Woodside, California
  10. 1.9 8 km NE of Gilroy, California
  11. 2.0 14 km E of Seven Trees, California
  12. 2.1 6 km ENE of East Foothills, California
  13. 1.5 Northern California
  14. 2.4 6 km NE of East Foothills, California
  15. 1.8 2 km E of Aromas, 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.