QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

1km WNW of Corralitos, CA

· 12 km deep · released about 6.2 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Santa Cruz County 17 kmSanta Clara County 28 kmSan Mateo County 68 kmAlameda County 73 kmSan Benito County 78 kmMonterey County 95 kmStanislaus County 96 kmMerced County 100 kmContra Costa County 104 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 1.5 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Santa Cruz County, 17 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1312 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 6.2 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.5 about 6.2 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 36.9912, -121.8210. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Santa Cruz County, CA 17 km (10 mi) E of here earthquakes near Santa Cruz County
Santa Clara County, CA 28 km (17 mi) SSW of here earthquakes near Santa Clara County
San Mateo County, CA 68 km (42 mi) SE of here earthquakes near San Mateo County
Alameda County, CA 73 km (46 mi) S of here earthquakes near Alameda County
San Benito County, CA 78 km (48 mi) WNW of here earthquakes near San Benito County
Monterey County, CA 95 km (59 mi) NNW of here earthquakes near Monterey County

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

Aftershocks so far

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

  1. 1.7 9km E of Alum Rock, CA
  2. 1.8 7km SSE of San Juan Bautista, CA
  3. 1.9 2km E of Aromas, CA
  4. 3.0 9km ENE of San Martin, CA
  5. 2.5 12km ESE of Alum Rock, CA
  6. 1.6 12km ESE of Alum Rock, CA
  7. 1.7 12km ESE of Alum Rock, CA
  8. 2.4 12km ESE of Alum Rock, CA
  9. 1.7 2km NNW of Tres Pinos, CA
  10. 2.2 15km N of Morgan Hill, CA
  11. 1.8 2km N of Tres Pinos, CA
  12. 4.4 1km NNW of Tres Pinos, CA
  13. 2.3 2km E of Aromas, CA
  14. 1.7 0km NNE of Tres Pinos, CA
  15. 1.9 8km NE of Interlaken, 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 190,000 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.