QuakeIndex

Earthquake · reviewed by a seismologist

M 4.2mw

10 km S of Tres Pinos, California

· 5.9 km deep · released about 32 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Benito County 24 kmMonterey County 50 kmSanta Clara County 67 kmSanta Cruz County 70 kmMerced County 78 kmStanislaus County 101 kmAlameda County 118 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 4.2 (mw)
Depth
5.9 km below the surface
Felt
773 reports · strongest reported intensity III
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
San Benito County, 24 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2418 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 773 people have reported feeling it to USGS.

How big was it?

This earthquake released about 32 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 5,200× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 230× the energy of this one
  3. Magna, Utah 2020 M 5.7 170× the energy of this one
  4. This earthquake M 4.2 about 32 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 68× more

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 36.6925, -121.3297. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Benito County, CA 24 km (15 mi) WNW of here earthquakes near San Benito County
Monterey County, CA 50 km (31 mi) N of here earthquakes near Monterey County
Santa Clara County, CA 67 km (42 mi) SSE of here earthquakes near Santa Clara County
Santa Cruz County, CA 70 km (44 mi) ESE of here earthquakes near Santa Cruz County
Merced County, CA 78 km (48 mi) SW of here earthquakes near Merced County
Stanislaus County, CA 101 km (63 mi) SSW of here earthquakes near Stanislaus 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. 3.4 21 km NE of Soledad, California
  2. 2.1 7 km ENE of Gilroy, California
  3. 1.6 35 km ENE of Greenfield, California
  4. 2.0 9 km S of Tres Pinos, California
  5. 1.6 25 km WSW of Volta, California
  6. 1.7 12 km S of Tres Pinos, California
  7. 2.1 21 km NE of Soledad, California
  8. 1.8 2 km ENE of Aromas, California
  9. 1.7 21 km NE of Soledad, California
  10. 1.8 25 km NNE of King City, California
  11. 2.1 23 km ENE of Soledad, California
  12. 1.6 24 km SE of Tres Pinos, California
  13. 2.1 21 km NE of Soledad, California
  14. 1.8 24 km WSW of Volta, California
  15. 2.2 11 km S of Tres Pinos, 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.