QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

11km S of Tres Pinos, CA

· 6.4 km deep · released about 77 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Benito County 24 kmMonterey County 51 kmSanta Clara County 67 kmSanta Cruz County 70 kmMerced County 77 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 2.3 (md)
Depth
6.4 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
San Benito County, 24 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1769 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 77 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 140,000× the energy of this one
  3. Around the size people start to feel M 3.0 12× the energy of this one
  4. This earthquake M 2.3 about 77 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 36.6943, -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 51 km (31 mi) N of here earthquakes near Monterey County
Santa Clara County, CA 67 km (41 mi) SSE of here earthquakes near Santa Clara County
Santa Cruz County, CA 70 km (43 mi) ESE of here earthquakes near Santa Cruz County
Merced County, CA 77 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

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

  1. 2.1 9km SSW of Tres Pinos, CA
  2. 2.0 5km ESE of Aromas, CA
  3. 1.9 3km N of Pinnacles, CA
  4. 1.7 28km SSW of South Dos Palos, CA
  5. 2.7 4km NW of Pinnacles, CA
  6. 2.1 26km SW of Gustine, CA
  7. 2.0 7km NNW of Pinnacles, CA
  8. 3.2 8km NNW of Pinnacles, CA
  9. 1.9 12km N of Pinnacles, CA
  10. 1.6 7km NNW of Pinnacles, CA
  11. 2.2 11km SE of Pinnacles, CA
  12. 1.9 3km NNW of Pinnacles, CA
  13. 1.9 1km E of Hollister, CA
  14. 1.7 7km NW of Pinnacles, CA
  15. 1.6 3km SSE of San Juan Bautista, 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 4.7 on 2019-10-15 — it released about 4,600 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.