QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

9 km E of Gilroy, California

· 5.5 km deep · released about 180 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Santa Clara County 33 kmSanta Cruz County 48 kmSan Benito County 54 kmMerced County 70 kmStanislaus County 76 kmAlameda County 83 kmMonterey County 84 kmSan Mateo County 93 kmSan Joaquin County 106 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 2.5 (md)
Depth
5.5 km below the surface
Felt
8 reports · strongest reported intensity III
Nearest
Santa Clara County, 33 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3168 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 8 people have reported feeling it to USGS.

How big was it?

This earthquake released about 180 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 83,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 59,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.2× the energy of this one
  4. This earthquake M 2.5 about 180 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 36.9898, -121.4660. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Santa Clara County, CA 33 km (20 mi) SE of here earthquakes near Santa Clara County
Santa Cruz County, CA 48 km (30 mi) E of here earthquakes near Santa Cruz County
San Benito County, CA 54 km (34 mi) NW of here earthquakes near San Benito County
Merced County, CA 70 km (43 mi) WSW of here earthquakes near Merced County
Stanislaus County, CA 76 km (47 mi) SSW of here earthquakes near Stanislaus County
Alameda County, CA 83 km (52 mi) SSE of here earthquakes near Alameda County

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

Aftershocks so far

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

  1. 2.1 19 km SSE of Tres Pinos, California
  2. 1.6 18 km SSE of Tres Pinos, California
  3. 2.4 18 km SSE of Tres Pinos, California
  4. 2.7 18 km SSE of Tres Pinos, California
  5. 2.6 18 km SSE of Tres Pinos, California
  6. 2.2 17 km SSE of Tres Pinos, California
  7. 1.7 17 km SSE of Tres Pinos, California
  8. 1.5 17 km SSE of Tres Pinos, California
  9. 1.9 19 km SSE of Tres Pinos, California
  10. 4.6 18 km SSE of Tres Pinos, California
  11. 2.2 8 km ENE of San Martin, California
  12. 1.8 7 km SE of Tres Pinos, California
  13. 1.6 12 km ESE of East Foothills, California
  14. 2.7 8 km ENE of San Martin, California
  15. 2.3 5 km SW of Gilroy, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.2 on 2016-07-19 — it released about 350 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.