QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

22 km NE of San Lucas, CA

· 9.5 km deep · released about 180 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Monterey County 41 kmSan Benito County 42 kmKings County 97 kmMerced County 103 kmSan Luis Obispo 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
9.5 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Monterey County, 41 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 430 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has 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 36.2792, -120.8635. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Monterey County, CA 41 km (25 mi) E of here earthquakes near Monterey County
San Benito County, CA 42 km (26 mi) SSE of here earthquakes near San Benito County
Kings County, CA 97 km (60 mi) WNW of here earthquakes near Kings County
Merced County, CA 103 km (64 mi) S of here earthquakes near Merced County
San Luis Obispo County, CA 106 km (66 mi) NNW of here earthquakes near San Luis Obispo County
Fresno County, CA 121 km (75 mi) WSW of here earthquakes near Fresno County

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

Aftershocks so far

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

  1. 2.3 21 km NNW of Parkfield, CA
  2. 1.5 16 km SE of Pinnacles, CA
  3. 2.0 11 km SE of Pinnacles, CA
  4. 1.9 11 km SE of Pinnacles, CA
  5. 2.0 10 km NNW of Pinnacles, CA
  6. 2.5 10 km NNW of Pinnacles, CA
  7. 1.5 2 km NNE of Pinnacles, CA
  8. 1.7 12 km NNE of Coalinga, CA
  9. 1.9 15 km NW of Parkfield, CA
  10. 2.1 4 km NE of San Ardo, CA
  11. 1.6 16 km SSE of Pinnacles, CA
  12. 1.5 20 km NNW of Parkfield, CA
  13. 2.1 4 km ENE of Pinnacles, CA
  14. 2.4 23 km NW of Parkfield, CA
  15. 1.7 12 km SE of Pinnacles, 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 4.3 on 2021-01-02 — it released about 500 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.