QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

13km S of San Clemente Is. (NW tip), CA

· 5.9 km deep · released about 1,100 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 115 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 3.0 (ml)
Depth
5.9 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Orange County, 115 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1905 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 1,100 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 310,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 14,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,800× the energy of this one
  4. This earthquake M 3.0 about 1,100 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 32.9128, -118.6067. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 115 km (71 mi) SW of here earthquakes near Orange County

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

Aftershocks so far

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

  1. 2.5 12 km SSE of San Clemente Is. (SE tip), CA
  2. 2.9 10 km WNW of San Clemente Is. (SE tip), CA
  3. 1.9 27 km NE of San Clemente Is. (SE tip), CA
  4. 2.6 6 km SE of San Clemente Is. (SE tip), CA
  5. 3.0 25 km SE of San Clemente Is. (SE tip), CA
  6. 2.3 6 km SSE of San Clemente Is. (SE tip), CA
  7. 3.0 8 km SSE of San Clemente Is. (SE tip), CA
  8. 2.9 39 km WSW of San Clemente Is. (SE tip), CA
  9. 2.0 6 km S of Avalon, CA
  10. 2.6 36 km S of Santa Barbara Is., CA
  11. 3.4 22 km W of San Clemente Is. (NW tip), CA
  12. 2.3 4km SE of San Clemente Is. (SE tip), CA
  13. 2.3 8km W of San Clemente Is. (SE tip), CA
  14. 2.6 12km SSE of San Clemente Is. (SE tip), CA
  15. 2.4 7km SSW of San Clemente Is. (SE tip), 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 2019-06-05 — it released about 78 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.