QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

24km SE of Santa Cruz Is. (E end), CA

· 5.9 km deep · released about 1.1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ventura County 57 kmSanta Barbara County 97 kmLos Angeles 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 3.3 (ml)
Depth
5.9 km below the surface
Felt
17 reports · strongest reported intensity III
Nearest
Ventura County, 57 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1744 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 17 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 150,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,700× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,700× the energy of this one
  4. This earthquake M 3.3 about 1.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.4× 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 33.8738, -119.3443. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Ventura County, CA 57 km (36 mi) SSW of here earthquakes near Ventura County
Santa Barbara County, CA 97 km (61 mi) SE of here earthquakes near Santa Barbara County
Los Angeles County, CA 106 km (66 mi) WSW of here earthquakes near Los Angeles County

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

Aftershocks so far

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

  1. 1.6 14km WNW of Malibu, CA
  2. 1.8 10km NW of Malibu, CA
  3. 1.5 9km NW of Malibu, CA
  4. 1.9 1km SSW of Port Hueneme, CA
  5. 1.8 6km NNW of Ventura, CA
  6. 1.9 17km W of Malibu, CA
  7. 2.8 31km NNW of Santa Barbara Is., CA
  8. 1.6 5km WSW of Oxnard, CA
  9. 1.8 6km WSW of Malibu, CA
  10. 2.9 35km NW of Santa Barbara Is., CA
  11. 1.8 20km SSE of Port Hueneme, CA
  12. 2.5 19km SSE of Port Hueneme, CA
  13. 2.0 19km SSE of Port Hueneme, CA
  14. 1.8 5km W of Malibu, CA
  15. 2.1 18km WNW of Malibu, 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 5.3 on 2018-04-05 — it released about 1,100 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.