QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

35km NW of Santa Barbara Is., CA

· 5.9 km deep · released about 630 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ventura County 79 kmSanta Barbara County 115 kmLos Angeles County 117 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 2.9 (ml)
Depth
5.9 km below the surface
Felt
no reports yet
Nearest
Ventura County, 79 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1555 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 630 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 24,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 17,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.5× the energy of this one
  4. This earthquake M 2.9 about 630 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 33.6698, -119.3565. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Ventura County, CA 79 km (49 mi) SSW of here earthquakes near Ventura County
Santa Barbara County, CA 115 km (71 mi) SSE of here earthquakes near Santa Barbara County
Los Angeles County, CA 117 km (73 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

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

  1. 1.8 18 km S of Port Hueneme, CA
  2. 1.6 19 km SSW of Port Hueneme, CA
  3. 2.7 27 km SSW of Port Hueneme, CA
  4. 2.6 17km SE of Santa Cruz Is. (E end), CA
  5. 1.8 31km NE of Santa Barbara Is., CA
  6. 2.0 18km SSW of Malibu, CA
  7. 3.7 21km SSW of Malibu, CA
  8. 1.7 14km SSE of Port Hueneme, CA
  9. 3.6 15km SSE of Port Hueneme, CA
  10. 2.8 26km SE of Santa Cruz Is. (E end), CA
  11. 2.3 15km SSE of Port Hueneme, CA
  12. 2.8 33km NW of Santa Barbara Is., CA
  13. 2.8 31km NNW of Santa Barbara Is., 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 4,100 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.