QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

38 km SSW of Port Hueneme, California

· 5.8 km deep · released about 37 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ventura County 63 kmSanta Barbara County 105 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 2.1 (ml)
Depth
5.8 km below the surface
Felt
no reports yet
Nearest
Ventura County, 63 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3442 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 37 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 33.8110, -119.3093. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Ventura County, CA 63 km (39 mi) SSW of here earthquakes near Ventura County
Santa Barbara County, CA 105 km (65 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

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

  1. 1.6 12km WNW of Malibu, CA
  2. 1.7 31km S of Malibu, CA
  3. 1.5 25km S of Malibu, CA
  4. 2.9 22km SE of Santa Cruz Is. (E end), CA
  5. 2.1 31km NNW of Santa Barbara Is., CA
  6. 2.6 12km W of Malibu, CA
  7. 1.6 16km SW of Thousand Oaks, CA
  8. 2.9 13km W of Malibu, CA
  9. 1.6 5km SSW of Camarillo, CA
  10. 2.3 27km SW of Santa Cruz Is. (E end), CA
  11. 1.7 18km S of Port Hueneme, CA
  12. 1.7 11km SW of Westlake Village, CA
  13. 2.1 12km WNW of Malibu, CA
  14. 2.0 26km S of Port Hueneme, CA
  15. 2.3 26km S of Port Hueneme, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.