QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

20km SSE of Carpinteria, CA

· 2.1 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ventura County 33 kmSanta Barbara County 64 kmLos Angeles County 110 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
2.1 km below the surface
Felt
no reports yet
Nearest
Ventura County, 33 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3258 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 51 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 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 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 34.2258, -119.4563. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Ventura County, CA 33 km (21 mi) WSW of here earthquakes near Ventura County
Santa Barbara County, CA 64 km (40 mi) ESE of here earthquakes near Santa Barbara County
Los Angeles County, CA 110 km (68 mi) W 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

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

  1. 2.6 21km S of Port Hueneme, CA
  2. 1.6 8km ESE of Carpinteria, CA
  3. 2.1 20km WSW of Ventura, CA
  4. 1.8 14km SSE of Santa Barbara, CA
  5. 1.8 15km SSE of Santa Barbara, CA
  6. 2.4 15km WNW of Malibu, CA
  7. 2.3 21km NNW of Santa Cruz Is. (E end), CA
  8. 2.7 29km SW of Santa Cruz Is. (E end), CA
  9. 2.0 14km SW of Port Hueneme, CA
  10. 2.6 28km SW of Santa Cruz Is. (E end), CA
  11. 2.4 29km SE of Santa Cruz Is. (NW end), CA
  12. 1.7 29km SW of Santa Cruz Is. (E end), CA
  13. 1.7 6km ESE of Port Hueneme, CA
  14. 2.4 17km SW of Port Hueneme, CA
  15. 1.9 20km SE 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.1 on 2016-03-12 — it released about 930 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.