QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

6 km SSW of Ojai, CA

· 2.8 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ventura County 12 kmSanta Barbara County 73 kmLos Angeles County 94 kmKern County 116 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 1.8 (ml)
Depth
2.8 km below the surface
Felt
no reports yet
Nearest
Ventura County, 12 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 265 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 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 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 34.3933, -119.2580. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Ventura County, CA 12 km (8 mi) WNW of here earthquakes near Ventura County
Santa Barbara County, CA 73 km (46 mi) ESE of here earthquakes near Santa Barbara County
Los Angeles County, CA 94 km (58 mi) WNW of here earthquakes near Los Angeles County
Kern County, CA 116 km (72 mi) SSW of here earthquakes near Kern County
San Luis Obispo County, CA 155 km (96 mi) SE of here earthquakes near San Luis Obispo County

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

Aftershocks so far

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

  1. 2.4 20 km NNW of Piru, CA
  2. 1.5 6 km SW of Piru, CA
  3. 1.8 21 km NNW of Piru, CA
  4. 1.9 21 km NNW of Piru, CA
  5. 1.8 21 km NNW of Piru, CA
  6. 1.6 20 km NNW of Piru, CA
  7. 1.6 17 km SSW of Pine Mountain Club, CA
  8. 2.3 13 km N of Fillmore, CA
  9. 3.4 15 km NW of Fillmore, CA
  10. 1.5 4 km SSE of Carpinteria, CA
  11. 2.0 18 km SE of Port Hueneme, CA
  12. 1.6 1 km N of Fillmore, CA
  13. 1.8 12 km NNW of Fillmore, CA
  14. 2.1 1 km N of Fillmore, CA
  15. 1.9 1 km NNE of Fillmore, 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 5.1 on 2023-08-20 — it released about 72,000 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.