QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

14km N of Castaic, CA

· 7.9 km deep · released about 550 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ventura County 54 kmLos Angeles County 58 kmKern County 82 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 2.8 (ml)
Depth
7.9 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Ventura County, 54 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2784 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 550 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 28,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.8 about 550 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 34.6138, -118.6360. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Ventura County, CA 54 km (33 mi) ENE of here earthquakes near Ventura County
Los Angeles County, CA 58 km (36 mi) NW of here earthquakes near Los Angeles County
Kern County, CA 82 km (51 mi) S of here earthquakes near Kern County
Orange County, CA 131 km (81 mi) NW of here earthquakes near Orange 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. 2.0 12km WSW of Lake Hughes, CA
  2. 1.7 6km NNW of Pacoima, CA
  3. 1.5 19km NE of Ojai, CA
  4. 1.6 7km N of Moorpark, CA
  5. 2.2 13km NNW of Fillmore, CA
  6. 1.6 21km N of Neenach, CA
  7. 2.0 0km ESE of San Fernando, CA
  8. 1.7 6km NNW of Pacoima, CA
  9. 1.8 6km NNW of Pacoima, CA
  10. 2.5 5km NNW of Pacoima, CA
  11. 1.7 9km SE of Santa Paula, CA
  12. 1.5 3km NW of Frazier Park, CA
  13. 1.5 8km E of Lebec, CA
  14. 1.6 15km N of Fillmore, CA
  15. 1.8 17km SSW of Gorman, 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 86 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.