QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6ml

8km WNW of Fillmore, CA

· 1.8 km deep · released about 3.3 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ventura County 16 kmLos Angeles County 72 kmSanta Barbara County 97 kmKern County 104 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 3.6 (ml)
Depth
1.8 km below the surface
Felt
303 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Ventura County, 16 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1534 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 303 people have reported feeling it to USGS.

How big was it?

This earthquake released about 3.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 51,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,300× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,600× the energy of this one
  4. This earthquake M 3.6 about 3.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 6.9× more

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 34.4365, -118.9912. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Ventura County, CA 16 km (10 mi) ENE of here earthquakes near Ventura County
Los Angeles County, CA 72 km (45 mi) WNW of here earthquakes near Los Angeles County
Santa Barbara County, CA 97 km (60 mi) E of here earthquakes near Santa Barbara County
Kern County, CA 104 km (65 mi) SSW of here earthquakes near Kern County
Orange County, CA 140 km (87 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

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

  1. 1.6 4km SSE of Piru, CA
  2. 1.8 4km W of Ojai, CA
  3. 2.6 5km WSW of Ojai, CA
  4. 1.7 5km W of Ojai, CA
  5. 2.8 5km W of Ojai, CA
  6. 1.7 5km WSW of Ojai, CA
  7. 2.0 6km WSW of Ojai, CA
  8. 1.9 4km WNW of Ojai, CA
  9. 2.8 5km WSW of Ojai, CA
  10. 2.5 5km WSW of Ojai, CA
  11. 2.0 8km SE of Piru, CA
  12. 3.0 10km ESE of Ojai, CA
  13. 4.0 10km NW of Santa Paula, CA
  14. 1.6 17km WNW of Malibu, CA
  15. 2.1 10km NW of Santa Paula, 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 7.2 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.