QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

Earthquake near Oxnard, CA

No earthquake was likely felt in Oxnard in the 24 hours to 2:20 pm PST (22:20 UTC). The last one was M 3.8, 44 km (27 mi) ENE, at 8:00 pm PDT on 29 September 2026, estimated intensity II (weak) in town; 199 felt reports to USGS. Every earthquake near Oxnard

This page: a magnitude 2.8 earthquake was recorded 37 km (23 mi) south-southwest of Oxnard, CA, at 10:05 pm PST on 10 February 2023 (06:05 UTC), 5.9 km deep. 2 people have reported feeling it to USGS.

USGS: 26km SE of Santa Cruz Is. (E end), CA

84 km (52 mi) W of Los Angeles, CA · 36 km (22 mi) SSW of Oxnard, CA

10:05 pm PST, Feb 10, 2023 · · 5.9 km deep · released about 530 lb of TNT

Every earthquake near Oxnard Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ventura County 55 kmSanta Barbara County 99 kmLos Angeles County 102 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
10:05 pm PST on 10 February 2023 ()
Where
37 km (23 mi) south-southwest of Oxnard, CA · earthquakes near Oxnard
Magnitude
M 2.8 (ml)
Depth
5.9 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Ventura County, 55 km NNE
Nearest mapped fault
Dume fault, 1 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1307 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 28 km (17 mi) from the epicentre. In Oxnard, 37 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 530 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 29,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 20,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.8× the energy of this one
  4. This earthquake M 2.8 about 530 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.

For this area

The largest earthquake within 50 km since 2016 was M 5.3 on 2018-04-05 — about 4,900 times the energy of this one.

Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:

  1. 5.5 30 km SW of Channel Islands Beach, California · 22 km NW of this epicentre
  2. 5.5 11km NNW of Santa Barbara Is., CA · 40 km SSE of this epicentre
  3. 5.3 The 1973 Point Mugu, California Earthquake · 26 km ENE of this epicentre
  4. 5.2 9 km SW of Channel Islands Beach, California · 24 km N of this epicentre
  5. 5.1 9km SSE of Santa Cruz Is. (E end), CA · 18 km WNW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 33.8842, -119.3038. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Ventura County, CA 55 km (34 mi) NNE earthquakes near Ventura County
Santa Barbara County, CA 99 km (62 mi) NW earthquakes near Santa Barbara County
Los Angeles County, CA 102 km (63 mi) ENE 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 11 km NW of Malibu, CA
  2. 1.6 16 km WNW of Malibu, CA
  3. 1.7 10 km WNW of Malibu, CA
  4. 1.7 12 km NW of Malibu, CA
  5. 2.0 11 km WNW of Malibu, CA
  6. 2.5 9 km WNW of Malibu, CA
  7. 1.7 12 km WNW of Malibu, CA
  8. 1.8 13 km WNW of Malibu, CA
  9. 2.2 10 km NW of Malibu, CA
  10. 2.4 11 km WNW of Malibu, CA
  11. 3.0 11 km WNW of Malibu, CA
  12. 2.3 11 km WNW of Malibu, CA
  13. 4.6 11 km WNW of Malibu, CA
  14. 1.8 18 km S of Port Hueneme, CA
  15. 2.3 8 km WNW of Malibu, 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.