QuakeIndex

Fault · California

San Cayetano fault

42 kmlong (26 mi), as mapped
> 5 mm/yrhow fast it slips
< 15,000 yearssince it last broke the surface
62quakes of M2.5+ within 10 km since 2016

In plain English

The two sides grind past each other faster than 5 mm a year — more than half a metre (20 inches) every century.

Its most recent surface rupture is younger than 15,000 years.

The largest earthquake recorded near it was M 4.1 in 2016 (17km ENE of Ojai, CA) — about 50 times the energy of an M3.0, the size people start to feel. It released about 24 tons of TNT.

This week vs. its last ten years

0/100

quiet

0 quakes of M1.5+ within 5 km of the trace in the last 7 days — busier than 0% of weeks since 2016. A normal week: 0–0.

Computed from the USGS catalogue · a description of the past, not a forecast · method

San Andreas faultGarlock faultNewport-Inglewood-Rose Canyon faultSanta Ynez faultSan Gabriel faultSierra Madre faultPitas Point faultPalos Verdes faultOak Ridge fault (offshore)Mission Ridge fault systemSan Pedro Basin faultSanta Cruz Island faultMalibu Coast faultSanta Cruz faultDume faultOak Ridge faultSimi-Santa Rosa faultPuente Hills blind thrust systemMid-Channel faultRed Mountain faultPleito faultSanta Monica faultNorthridge blind thrustWheeler Ridge faultRaymond faultVerdugo faultHollywood faultVentura faultIsla Vista fault
The San Cayetano fault as mapped at the surface (glowing), with the other mapped faults nearby, 62 of the M2.5+ earthquakes within 10 km of it since 2016 (dots), . Traces: USGS Quaternary Fault and Fold Database. Historic epicentres are estimates.

Every year since 2016

Earthquakes of M2.5+ with an epicentre within 10 km of the mapped trace. Near is not the same as on: some will have slipped on neighbouring faults.

The big ones recorded near it

  1. M 4.1 17km ENE of Ojai, CA
    March 12, 2016 · epicentre 10 km from the trace
  2. M 4.0 7 km ESE of Ojai, CA
    November 3, 2023 · epicentre 8 km from the trace

Before 1973 from the USGS ComCat historical catalogue (within 25 km; epicentres of old earthquakes are estimates). Since 2016, M4+ within 10 km.

Most recent near it

  1. M 2.5 11 km N of Fillmore, CA
    2026-09-18 · 6 km from the trace
  2. M 2.6 9 km SW of Valencia, CA
    2026-08-12 · 10 km from the trace
  3. M 3.4 15 km NW of Fillmore, CA
    2026-06-06 · 7 km from the trace
  4. M 2.5 1 km NE of Fillmore, CA
    2026-05-02 · 0 km from the trace
  5. M 2.6 1 km NNE of Fillmore, CA
    2026-05-02 · 0 km from the trace
  6. M 2.8 13 km NW of Fillmore, CA
    2025-12-16 · 7 km from the trace

Neighbouring faults

Fault trace, slip rate and age: USGS Quaternary Fault and Fold Database (public domain), simplified for the web. Earthquakes: USGS ComCat. QuakeIndex does not forecast earthquakes; a fault's history describes the past. For early warning use ShakeAlert.