QuakeIndex

Fault · California

Yuha Well Fault Zone

16 kmlong (10 mi), as mapped
not measuredhow fast it slips
last 150 yearssince it last broke the surface
37quakes of M2.5+ within 10 km since 2016

In plain English

It has broken the ground surface within the last 150 years.

The largest earthquake recorded near it was M 4.8 in 2023 (11 km E of Ocotillo, CA) — about 500 times the energy of an M3.0, the size people start to feel. It released about 240 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

Elsinore faultSan Jacinto faultBrawley Seismic ZoneImperial faultExtra faultYuha Basin faults
The Yuha Well Fault Zone as mapped at the surface (glowing), with the other mapped faults nearby, 37 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 4.8 11 km E of Ocotillo, CA
    December 1, 2023 · epicentre 1 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 2.7 18 km E of Ocotillo, CA
    2026-01-11 · 5 km from the trace
  2. M 2.7 14 km ENE of Ocotillo, CA
    2025-11-23 · 4 km from the trace
  3. M 2.9 13 km SE of Ocotillo, CA
    2025-09-03 · 7 km from the trace
  4. M 2.6 17 km ENE of Ocotillo, CA
    2025-07-13 · 6 km from the trace
  5. M 2.5 15 km ENE of Ocotillo, CA
    2024-03-03 · 4 km from the trace
  6. M 3.6 11 km E of Ocotillo, CA
    2023-12-06 · 1 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.