QuakeIndex

Fault · California

Pisgah-Bullion fault

97 kmlong (60 mi), as mapped
0.2–1 mm/yrhow fast it slips
last 150 yearssince it last broke the surface
12quakes of M2.5+ within 10 km since 2016

In plain English

The two sides move 0.2 to 1 mm a year — 2 to 10 cm every century.

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

USGS maps it as 4 sections: Bullion section, East Bullion section, Pisgah section, West Bullion.

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 faultElsinore faultGarlock faultSan Jacinto faultLenwood-Lockhart faultHelendale-South Lockhart faultCalico-Hidalgo faultCamp Rock-Emerson-Copper Mountain faultPinto Mountain fault (includes Morongo Valley fault)North Frontal thrust systemHarper faultBlackwater faultJohnson Valley faultLavic Lake faultMesquite Lake faultSan Gorgonio Pass faultBullion Mountains faultManix faultHomestead Valley faultIndio Hills Fault ZoneBurnt Mountain faultCrafton Hills faultCoachella Fan Fault ZoneMt. General faultBanning faultEureka Peak faultLong Canyon faultOld Woman Springs faultBeaumont Plain fault
The Pisgah-Bullion fault as mapped at the surface (glowing), with the other mapped faults nearby, 12 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.

Most recent near it

  1. M 2.5 30 km NNW of Twentynine Palms, CA
    2026-03-25 · 1 km from the trace
  2. M 2.6 17 km W of Ludlow, CA
    2025-09-09 · 5 km from the trace
  3. M 2.6 27 km WNW of Ludlow, CA
    2025-07-14 · 8 km from the trace
  4. M 2.6 14 km WSW of Ludlow, CA
    2024-03-30 · 8 km from the trace
  5. M 2.6 12 km WSW of Ludlow, CA
    2023-10-30 · 9 km from the trace
  6. M 2.6 12 km WSW of Ludlow, CA
    2023-10-27 · 10 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.