QuakeIndex

Fault · California

Bullion Mountains fault

35 kmlong (22 mi), as mapped
not measuredhow fast it slips
< 15,000 yearssince it last broke the surface
4quakes of M2.5+ within 10 km since 2016

In plain English

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

This week vs. its last ten years

Too quiet to rank: fewer than half a year's worth of weeks with any M1.5+ quake within 5 km, in ten years. A single quake here would read as "unusual", so we do not score it.

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 faultPisgah-Bullion 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 faultManix faultHomestead Valley faultIndio Hills Fault ZoneBurnt Mountain faultCoachella Fan Fault ZoneBanning faultEureka Peak faultLong Canyon faultOld Woman Springs faultBeaumont Plain fault
The Bullion Mountains fault as mapped at the surface (glowing), with the other mapped faults nearby, 4 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 · 6 km from the trace
  2. M 2.7 26km SSW of Ludlow, CA
    2023-06-17 · 4 km from the trace
  3. M 2.8 19km SSW of Ludlow, CA
    2020-09-20 · 5 km from the trace
  4. M 2.9 19km SSW of Ludlow, CA
    2016-12-26 · 5 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.