QuakeIndex

Fault · California, Nevada

Genoa fault

24 kmlong (15 mi), as mapped
1–5 mm/yrhow fast it slips
< 15,000 yearssince it last broke the surface
17quakes of M2.5+ within 10 km since 2016

In plain English

The two sides move 1 to 5 mm a year — 10 to 50 cm (4 to 20 inches) every century.

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

The largest earthquake recorded near it was M 6.5 in 1887 (Near Carson City, Nevada) — about 180,000 times the energy of an M3.0, the size people start to feel. It released about 85 kilotons 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 faultGreat Valley thrust fault systemFoothills fault systemWassuk Range faultSmith Valley faultCarson lineamentTahoe-Sierra frontal faultWest Tahoe-Dollar Point faultAntelope Valley faultEast Carson Valley faultMount Rose faultDog Valley faultPolaris faultNorth Tahoe faultIncline Village faultRobinson Creek faultLittle Valley faultCarson City faultKings Canyon faultWest Walker River fault M 6.5 · 1887 · Near Carson City, Nevada M 6.2 · 1869 · Near Carson City, Nevada
The Genoa fault as mapped at the surface (glowing), with the other mapped faults nearby, 17 of the M2.5+ earthquakes within 10 km of it since 2016 (dots), and the epicentres of the large historic earthquakes recorded near it (rings). 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 6.5 Near Carson City, Nevada
    June 3, 1887 · epicentre 23 km from the trace
  2. M 6.2 Near Carson City, Nevada
    December 27, 1869 · epicentre 12 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 7 km SE of Markleeville, CA
    2025-10-08 · 5 km from the trace
  2. M 2.5 7 km SSW of Markleeville, CA
    2025-08-06 · 1 km from the trace
  3. M 2.8 3 km W of Markleeville, CA
    2025-04-16 · 0 km from the trace
  4. M 3.4 3 km ESE of Mesa Vista, CA
    2024-12-17 · 4 km from the trace
  5. M 2.6 6km SSE of Markleeville, CA
    2023-05-26 · 3 km from the trace
  6. M 3.1 6km SSE of Markleeville, CA
    2023-05-26 · 3 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.