QuakeIndex

Fault · Wyoming

Eagle Bay fault

31 kmlong (19 mi), as mapped
0.2–1 mm/yrhow fast it slips
< 15,000 yearssince it last broke the surface
54quakes 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.

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

USGS maps it as 3 sections: middle section, northern section, southern section.

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

Madison faultTeton faultBuffalo Fork faultRed Canyon faultUpper Yellowstone Valley faultsMirror Plateau faultsEast Mount Sheridan faultsHebgen fault
The Eagle Bay fault as mapped at the surface (glowing), with the other mapped faults nearby, 54 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 2.6 70 km NNE of Kelly, Wyoming
    2025-02-11 · 4 km from the trace
  2. M 2.6 61 km SE of West Yellowstone, Montana
    2024-12-09 · 6 km from the trace
  3. M 3.7 56 km SSE of Mammoth, Wyoming
    2023-03-29 · 3 km from the trace
  4. M 2.5 58 km SSE of Mammoth, Wyoming
    2023-03-29 · 5 km from the trace
  5. M 3.0 64 km ESE of West Yellowstone, Montana
    2023-03-29 · 1 km from the trace
  6. M 2.8 58 km SSE of Mammoth, Wyoming
    2023-03-29 · 4 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.