QuakeIndex

Fault · Oregon

Stonewall anticline

70 kmlong (43 mi), as mapped
1–5 mm/yrhow fast it slips
< 15,000 yearssince it last broke the surface
9quakes 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.

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

Cascadia megathrustCascadia fold and fault beltDaisy Bank faultAlvin Canyon fault
The Stonewall anticline as mapped at the surface (glowing), with the other mapped faults nearby, 9 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 20 km W of Newport, Oregon
    2026-02-08 · 2 km from the trace
  2. M 2.7 27 km WNW of Yachats, Oregon
    2024-12-29 · 7 km from the trace
  3. M 3.1 39 km WNW of Yachats, Oregon
    2023-11-10 · 6 km from the trace
  4. M 3.0 23 km W of Newport, Oregon
    2018-07-11 · 1 km from the trace
  5. M 3.1 29 km W of Neskowin, Oregon
    2018-02-04 · 7 km from the trace
  6. M 2.8 25 km W of Yachats, Oregon
    2017-09-05 · 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.