QuakeIndex

Fault · Washington

Utsalady Point fault

29 kmlong (18 mi), as mapped
< 0.2 mm/yrhow fast it slips
< 15,000 yearssince it last broke the surface
14quakes of M2.5+ within 10 km since 2016

In plain English

The two sides move less than 0.2 mm a year — under 2 cm a century. Slow faults can still produce large earthquakes, just rarely.

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

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

Calawah faultSouthern Whidbey Island faultLake Creek-Boundary Creek faultBirch Bay faultSandy Point faultBoulder Creek-Canyon Creek fault
The Utsalady Point fault as mapped at the surface (glowing), with the other mapped faults nearby, 14 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 3.8 2 km E of Oak Harbor, Washington
    2026-07-02 · 1 km from the trace
  2. M 2.9 2 km ESE of Oak Harbor, Washington
    2026-06-08 · 0 km from the trace
  3. M 2.5 4 km ENE of Oak Bay, Canada
    2025-03-26 · 10 km from the trace
  4. M 3.3 1 km NNE of Coupeville, Washington
    2024-01-18 · 7 km from the trace
  5. M 3.4 2 km SSE of Stanwood, Washington
    2023-11-17 · 9 km from the trace
  6. M 2.6 21 km S of Friday Harbor, Washington
    2023-07-07 · 2 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.