QuakeIndex

Fault · Oregon

Thompson Ridge fault

49 kmlong (30 mi), as mapped
> 5 mm/yrhow fast it slips
< 15,000 yearssince it last broke the surface
0quakes of M2.5+ within 10 km since 2016

In plain English

The two sides grind past each other faster than 5 mm a year — more than half a metre (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 beltBlanco transform faultCoos Basin faultCoquille anticlineSouth Slough synclineSouth Slough thrust and reverse faults
The Thompson Ridge fault as mapped at the surface (glowing), with the other mapped faults nearby, . Traces: USGS Quaternary Fault and Fold Database. Historic epicentres are estimates.

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.