[2] Most large stratovolcanoes of the Southern Volcanic Zone of the Andes are aligned by the fault which allows for the movement of magma and hydrothermal fluids.

[2] The fault has had periods of ductile deformation associated to pluton emplacement, be it either at great depths or by shallow intrusions.

This leads to partition of deformation between the subduction zone, the fore-arc and the intra-arc region where the fault lies.

[5] This same portion slipped again in April 2007, causing earthquakes in Aysén Fjord, triggering landslides and a local tsunami.

[6] The existence of the fault was first inferred by Chilean government agent Hans Steffen around 1900, who referred to it as a "tectonic furrow" (Spanish: surco tectónico).