Liquiñe-Ofqui Fault is major geological fault that runs a length of roughly 1200 km in a NNE-SSW orientation and exhibits current seismicity . It is located in the Chilean Northern Patagonian Andes . It is a dextral intra-arc strike-slip fault . 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 . The fault crosses several transverse faults including the Mocha-Villarrica Fault Zone ( MVFZ ) and the Biobío-Aluminé Fault Zone . The fault have had periods of ductile deformation associated to pluton emplacement be it either at great depths or by shallow intrusions . The forces that move the fault are derivative of the oblique subduction offshore Chile 's coast . This leads to partition of deformation between the subduction zone , the fore-arc and the intra-arc region where the fault lies . A portion of the fault in Aysén Region likely slipped ( moved ) in an aftershock a few weeks after the 1960 Valdivia earthquake . This same portion slipped again in April 2007 causing earthquakes in Aysén Fjord , triggering landslides and a local tsunami
1960 Valdivia earthquake
1960 Valdivia earthquake
Liquiñe-Ofqui Fault