Altiplano-Puna Magma Body

[5] This causes material to be removed from the APMB to feed the growing diapir, resulting in a region of subsidence surrounding the uplift zone.

[5][11] More recent InSAR data, collected between September 2014 and December 2017, shows that the uplift rate over this period has decreased to 3–5 mm/year and may experience short-term velocity reversals.

[10][9] Between 1996 and 1997, several broadband seismic stations were deployed over the Altiplano-Puna Volcanic Complex (APVC) in order to characterize the magmatic structures beneath the surface.

[4] These stations found a low velocity region approximately 10–20 km beneath the surface that was interpreted to be a sill-like magma body associated with the APVC.

[16] Continued investigation of Bouguer anomaly data led to the discovery of a column-like, low density structure extending from the top of the APMB with a diameter of approximately 15 km.

Magnetotelluric stations were deployed across the Central Andes and resolved a highly conductive region beneath the Altiplano-Puna plateau, which appeared to coincide with the low velocity zone associated with the APMB.