Radiocarbon dating at Chufquén has yielded an age of 710 ± 60 years before present. This eruption deposited ash onto the caldera ice, while it is absent from the central parts of the Chufquén valley; either it was removed by a later glacier advance or it landed on a glacier which later retreated. The eruption occurred relatively recently, indicating that Sollipulli is still active. Presently, fumaroles and geothermal phenomena occur at the northwestern foot of Sollipulli.