SERNAGEOMIN reported that inflation had been detected at the Puyehue-Cordón Caulle volcanic complex since 2011 based on GNSS satellite and radar data. The inflation is centered about 6 km WNW of the 2011 eruption vents. The rate of inflation had increased during the first few months of 2024, reaching a maximum average of 2.4 cm per month, which was the highest rate detected since GNSS equipment was installed in 2017. Seismicity began to slightly increase in mid-2020 and was characterized by volcano-tectonic and hybrid events from a shallow source near the 2011 vents. Gas emissions rose from the 2011 vents and were nearly 90 degrees Celsius. The Alert Level was raised to Yellow (the second lowest color on a four-color scale) on 26 April based on the high deformation rates.
Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)
