GNGTS 2024 - Atti del 42° Convegno Nazionale

Session 1.2 GNGTS 2024 The state of art of the temperature monitoring network on La Fossa cone (Aeolian Islands, Italy) I. S. Diliberto 1 , M. G. Di Figlia 1 1 Isttuto Nazionale di Geofsica e Vulcanologia, Sezione di Palermo We present the long-term monitoring data, hourly recorded in the high temperature fumaroles (HTF) on the summit of La Fossa Cone, a close conduit volcano on the Island of Vulcano, and describe the actual implementaton of the monitoring network. Its last erupton dates back to 1890. The thermal monitoring of the fumaroles output was included in the framework of geochemical monitoring actvity in 1984 (Inguaggiato et al., 2018), the longest and uniform tme series of data started in 1990 (fg 1) and is stll uninterrupted. During 33 years the HTF temperature has been showing a general decreasing trend, some cyclic modulatons (with the major periodical variaton of about 20 years), with superimposed peaking variatons (Diliberto, 2013). The peaking variatons are correlated to unrest periods. The maximum temperatures recorded by the monitoring network ranged from 250 to 540 °C (Diliberto 2017). In 2023, this network has been implemented, and the number of monitored fumaroles increased to six high temperature vents (Fig. 2, HTF 1-6). Moreover, beside the HTF we started monitoring the temperature of the ground