Sciotto, M., Scuderi, L., &amp; Torrisi, O. (2022). <i>Infrasonic signals recorded at  Mt. Etna by ECPN, EMFO, EMFS, EMNR, ESLN permanent stations during period 19-20 february 2021 (Etna_InfSgn2021)</i> (Version 1) [Dataset]. Istituto Nazionale di Geofisica e Vulcanologia (INGV). https://doi.org/10.13127/ETNA_INFRA/RAW_20210219_20