GNGTS 2022 - Atti del 40° Convegno Nazionale

114 GNGTS 2022 Sessione 1.2 Since P-to-S converted phases are generally more evident in the radial and tangential components of a record, the horizontal components of each selected event have been rotated versus back-azimuth. After applying a zero-phaseshift 5 Hz low-pass-filter to exclude undesired high frequency noise and to better evidence the direct P-wave, a first analysis of the seismograms in the time domain has been performed to identify, if any, P-to-S converted phases (Milano et al. , 2001) before applying the receiver functions technique. The first results show a likelihood between the seismograms of MEFA and RSF3 while some discrepancies can be observed from the comparison between MEFA and the stations more than 5 km away from the latter. These results, even if preliminary, bode well for obtaining information on the identification of any discontinuities in the first 10 km of the crust. References Cusano P., Del Gaudio P., Galluzzo D., Gaudiosi G., Gervasi A., La Rocca M., Martino C., Milano G., Nardone L., Petrosino S., Torello V., Zuccarello L., Di Luccio F.; 2021: Analysis of background seismicity recorded at Mefite d’Ansato CO2 emission field in the framework of FURTHER project: first results. EGU General Assembly 2021, https://doi.org/10.5194/egusphere-egu21-10625 Langston C.A.; 1979: Structure under Mount Rainier, Washington, inferred from teleseismic body waves. J. Geoph. Res. V. 84, pp 4749-4762. Milano G., Bianco F., Vilardo G.; 2001: Evidences of P-S conversions beneath the Vesuvius volcanic area (South Italy) from teleseismic data. Volcanology and Seismology, 2001 Volume 5, 73-80.