Seismic test data and resolution analysis from the first borehole broadband seismometers at Mt. Etna, Sicily (Italy), as part of the SiC nano for PicoGeo project

File description Borehole broadband seismometers: The file ‘Borehole_sensors_information.txt’ provides information on the permanently and temporarily installed borehole sensors at both installation sites. Information on gain, true bitweight and sensor sensitivity can be used to correct the raw data records. The file ‘Borehole_sensors_poles_and_zeros.xlsx’ provides poles and zeros of both sensor types. Note: The polarities of the vertical SiA (accelerometer) component of the AFB4.5 seismometer at MAS and SLN appear to be reversed compared to the vertical Geophone components of the AFB4.5 and AG4.5 seismometers. The data loggers store raw data in 1-hr Pascal files, which have been converted into mseed files. Each channel is saved as an individual mseed file. Provided are selected test data from January 2022 (for AFB4.5 and AG4.5 in MAS) and April 2022 (for AFB4.5, AG4.5 in SLN and AFB4.5 in MAS) in the zip-folders labeled ‘Waveforms_xxx_xxx’ (see below). • Zip Folder: Waveforms_SLFB_AFB45 • Zip Folder: Waveforms_SLSP_AG45 • Zip Folder: Waveforms_MAFB_AFB45 • Zip Folder: Waveforms_MASP_AG45 Co-located surface IV-ESLN sensor: The INGV IV-ESLN station is a surface broadband station with 3 components co-located at SLN. 1hr waveform files were downloaded in mseed format from EIDA Italia (source: https://eida.ingv.it/en/getdata). All 3 components are stored in one mseed file. Data that was used for comparison with the borehole sensors is stored in zip-folder ‘Waveforms_SLN_ESLN’. The respective station information is stored in a text file ‘IV_ESLN_station_info.txt’ (source: https://eida.ingv.it/en/networks/network/IV/station/ESLN).