Seismo-acoustic data. Mt. Etna,16 July-24 August, 2021

We present a seismo-acoustic dataset recorded by a 7-element, small-aperture array, called ACPN, and an infrasound station, called CONC, deployed at Mt. Etna (Italy) during July-August, 2021. This dataset was collected during a field experiment within the framework of NERC project NE/W004771/1 and SINFONIA project, progetto Bando Ricerca Libera 2021- Delibera 214/2021-INGV.

The experiment was designed to complement the Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo monitoring network, and to provide unprecedented instrument coverage on the summit area of Etna. The main goal was to offer the best possible data to characterize pre- and syn-eruptive seismic tremor associated with the occurrence of surface degassing, fire fountains and atmospheric injection of volcanic ash during paroxysmal activity

This data repository includes continuous raw waveforms and related metadata. The array, ACPN, was installed on Mt. Etna in proximity of the summit Bocca Nuova crater, at a distance of about 1 km from its active vents. The ACPN array consists of five broadband, and two short-period seismic sensors. ACPN was equipped with five Nanometrics Nanometrics Trillium T120 Compact seismometers (T=120s) 3 components, and two Lennartz 3D Lite-MkIII seismometers (T=1s), with flat frequency response of 0.008 - 100 Hz and 1 - 100 Hz, respectively (https://www.nanometrics.ca/products/seismometers; https://www.lennartz-electronic.de/products/seismometers/le-3dlite/). The seismic array had a maximum aperture of 200 m, and both the location and geometry were chosen considering three main criteria: i) site accessibility and safety of personnel; ii) minimising differences in elevation between sensors within each array; iii) optimizing the detection and discrimination of activity from all summit craters.

The infrasonic station CONC was located at an elevation of about 1800 m a.s.l., at a distance of about 5000 m from the craters. The CONC station was equipped with IST-2018 broadband microphones, frequency response between 60 mHz and 40 Hz, developed by The ISTerre, Université Savoie Mont Blanc, France (Grangeon and Lesage, 2019).

Data were sampled at 100 Hz using DIGOS DATACUBE3 digital data recorders (https://digos.eu/CUBE/DATA-CUBE-Datasheet-2017-02.pdf). DATACUBE recorders have an effective resolution of 22.4 bit (at 100 Hz), and a GPS timing accuracy of 1 μs.

The equipment was made available within the framework of an established collaboration between the Instituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, University of Liverpool (UK)) and the Dublin Institute for Advanced Studies (Ireland).