Infrasonic Early Warning System for Explosive Eruptions

The two datasets 2018JB015561-ds01 and 2018JB015561-ds02 provide data used to create most of the figures and to reach most of the findings of the manuscript [Ripepe, M.; Marchetti, E.; Delle Donne, D.; Genco, R.; Innocenti, L.; Lacanna, G.; Valade, S. Infrasonic Early Warning System for Explosive Eruption. J. Geophys. Res. Solid Earth 2018, 123, 9570–9585].

2018JB015561-ds01 is a matlab (,mat) file containing a sample of infrasound detections (December, 2nd, 2013) between 09:00 and 24:00 UTC. This dataset is used to create part of Figure 3 of the manuscript. Infrasound detections are obtained from raw infrasound data as discussed in Section 4. Infrasound detections (evaluated every 5 seconds) are used to create the IP, which is evaluated every minute as discussed in detail in Section 5.

Data Set S1. 2018JB015561-ds01: The file consists three variables: t, that corresponds to matlab time; pr, that corresponds to the acoustic pressure of the detection as recorded at the array; az, that corresponds to the infrasound back-azimuth and is used to limit the analysis to infrasound produced by the volcano. The data has a time stamp of 5 seconds.

2018JB015561-ds02 is a matlab (.mat) file containing the infrasound parameter, between January, 1st, 2008 and December, 31st, 2016. The infrasound parameter is obtained from infrasound detections following the procedure described in Section 5, and used eventually to provide the automatic notification as described in section 6. This dataset is used to create Figure 5 of the manuscript.

Data Set S2. 2018JB015561-ds02: It contains two variables: t, that corresponds to matlab time; ip, that corresponds to the infrasound parameter. The data has a time stamp of 1 minute.

The movie shows an example of how the IP calculated with the ETN infrasound array is efficiently tracking the changes of eruptive activity at Etna and can be used to deliver an alert of ongoing volcanic activity.

Movie S1. 2018JB015561-ms01: The movie shows the eruptive activity at Etna volcano recorded between 23:00 UTC of December, 3rd, 2015, and 12:00 UTC of December, 4th, 2015. It shows movies from a thermal camera synchronized with the corresponding values of seismic tremor and Infrasound Parameter. The Early Warning level is over imposed on the IP.