Active volcanoes frequently show substantial topographic changes and variable eruption intensity, style and/or directionality. Here we provide high-resolution photogrammetric data sets of Stromboli’s crater terrace collected during 5 field campaigns between May 2019 and January 2020 supporting the publication Schmid, M, Kueppers U, Ricci T, Taddeucci J, Civico R and Dingwell DB (2021) “Characterizing Vent and Crater Shape Changes at Stromboli: Implications for Risk Areas”.
The aerial imagery for the photogrammetric reconstruction of the crater terrace geometry was acquired by UAVs (DJI Phantom 4Pro+ & Mavic 2 Pro) and processed with the commercial software Metashape by Agisoft. The created digital elevation models (DEMs), orthomosaics and 3D models were used to characterize vent and crater shape and their changes through time. The activity during the observational period was characterized by elevated Strombolian activity and two paroxysms on 3 July and 28 August 2019.
Our study revealed significant changes to crater terrace morphology and vent geometry on various time scales and the strong control of vent geometry on the directionality of explosions.
These data files contain short periods of electrical data recorded at Stromboli volcano, Italy, in 2019 and 2020 using a prototype version of the Biral Thunderstorm Detector BTD-200. This sensor consists of two antennas, the primary and secondary antenna, which detect slow variations in the electrostatic field resulting from charge neutralisation due to electrical discharges.
The sensor recorded at three different locations: BTD1 (38.79551°N, 15.21518°E), BTD2 (38.80738°N, 15.21355°E) and BTD3 (38.79668°N, 15.21622°E).
Electrical data of the following explosions is provided (each in a separate data file):
- Three Strombolian explosions on 12 June 2019 at 12:46:53, 12:49:27 and 12:56:10 UTC, respectively.
- A major explosion on 25 June 2019 at 23:03:08 UTC.
- A major explosion on 19 July 2020 at 03:00:42 UTC.
- A major explosion on 16 November 2020 at 09:17:45 UTC.
- A paroxysmal event at 3 July 2019 at 14:45:43 UTC.
Each filename indicates the location of the BTD, the starting date and time of the file in UTC, and a short description of the three data columns inside the file (unixtime, primary, secondary). The first column provides the Unix timestamp of each data point, which is the time in seconds since 01/01/1970. All time is provided in UTC. The second column provides the measured voltage [V] recorded by the primary antenna. The third column provides the measured voltage [V] recorded by the secondary antenna.