Caution

• All solutions calculated by the FPFIT program are published just as they come, with no amendments by the authors;
• The National Institute of Geophysics and Volcanology authorizes the use of data exclusively for scientific and educational purposes as long as users are committed to cite the collection as follows:

Monachesi G., Ladina C., Calamita C., Pantaleo D., Cattaneo M., Marzorati S., Frapiccini M., D'Alema E., Carannante S. (2021). Beach Balls in central-eastern Italy [Data set]. Istituto Nazionale di Geofisica e Vulcanologia (INGV). https://doi.org/10.13127/bb2021

Whoever uses them should be fully aware of the quality of the data, the issues related to the calculation of focal planes and their meaning.