Further evidences of self-organized criticality in volcanology

In this paper, we aim to provide further evidences about the Self-Organized Criticality (SOC) of volcanic systems. In particular, after results proposed in literature, concerning the seismicity in volcanic areas and the high frequency acoustic emissions, we present some results concerning the inter-time power law distribution of eruptions and explosive activity on Mt. Etna and Stromboli and about lava fountains at Mt. Etna. The power laws experimentally evaluated from considered data set are reported. Results, even far to be exhaustive, may encourage some other scientists to consider SOC as a unifying approach also in the field of volcanology.