Europhys. Lett.
Volume 72, Number 3, November 2005
Page(s) 493 - 498
Section Geophysics, astronomy, and astrophysics
Published online 05 October 2005
Europhys. Lett., 72 (3), pp. 493-498 (2005)
DOI: 10.1209/epl/i2005-10258-0

Statistics of inter-time of Strombolian explosion-quakes

M. Bottiglieri1, S. De Martino2, 3, 4, M. Falanga2, 3, 4, C. Godano1 and M. Palo2

1  Dipartimento di Scienze Ambientali, Seconda Università di Napoli Via Vivaldi, 43, Caserta, Italy
2  Dipartimento di Fisica, Università di Salerno - Via S. Allende 84081 Baronissi (SA), Italy
3  INFM unità di Salerno - 84081 Baronissi (SA), Italy
4  INFN, sezione di Napoli, gruppo coordinato di Salerno - 84081 Baronissi (SA), Italy

received 17 February 2005; accepted in final form 13 September 2005
published online 5 October 2005

We consider long-time recorded seismic signals of Stromboli volcano to determine the inter-time distribution function of the Strombolian explosion-quakes. We show that it is Poissonian. Hence, the apparently observed periodic recurrence of the explosions is actually described by the constant rate of a Poisson process. Moreover, combining a diffusive model with the experimental inter-time distribution, we can determine the size distributions of the bubbles and infer the observed slug sizes.

91.40.-k - Volcanology.
02.50.-r - Probability theory, stochastic processes, and statistics.
05.45.Tp - Time series analysis.

© EDP Sciences 2005