Please use this identifier to cite or link to this item:
Authors: Carniel, R.* 
Iacop, F.* 
Title: Spectral precursors of paroxysmal phases of Stromboli
Issue Date: Mar-1996
Series/Report no.: 2/39 (1996)
Keywords: Spectral analysis
volcanic tremor
Subject Classification04. Solid Earth::04.08. Volcanology::04.08.07. Instruments and techniques 
Abstract: In this work we investigate the characteristics of the seismicity at Stromboli volcano during more than two years, i.e. from 11 May 1992 to 21 August 1994. The three paroxysmal phases of 1993 mark significant changes in the Strombolian activity; nevertheless, these are not the only ones observed. In fact, the energy content, both in terms of volcanic tremor and of number of events drops to very low values after the periods of intense activity, accompanied by a change in the spectral content of the tremor. However, equally abrupt changes in the frequency content, not accompanied by evident intensity variations, can be observed some weeks after the end of the crises. The volcano seems therefore to behave like a dynamical system with many «quite stable » states with abrupt transitions between them. An interesting observation is the appearance of an energy concentration in the spectral sectors below 3 Hz before more violent eruptive episodes; although the duration of such a phenomenon is variable, it has to be investigated as a possible precursor of potentially dangerous activity of the volcano. A continuous monitoring of the spectral content of volcanic tremor on Stromboli is confirmed to be an essential tool in order to understand the behaviour of Stromboli volcano and to try to forecast its paroxysmal phases.
Appears in Collections:Annals of Geophysics

Files in This Item:
File Description SizeFormat
10 carniel.pdf5.64 MBAdobe PDFView/Open
Show full item record

Page view(s) 20

checked on Nov 30, 2022

Download(s) 50

checked on Nov 30, 2022

Google ScholarTM