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Journal of the Geological Society; 2001; v. 158; issue.3; p. 561-572
© 2001 Geological Society of London

Regular Article

Time seismicity patterns affecting local and regional fault systems in the Etna region: preliminary results for the period 1874–1913

R. AZZARO, M. S. BARBANO, R. RIGANO & S. VINCIGUERRA

1 Istituto Nazionale di Geofisica c/o Sistema Poseidon, Via Monti Rossi 12, 95030, Nicolosi (CT), Italy
2 Dipartimento di Scienze Geologiche, Università di Catania, Corso Italia 55, 95129 Catania, Italy
3 Benfield Greig Hazard Research Centre, Department of Geological Sciences, University College, Gower Street, London WC1E 6BT, UK (e-mail: s.vinciguerra{at}ucl.ac.uk)

Scientific editing by Richard England.

An analysis of time correlation function and fractal dimension has been performed on the seismic activity that affected Mt Etna Volcano (Italy) during 1874–1913 in order to investigate the behaviour of some suspected magma controlling regional fault systems. The time span considered has been characterized by intense seismic and volcanic activity, with eight flank eruptions mainly occurring along the same north–south fissure system. The analysis of historical sources has been used to revise and improve the seismic catalogue; all macroseismic information has been reinterpreted using the new European Macroseismic Scale 1998 (EMS). The results contribute to the definition of the seismic behaviour of some regional fault systems relevant to the geodynamics of the area and provide some insights into the dynamic processes of Mt Etna volcano.


Keywords: seismotectonics, eruptions, autocorrelation, cross-correlation, fractal analysis, Mount Etna.