caa a22 4500 477047874 CHVBK 20180405111335.0 cr unu---uuuuu 170330e19961001xx s 000 0 eng 10.1007/BF01089699 doi (NATIONALLICENCE)springer-10.1007/BF01089699 Intermittent behaviour of volcanic tremor at Mt. Etna [Elektronische Daten] [C. Godano, C. Cardaci, E. Privitera] Harmonic tremor is widely studied and modelled in a very narrow frequency band (1-5 Hz) which represents the eigenfrequencies of a resonator assumed as the source of the phenomenon. Minimal effort was dedicated towards understanding its behaviour in larger temporal scales. Here we characterise the dynamic behaviour of volcanic tremor while evaluating the complete spectrum of the generalised dimension of the phase space. The starting time series constitutes the tremor amplitude picked every 10 minutes. The choice of this lag time is made on the basis of a qualitative analysis of the properties of the tremor. The results show intermittent behaviour of the dynamics which requires an 8-dimensional map to be completely described. An interesting result is that the maximum clustering of point density in phase space occurs in a monodimensional space which implies a periodicity sometimes observed experimentally. An appropriate predictive model needs more constraints on the nature of the eight variables involved in the process. Birkhäuser Verlag, 1996 Volcanic tremor nationallicence intermittency nationallicence chaos nationallicence Godano C. Istituto Geofisico e Geodetico, Università di Messina, via Osservatorio 4, 98100, Messina, Italy aut Cardaci C. Istituto Internazionale di Vulcanologia, CNR, Catania, Italy aut Privitera E. Istituto Internazionale di Vulcanologia, CNR, Catania, Italy aut pure and applied geophysics Birkhäuser-Verlag 147/4(1996-10-01), 729-744 0033-4553 147:4<729 1996 147 24 https://doi.org/10.1007/BF01089699 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01089699 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Godano C. Istituto Geofisico e Geodetico, Università di Messina, via Osservatorio 4, 98100, Messina, Italy aut NATIONALLICENCE 700 1- Cardaci C. Istituto Internazionale di Vulcanologia, CNR, Catania, Italy aut NATIONALLICENCE 700 1- Privitera E. Istituto Internazionale di Vulcanologia, CNR, Catania, Italy aut NATIONALLICENCE 773 0- pure and applied geophysics Birkhäuser-Verlag 147/4(1996-10-01), 729-744 0033-4553 147:4<729 1996 147 24 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer