Particularly well located earthquakes exist at Etna volcano for the period May 1983-February 1987, since an 18-stations seismic network was in operation. The space-time clustering of the seismic activity is analyzed statistically in this period by using the model of Gasperini and Mulargia (1989), which is based on the influence region. The following clustering features are identified: (1) clustering is mainly originated by swarm-type sequences; (2) two magnitude-dependent best fits are obtained by an influence region of respectively 1.5 to 6 days and 15 to 20 km; (3) no evident space and time relation between clusters and eruptions is apparent. © 1992.
Time and space clustering of Etna volcano earthquakes during the period May 1983-February 1987 / Gasperini P.; Gresta S.; Mulargia F.; Distefano G.. - In: JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH. - ISSN 0377-0273. - STAMPA. - 53:1-4(1992), pp. 297-307. [10.1016/0377-0273(92)90088-U]
Time and space clustering of Etna volcano earthquakes during the period May 1983-February 1987
Gasperini P.
Primo
Membro del Collaboration Group
;Mulargia F.Membro del Collaboration Group
;
1992
Abstract
Particularly well located earthquakes exist at Etna volcano for the period May 1983-February 1987, since an 18-stations seismic network was in operation. The space-time clustering of the seismic activity is analyzed statistically in this period by using the model of Gasperini and Mulargia (1989), which is based on the influence region. The following clustering features are identified: (1) clustering is mainly originated by swarm-type sequences; (2) two magnitude-dependent best fits are obtained by an influence region of respectively 1.5 to 6 days and 15 to 20 km; (3) no evident space and time relation between clusters and eruptions is apparent. © 1992.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
