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University of Naples
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- PublicationRestrictedQc of three component seismograms of volcanic earthquakes at Campi Flegrei volcanic area - Southern Italy(1985)
; ; ; ; ;Del Pezzo, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;De Natale, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Scarcella, G.; University of Naples ;Zollo, A.; University of Naples; ; ; A frequency dependence quite different from that evaluated in active tectonic regions was found for coda attenuation.271 25 - PublicationRestrictedSEISMIC CODA-Q AND SCALING LAW OF THE SOURCE SPECTRA AT THE AEOLIAN ISLANDS, SOUTHERN ITALY(1983-02)
; ; ; ; ;Del Pezzo, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Ferulano, F.; ENI E&P Division ;Giarrusso, A.; University of Naples ;Martini, M.; ; ; The model developed by Aki and Chouet for the coda wave generation and propagation has been used to calculate the quality factor Q for the zone of the Aeolian Islands, southern Italy, in the frequency range of 1 to 12 Hz, and the scaling properties of the seismic spectrum in the magnitude range of 0.4 to 4.7. The Q found for the Aeolian area has a frequency dependence of the form Q = qf v. The absolute values of Q seem to be dependent on the station and location of the seismic events, confirming the strong lateral heterogeneities in the geological structure beneath the Aeolian Arc. A temporal variation has been noted in the Q calculated at Vulcano station (VPL) in a period of 3 weeks soon after the occurrence of a main shock of M, -- 5.5 located near the station. The scaling behavior of this sequence is similar to that obtained in two areas of California and one portion of Japan, with a corner frequency that remains constant with an increasing seismic moment between magnitudes 1 and 4. It differs substantially from the scaling properties of the Hawaian earthquakes that show a linear pattern, without an increase of the stress drop with magnitude. The fact that Vulcano is an active volcano seems not to influence the scaling properties of the seismic sequence localized very near it. It probably indicates that the aftershocks used for calculating the scaling law are generated out of the volcanic complex Lipari-Vulcano, in a zone with a good capability of accu- mulating the stress.289 34 - PublicationOpen AccessERUPTIVE HISTORY, SEISMIC ACTIVITY AND GROUND DEFORMATIONS AT MT VESUVIUS, ITALY(1985)
; ; ; ; ; ;Bonasia, V.; University of Naples ;Del Pezzo, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Pingue, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Scandone, R.; University of Rome III ;Scarpa, R.; University of Salerno; ; ; ; We describe the eruptive history and seismicity and ground deformation of Mt. Vesuvius in the time interval 1970-1982368 677