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Authors: Alparone, S.*
Gambino, S.*
Title: High precision locations of multiplets on south-eastern flank of Mt. Etna (Italy): reconstruction of fault plane geometry
Title of journal: Physics of the Earth and Planetary Interiors
Series/Report no.: 135 (2003)
Publisher: Elsevier
Issue Date: 2003
Keywords: Waveform correlation
Abstract: On 9, January 2001 a seismic swarm, located on the south-eastern flank of Mt. Etna and with nearly identical waveforms, caused some damage to Zafferana Etnea village, 3 km from the epicentral area. An analysis of the seismicity occurring in the last 8 years in this area has revealed other earthquakes with the same characteristics; some pre-empted and followed (up to a few months) the 2001 January swarm, others were recorded more than five years beforehand. Using similarity of waveforms, these earthquakes were classified into three families. The use of a multiplet-technique has allowed to obtain the spatial distribution of the events with higher precision (mean error of 10-20 meters) with respect to traditional localization techniques. Mt. Etna earthquakes relocation clearly describes the geometry of the seismogenic tectonic structure; the hypocenters lie on a NE-SW oriented plane that is coincident with one of the focal planes obtained by first-arrival polarities. This alignment is also coherent with one of the main regional tectonic trends cutting the Mt. Etna area, and can be interpreted as a right-lateral strike seismic source on the south-eastern flank of Mt. Etna, distant from eruptive centres, which repeats from time to time and is able to produce strong energy releases.
Appears in Collections:Papers Published / Papers in press
05.02.02. Seismological data

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