Low frequency events at Mt. Etna: some problems and open questions

S. Alparone, S. Gresta


A short period seismic array setting at Mt. Etna symmetrically in regard to the fracture of the 1991-1993 eruption allowed an analysis of low frequency events which occurred in the first phase of the mentioned eruption. We recorded about 50 events, 19 of them belong to a family. They show very low amplitude values and spectral peaks ranging 0.5-4.5 Hz. The evidence of this family of events shows how the process driving the dynamics of the fluid in the volcano is often the same.


Mt. Etna;low frequency volcanic events;earthquake family;polarization

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DOI: https://doi.org/10.4401/ag-3971
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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X