The aim of this work is to provide the results of the monitoring activity of the fracturing field developed during the seismic event occurred 48 hours after the short but intense flank eruption of Etna volcanic complex. The eruptive event was developed from SE crater base of Mt. Etna from 24 till 27 December 2018. The NNWSSE eruptive fracture represents the surface on the surface of the hydrofracture feeding system, which probably affected the entire structural frame of the Etna eastern flank, reactivating FiandacaPennisi shear zone [Monaco et al., 2010]. During the seismic swarm, the maximum magnitude (ML 4.9) was recorded at 3.19 AM, 2 km N away from Viagrande (CT) with a depth of 1.0 km [http://cnt.rm.ingv.it/event/21285011]. The fracturing field was recognized by geological maps [Monaco et al., 2010; Branca et al., 2011] and field survey, collecting the geometrical and kinematics parameters related to the shear segments. GEOmatic lab. The GEOmatic lab, assisted by the UniGeoCt students, have structured and defined along the deformation zone, the array of benchmarks belonging to UNICT network [De Guidi et al., 2018]. Our purpose is to evaluate postseismic deformation processes of 12th December 2018. The first measure has made on 12th December 2018; 4 benchmarks have been placed respectively in the southern and northern part of the system. Additional points and new geodetictopographic measurement will be done. The focus is to characterize the postseismic deformation processes and identify the real belt of FiandacaPennisi shear zone in order to provide further detailed information useful to the Civil Protection, INGV and University Institutions. References Branca S., Coltelli M., Groppelli G., Lentini F., (2011). Geological map of Etna volcano, 1:50,000 scale Italian Journal of Geosciences 130(3):265–291. De Guidi G., Scudero S., Gresta S., (2012). New insights into the local crust structure of Mt. Etna volcano from seismological and morphotectonic data. Journal of Volcanology and Geothermal Research 223224, 83–92. https://doi.org/10.1016/j.jvolgeores.2012.02.001. Monaco C., De Guidi G., Ferlito C., (2010). The morphotectonic map of Mt. Etna. Italian Journal of Geosciences 129, 408–428.

Monitoring of post-seismic deformation of the Fiandaca-Pennisi shear-zone (M. Etna volcano Sicily). The case of seismic swarm of 26th December 2018.

Fabio Brighenti;Francesco Carnemolla
;
Giorgio De Guidi
2019

Abstract

The aim of this work is to provide the results of the monitoring activity of the fracturing field developed during the seismic event occurred 48 hours after the short but intense flank eruption of Etna volcanic complex. The eruptive event was developed from SE crater base of Mt. Etna from 24 till 27 December 2018. The NNWSSE eruptive fracture represents the surface on the surface of the hydrofracture feeding system, which probably affected the entire structural frame of the Etna eastern flank, reactivating FiandacaPennisi shear zone [Monaco et al., 2010]. During the seismic swarm, the maximum magnitude (ML 4.9) was recorded at 3.19 AM, 2 km N away from Viagrande (CT) with a depth of 1.0 km [http://cnt.rm.ingv.it/event/21285011]. The fracturing field was recognized by geological maps [Monaco et al., 2010; Branca et al., 2011] and field survey, collecting the geometrical and kinematics parameters related to the shear segments. GEOmatic lab. The GEOmatic lab, assisted by the UniGeoCt students, have structured and defined along the deformation zone, the array of benchmarks belonging to UNICT network [De Guidi et al., 2018]. Our purpose is to evaluate postseismic deformation processes of 12th December 2018. The first measure has made on 12th December 2018; 4 benchmarks have been placed respectively in the southern and northern part of the system. Additional points and new geodetictopographic measurement will be done. The focus is to characterize the postseismic deformation processes and identify the real belt of FiandacaPennisi shear zone in order to provide further detailed information useful to the Civil Protection, INGV and University Institutions. References Branca S., Coltelli M., Groppelli G., Lentini F., (2011). Geological map of Etna volcano, 1:50,000 scale Italian Journal of Geosciences 130(3):265–291. De Guidi G., Scudero S., Gresta S., (2012). New insights into the local crust structure of Mt. Etna volcano from seismological and morphotectonic data. Journal of Volcanology and Geothermal Research 223224, 83–92. https://doi.org/10.1016/j.jvolgeores.2012.02.001. Monaco C., De Guidi G., Ferlito C., (2010). The morphotectonic map of Mt. Etna. Italian Journal of Geosciences 129, 408–428.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/367141
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