GNGTS 2016 - Atti del 35° Convegno Nazionale

GNGTS 2016 S essione A matrice 71 Marzorati S., Carannante S., Cattaneo M., D’Alema E., Frapiccini M., Ladina C., Monachesi G. and Spallarossa D.; 2012: Automated control procedures and first results from the temporary seismic monitoring of the 2012 Emilia sequence . Annals of Geophysics, 55, 4. doi:10. 4401/ag-6116. Mazza S., Basili A., Bono A., Lauciani V., Mandiello A.G., Marcocci C., Mele F.M., Pintore S., Quintiliani M., Scognamiglio L. and Selvaggi G.; 2012: AIDA – Seismic data acquisition, processing, storage and distribution at the National Earthquake Center, INGV . Annals of Geophysics, 55 , 4. Doi:10.4401/ag-6145. Moretti M., Margheriti L., Govoni A.: 2016: Rapid response to earthquake emergencies in Italy: temporary seismic network coordinated deployments in the last five years . In: D’Amico S. (Ed): Earthquakes and their impacts on Society, Springer, 585-599. doi. 10.1007/978-3-319-21753-6_24. Pondrelli et al.; 2016: Pianificazione e gestione di un’emergenza sismica: esercitazione INGV del 26 novembre 2015 effettuata nell’ambito della Linea di Attività T5 “Sorveglianza sismica e operatività post terremoto”. Quaderni di Geofisica, in press. Scafidi D., Spallarossa D., Turino C., Ferretti G., Viganò A., 2016; Automatic P-and S-Wave Local Earthquake Tomography: Testing Performance of the Automatic Phase-Picker Engine RSNI-Picke r. Bulletin of the Seismological Society of America, doi:10.1785/0120150084, 106 , 2, 526-536. Coseismic ground ruptures related to the 2016 Amatrice earthquake: geological survey by EMERGEO Working Group EMERGEO W.G.: S. Pucci 1 , P.M. De Martini 1 , R. Civico 1 , R. Nappi 1 , T. Ricci 1 , F. Villani 1 , C.A. Brunori 1 , M. Caciagli 1 , V. Sapia 1 , F.R. Cinti 1 , M. Moro 1 , D. Di Naccio 1 , S. Gori 1 , E. Falcucci 1 , R. Vallone 1 , F. Mazzarini 1 , S. Tarquini 1 , P. Del Carlo 1 , V. Kastelic 1 , M. Carafa 1 , R. De Ritis 1 , G. Gaudiosi 1 , R. Nave 1 , G. Alessio 1 , P. Burrato 1 , A. Smedile 1 , L. Alfonsi 1 , P. Vannoli 1 , M. Pignone 1 , S. Pinzi 1 , U. Fracassi 1 , L. Pizzimenti 1 , M.T. Mariucci 1 , N. Pagliuca 1 , A. Sciarra 1 , R. Carluccio 1 , I. Nicolosi 1 , M. Chiappini 1 , F. D’Ajello Caracciolo 1 , G. Pezzo 1 , A. Patera 1 , P. Montone 1 , R. Azzaro 1 , D. Pantosti 1 , M. Saroli 2,1 , L. Lo Sardo 2,1 , M. Lancia 2 1 Istituto Nazionale di Geofisica e Vulcanologia, Italy 2 University of Cassino and Southern Lazio, Italy Introduction. On August 24, 2016 (01:36 GMT) a Mw 6.0 normal faulting earthquake struck central Italy causing 298 fatalities and heavy damage in several historical towns (among others, Amatrice, Arquata del Tronto, Accumoli, Pescara del Tronto), (AMA_LOC Working Group, 2016). About 1 hour later, a Mw 5.4 earthquake occurred about 10 km further north, east of Norcia, at a depth of 8.1 km (Fig. 1). Focal mechanisms of the two main events show NW-SE trending normal faulting (Fig.1). The seismic sequence was confined within the upper 10 - 12 km of the crust and the volume affected by the aftershocks strikes NW-SE for about 50 km in length and 15 km in width. This area of the central Apennines is characterized by a Quaternary extensional regime overprinting NE-verging thrust-sheets (i.e. Vai andMartini, 2001 and references therein), mostly made of Meso-Cenozoic carbonate rocks and Miocene flysch deposits. The resulting dense array of NW-SE and NNW-SSE striking, mainly SW- dipping, up to 30 km-long active normal fault systems (Galli et al. , 2008 and references therein; Fig. 1) accommodates the present-day 2-4 mm/yr regional NE-SW extension (D’Agostino et al. , 2011, and references therein). Following the mainshock on August 24, the EMERGEO Working Group (http://emergeo. ingv.it/ ) activated immediately in order to perform mapping of surface coseismic effects. In this paper we present data collected in the field and a first analysis of the observed coseismic features. Field activity. The EMERGEO Working Group activated for surveying all the coseismic effects visible at the surface, both those possibly correlated to the earthquake rupture (like e.g. surface faulting and fracturing) and the ones due to earthquake shaking (e.g. landslides, rock