GNGTS 2013 - Atti del 32° Convegno Nazionale

Iasolino Giulio (1588). De’ rimedi naturali che sono nell’isola di Pithecusa hoggi detta Ischia. Lacco Ameno d’Ischia, 2000. IMAGAENARIA, pp. XXVII+342. ING-SGA (1995). Catalogo dei forti terremoti in Italia dal 461 a.C. al 1980. A cura di E. Boschi, G. Ferrari, P. Gasperini, E. Guidoboni, G. Smriglio & G. Valenzise, Istituto Naz. di Geofisica - SGA storia geofisica ambiente. Ozzano Emilia, pp. 973 con allegato CD-ROM 1. Mastino F. (in preparazione). Catalogo dei terremoti dell’Isola d’Ischia. Mercalli G., (1885). L’Isola d’Ischia ed il terremoto del 28 luglio 1883. Mem. R. Ist. Lombardo di Sc. e Lett., 15 (2) (6 della s. III), 99-154. Milano. Molin D., Bernardini F., Camassi R., Caracciolo C.H., Castelli V., Ercolani E., Postpischl L. (2008). Materiali per un catalogo dei terremoti italiani: revisione della sismicità minore del territorio nazionale. Quaderni di Geofisica, 57, 78 pp. (CD-Rom, 1444 pp.) Palmieri L. & Oglialoro A., 1884. Sul terremoto dell’isola d’Ischia della sera del 28 luglio 1883. Estratto Atti Acc. Sc. fis. e mat., s. 2a, 1(4), pp. 1-28. Pontano Giovanni (1509). De Bello Neapolitano. Napoli, Mayr, pagine non numerate. Riccardo da San Germano [Ryccardi de Sancto Germano] (1937). Cronica. In: Raccolta degli storici italiani dal cinquecento al millecinquecento ordinata da L.A. Muratori. N. ed. riveduta ampliata e corretta con la direzione di G. Carducci – V. Fiorini – P. Fedele, Tomo VII, P. II, pp. 1-219. R. Ist. Storico Italiano per il Medio Evo. SSN - Servizio Sismico Nazionale (1998). Il terremoto del 28 luglio 1883 a Casamicciola nell’Isola d’Ischia. Istituto Poligrafico e Zecca dello Stato, Roma, pp. 333. Tortora Alfonso (1991). Per una storia dei terremoti nella Campania del ‘500. In: Atti “Colloquio sulle scienze della terra in onore di Nicola Covelli” – Caiazzo 27 maggio 1989, a cura di Antonio Pozzuoli. Associazione Storica del Caiatino, vol. 8, pp. 67-73. Napoli, Arte Tipografica. Characteristics of high frequency ground motions in the Maule region (Chile), obtained from aftershocks of the 2010 M w 8.8 earthquake I. Munafò 1 , L. Malagnini 1 , R. B. Herrmann 2 1 Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy 2 Saint Louis University, St. Louis, MO, United States Introduction. The M w 8.8 Maule earthquake occurred about 3 km off the coast of the central Chile on 2010 February 27 at 03:34 local time (06:34 UTC) with intense shaking lasting for about three minutes and it was followed by thousands of aftershocks. The earthquake took place along the boundary between the Nazca and South American tectonic plates, at the location where the Nazca plate is subducting beneath the South America tectonic plate at a rate of about 74 mm/yr. The subduction zone event caused severe ground shaking across a 660 km swath of the country and generated a tsunami that ravaged the coastline. Chile is located on a convergent plate boundary that generates maga-thrust earthquake since the Paleozoic era (500 million years ago). In fact, based on the historical record, the Chilean coast has suffered many mega-thrust earthquakes along this plate boundary, including the strongest earthquake ever measured (1960 Valdivia earthquake, M 9.5). The segment of the fault zone that ruptured in this earthquake was estimated to be over 700 km long with a displacement of almost 10 meters. It lays immediately north of the 1000 km segment that ruptured in the great earthquake of 1960. This study uses a data set consisting of 172 aftershocks of the M w 8.8 Maule earthquake recorded by more than 100 temporary broadband stations deployed between March 2010 and January 2011 (Fig. 1). Each of these earthquakes use the relocations performed for National Earthquake Information Center (NEIC) and is characterized by a well-constrained focal mechanism and moment magnitudes in the range M w 3.7 to 6.2. The RMTs were determined using the WUS velocity model (Herrmann et al. , 2011). Most of these earthquakes are characterized by shallow, eastward-dipping, thrust-type focal mechanisms consistent with faulting at or near the plate interface. 88 GNGTS 2013 S essione 1.1