SOUTHERN ITALY NOVEMBER 23,1980 EARTHQUAKE MACROSEISMIC SURVEY

tHE intervention of the "noninstrwnental observation" sector of tbe Progetto Finalizzato Geodinamica (P.F.G., Geodynarnic Oriented Project) foll. owing the earthlluake in Southern Italy on November 23, 1980, began tI,'0 days after the event and developed into two pha.se:;!, d'irected respectively tù",'3.;:-J.~ the rnacroseismic classification 01' the area hit b~' the disastrous effects (X-VII degrees on the MSK scale) and towards t'he classification of the effects felt in areas farther from the epicenter (VII-II degrees OD the MSK scale) . In organizing the intervention, particul~r attention was placed ontò~ g[·.thering of elementary information regarding the geomorphologic situation, believed useful for the construction of a Ioeal model. of earthquake-territQ ry interaction; that i8, a model capab.1.e 01' justifying the loeal effects, which in numerous caSeS hae a preponderant role. (CNR/PFG, 1981; P05tpi~chl, 1981) . Porty researchers with mul~iai5ciplinary skil1s (seismologists, geologists and structural engineers) were employed in the first phase of the proj ect (Po~tpischl et al., )981 a,b). Divided lnto eigbt groups, they operated in the area where the effects re5ulted more severe than those corresponding t o the VI ùegree on the MSK scale. Four of the groups were lTlvolved in the identification of the limits of the area in whi ch the eff<::cts can be cl.ass.if i ed as not inferior to the VIII degree of the M2K scale. Tbree of the groups were instead involved in rnodelling, in a first a~ prc-ximation, the area where the damage first took pIace, that i s, tne zones hi t by effects not infe~'ior to the VI degree on the MSK sc aIe. The last group was involved in a survey of the meizoseismal area.