Blumetti (1995)
She reviews the historical descriptions of surface phenomena occurred in the 
Norcia-L'Aquila areas during the 1703 earthquakes sequence and compare them with 
field evidence with the aim of localising the surface ruptures related to 
seismogenic sources. The author concludes that surface ruptures are the result 
of the 14 Jan. I=IX MCS, and the 2 Feb. 1703 I=IX MCS, earthquakes. These 
ruptures occurred close to pre-existing normal faults bounding Meso-Cenozoic 
ridges that are part of a NNW-striking belt about 50 km-long and 5 km-wide, 
extending from Norcia to L'Aquila basins (see also IdSource=16, Norcia Source). 
In particular, she infers that the 2 Feb. earthquake surface ruptures occurred 
at three locations: 1) western side of Mt. Laghetto Ridge (Cittareale Fault, 
west-side down), 2) western side of Montereale basin (Montereale Fault, east-
side down), and 3) Rotigliano Plain (Rotigliano Fault, west-side down). Along 
Mt. Marine Ridge (Arischia Fault, west-side down) secondary effects occurred. 
Across the Arischia Fault area a foundation trench exposed a faulted 
stratigraphic sequence with at least two faulting events. The most recent 
occurred after 29,6901,110 yr B.P. and is responsible for the deposition of a 2 
meters thick colluvial wedge (expected MS=6.9); the previous one occurred 
between 186 kyr and 29,6901,110 y B.P.

Cello et al. (1997)
They observe that the epicentral area of the 1703 earthquake sequence coincides 
with the Norcia-L'Aquila fault set, that is the central fault set of the so-
called Central Apennines Fault System (CAFS). The CAFS is 
modelled by means of morphotectonic and structural investigations as a system of 
linked N-S trending left-lateral strike-slip faults, and from NNW to WNW-
trending transtensional and normal faults driven by a crustal, left-lateral, N- 
striking shear zone. The Norcia-L'Aquila fault set is divided into three main N-
S trending fault segments linked each other: the Norcia, Cittareale and L'Aquila 
ones.  According to these investigators (1998) the L'Aquila fault set includes 
Pizzoli Fault, the 15 km-long fault bounding the Pizzoli-L'Aquila basin to the 
north, and three other major N-S striking faults exposed to the west of 
L'Aquila. The activity of the Pizzoli Fault is testified in the Arischia area by 
faulted slope deposits and the occurrence of liquefaction phenomena during the 
1703 earthquake. The activity of the three major N-S striking faults is 
testified west of L'Aquila and south of Arischia by faulted and tilted slope 
deposits and faulted Quaternary fluvio-lacustrine deposits.

Cello et al. (1998)
To investigate further on the tectonic behaviour of the Norcia-L'Aquila fault 
set they develop a fractal analysis providing 1.22 as fractal dimension of the 
Norcia-L'Aquila set. They infer that this is an immature fault structure growing 
by localised strain within discrete fault sets.
