Bosi (1975)
Within a systematic analysis of faults of the central Apennines, Bosi 
ranks as "probably active" a few small (<6 km) NW-trending faults 
located on the northeastern side of the Monti della Meta.

Console et al. (1984)
These investigators provide a preliminary determination of 
hypocentral parameters of the seismic sequence that began on 7 
May 1984. They observe that the spatial distribution of aftershocks 
exhibits a N-S trend, in agreement with the elongation of the 
isoseismals drawn for the 7 May mainshock. Based on macroseismic 
and instrumental evidence, these authors also hypothesise that the 
earthquake involved the rupture of a N-S tectonic trend.

Branno et al. (1985)
This paper supplies an assessment of the intensities of the 7 May 
mainshock based on field investigations and macroseismic 
questionnaires. They observe that all the isoseismals between the V 
and VII intensity degree are elongated in the direction of the Piana 
Campana. They calculate the attenuation coefficient in three 
directions and suggest that the low value towards the Piana 
Campana is a result of local site geological conditions.

Del Pezzo et al. (1985)
This paper supplies a preliminary analysis of the aftershocks of the 
May 1984 sequence based on data gathered with a portable digital 
seismic network. This network has been operating for ten days 
starting 24 hours after the mainshock. About 1,000 events have 
been analysed; the 311 best located events (standard error on the 
hypocentral location less than 2 km) have been selected for further 
analyses. The hypocentral depth ranges between 5 and 15 km. The 
epicentral distribution is characterized by a complex geometry 
arising from the presence of a cluster oriented NE-SW, that is, 
perpendicular to the expected trend of the main rupture.

Westaway et al. (1989)
Based on seismological and field studies of the 1984 Lazio-Abruzzo 
earthquakes,  these investigators provide constraints on the 
Quaternary kinematic evolution of the central Apennines. They 
estimate new focal mechanisms for the two principal events of the 
May 1984 sequence; these exhibit a range of source orientations but 
are all consistent with a slip vector trending 225. Westaway et al. 
contend that the first-motion and the waveform-modelling focal 
solutions differ because rupture occurred on a fault with variable 
strike. They also suggest that the two events occurred on part of the 
Monte Greco normal fault segment, where the strike of the Sangro 
fault changes abruptly East of Villetta Barrea. Both events have a 
centroid focal depth of ~10 km, the aftershock zone dips SW in the 
range 50 to 55, and the lower limit of seismic activity is 
located at about 12 km depth. Although the 1984 earthquakes did 
not generate surface faulting, on the basis of 10 m-high scarps seen 
along the Sangro fault these authors suggest an average Holocene 
slip rate of about 1 mm/y, concluding that the actual topography, 
their slip rate and their hypotheses for the geometry of this fault 
are consistent with the present-day extension rate across central 
Italy.

Galadini and Messina (1993)
These investigators contribute to delineating the neotectonic setting 
of the Upper Sangro Valley; in particular they seek to define the 
significance of Quaternary strike-slip faults within a regional 
structural context controlled by extensional movements. They also 
contend that all NW-SE-trending faults in the area are characterized 
by Quaternary left-lateral transtensional kinematics.

Miccadei (1993)
This worker suggests that the tectonic evolution of Marsica can be 
seen as the result of two distinct deformation events: a 
compressional phase characterized by thrusting with an eastward 
transport direction, and subsequently a new tectonic phase 
involving strike-slip along N-S, E-W and NE-SW preferential trends.

Boncio et al. (1998)
This paper presents a seismotectonic overview of the 7 May 1984 
earthquake and of its aftershock sequence. The authors remark that 
even if the CMT focal mechanisms for the main shock (M=5.8) and
 for the largest aftershock (M=5.2) point to a NNW-SSE trending 
extensional main seismogenic structure, aftershock epicenters are 
concentrated within a cluster oriented ENE-WSW with hypocentres 
aligned along a plane dipping about 60 to the SW (seen in a SW-NE 
section). They also point out that the anomalous distribution of the 
aftershocks appears to be controlled by two non-coaxial, but 
compatible, structures: the NNW-SSE trending, WSW-dipping Barrea 
normal fault, and the N100E-trending, SSW-dipping Valle del 
Sangro right-lateral normal-oblique fault. The aftershocks are 
clustered within the rock volume at the hanging-wall of both these 
faults, along the intersection between the two stuctures. In 
particular, the Barrea fault is interpreted as the main seismogenic 
fault, while the Valle del Sangro faults is assumed to have 
played the role of a transfer fault acting as a barrier for the 
northward propagation of the seismogenic rupture. 
