Investigation of pre-1700 Earthquakes Between the Adda and the Middle Adige River Basins (Southern Alps) - Historical Seismology: Interdisciplinary Studies of Past and Recent Earthquakes - page 115

Fig. 15 Location of the main effects of the 1046 earthquake according to Guidoboni and Comastri
(2005)
segment about 80 km long (Fig. 15); the main effects (I 9 MCS) are referred to a
point in the middle of the Adige valley, corresponding to the area of Rovereto.
3.6.2 Adige Valley: Archaeoseismological Evidence
Archaeoseismological data suggest that a destructive event occurred during the An-
tiquity in the Adige Valley. In 1997, archaeological excavations in the village of
Egna-Neumarkt uncovered remains (edifice along the road Claudia Augusta Padana)
showing evidence of a destructive event. The destruction occurred in the half of the
3rd century AD (Galadini and Galli, 1999; Di Stefano, 2002). Moreover, an evident
displacement of the foundations was observed (about 0.6 m of vertical motion; about
0.3 m of dextral strike-slip motion). The walls were displaced by at least four shear
planes striking NNE-SSW, i.e. parallel to the main faults having the “Giudicarie
trend” in this sector of the Adige Valley. Moreover, the paleoseismological inves-
tigation, made by means of excavations down to 7 m depth, indicated that another
displacement event had struck the site after 2581-2197 BC (calibrated radiocarbon
age, 1 sigma). In the whole, the gathered data suggested a seismic origin for the
destruction. Indeed, the stratigraphy derived from four boreholes and the geomor-
phological investigation permitted to exclude alternative causes such as differential