Fig.1 Sections of the stalagmites taken from the "Buco dei Buoi" cave in 1978,
and from the "Spipola" cave in 1950 showing the growth axes. For each
stalagmite, the dates(rounded boxes) indicate the relative dating resulting from the
assumption that the marketed discontinuities are a consequence of the January 3, 1117,
earthquakes. The corresponding earthquake catalogue dates are also indicateed(retangular
boxes).