GNGTS 2013 - Atti del 32° Convegno Nazionale

b. Rise in temperature, gas emission and death of fish, frogs and fresh water shrimps: sometimes we have recorded an increase in the water temperature of Biglione creek and an emission of warm and dangerous gas (radon, sulphurous gasses, hydrocyanic anhydrite, ozone..) that caused fish deaths. For example, three days before the two earthquakes of M = 4.6, 19:14 LT, and M = 4.8, 19:15 LT, both occurred the August 21 st , 2000, in the provinces of Asti and Alessandria, it was reported in Torre Pellice the death of all fishes in a little artificial lake fed by the Biglione creek, whose temperature increase was of 6 °C, temperature recorded in the night. Also some frogs and fresh water shrimps died near the Biglione. c. Zeolite in white dust and dehydration action on biological structures, the oxidative phenomena on gneiss surfaces parallel to the ground: before earthquakes of magnitude ≥4 and epicentrum distance ≤100 km a white dust, containing zeolite, came out from rock cracks, near Biglione, not too far from mines on Vandalino. The dehydrating action of zeolite was deadly to Limacidae and to earth-worms. We suppose that also the oxidative phenomena on gneiss surfaces parallel to the ground can give problems to biological structures. Conclusions. Even if Valle Pellice is a moderate seismic area, we can observe several phenomena regarding unusual animal behaviours and human diseases. The comparison “a posteriori” with local seismic activity can be resumed in the following points: • unusual animal behaviours are reported a few days before a seismic event, contempora- neously to the magnetic sudden commencement; • a particular tripartite sequence of vocal language of animal was noted: Phase A, lasting up to 2 hours, 0.5-10 hours before moderate, local seismic activity; phase B characterized by the absence of alarm calls and finally phase C immediately before (20-40 seconds) the seismic shock characterized by alarm signals probably associated to particular infra- sound emission; • oxidative phenomena on plant structures and on ferromagnetic rocks, occurring along gneiss surfaces parallel to the ground; • dust deposition, especially alluminates, silicon-alluminates, zeolites; • gas emission, especially sulphurous gas, hydrocyanic anhydrite, ozone, deduced by the olfactory perception of people living in the countryside; • increased emission of Radon 222 in the air above average values (α particles), and an increase of β and γ emission before the seismic shocks; • variation in the pH values of water, on meadows and in rivers; • variations in the magnetic declination and magnetic intensity; • rise in the temperature in the subsoil contemporaneously to increased radon and gas emission. Statistics of early strange behaviours in dogs and cats confirm previous results obtained from other observations, in this case it can be stated very precisely that the average warning time is about 6 hours. In contrast to past results, a little magnitude dependence occurs for small earthquakes. These particularities are probably due to the way of collecting information, which permits observations from a restricted area to be correlated to small local seismic activity, contrarily to data relative to strong earthquakes from other regions of the world. The observations described, also in case of small earthquakes, regard areas near mines, near the top of Mount Vandalino. Scientific knowledge of pre-seismic phenomena is still in its infancy. Certainly, unusual animal behaviours can give a significant contribution to increase the sensibility to environmental changes. Acknowledgements. Angelo Agostino, Alberto Carpinteri, Giulio Fanti, Giampaolo Giuliani, Francesco Lattarulo, Giovanni Martinelli, Lisa Pierotti, Riccardo Sandrone, Alessandro Vaio, Paolo Volpe. 65 GNGTS 2013 S essione 2.1