A leading Greek seismologist warned that the volcano in Nea Kameni islet in the Aegean Sea has been activated since late January.Speaking to the In.gr news outlet, Panagiotis Papadimitriou, an emeritus professor of seismology at the University of Athens, said the activation so far hasn't led to seismic activity, but the scientists remain on yellow alert.According to him, the seismic activity in the area of Santorini will either weaken or lead to an earthquake of 6 to 6.3 magnitude on the Richter scale, which is not forecasted to cause a serious impact on the surrounding islands as the distance from...