The early April earthquake of magnitude 8.6 that shook Sumatra (Indonesia) was a grim reminder of the devastating earthquakes and tsunami that killed tens of thousands of people in 2004 and 2005. Now a new study shows that the residents of that region are at risk from yet another potentially deadly natural phenomenon -- major volcanic eruptions. This is a syndicated post, which originally appeared at ScienceDaily: Natural Disaster News. View original post. May 16, 2012.