Volcanoes emit a broad spectrum of sonic energy. In the case of basaltic eruptions, most of that acoustical energy in the infrasound range. A new study reveals that this low-frequency sound can give scientists an enhanced understanding of the behavior of volcanoes and a tool to monitor the lifecycles of their eruptions. This is a syndicated post, which originally appeared at ScienceDaily: Natural Disaster News. View original post. May 8, 2012.