January 22, 2013 – NEW ZEALAND – Volcanic activity at White Island is the most “vigorous” in years and could mean a large explosive eruption is imminent, GNS Science says. The volcano, off the Bay of Plenty coast, is the country’s most active and showed heightened signs of unrest last year. But it is the increased hydrothermal activity in the last three weeks which is of “significant concern,” GNS vulcanologist Brad Scott says. “I don’t think I’ve seen anything this strong since the late 90s and 2000s.” The activity then led to a large eruption in July, 2000. “The hydrothermal activity is some of the most vigorous I have seen at White Island for many years. This type of activity usually leads to stronger volcanic activity and is a significant concern,” Scott said. “Increases in hydrothermal activity often leads to explosive eruptions and that can be quite dangerous…