L'arcipelago delle Filippine sorge nell'Anello del Fuoco, una catena di vulcani che cingono l'Oceano Pacifico

(EPA/NASA)

A NASA Earth Observatory handout photo released 16 december 2009 showing an aerial view of Mayon Volcano, Philippines. Tens of thousands of people living within the danger zone of Mayon Volcano in the Philippines were forced to evacuate to emergency shelters in mid-December 2009 as tremors, incandescent lava at the summit, and minor ash falls suggested a major eruption was on the way. On the evening of 14 December 2009, the local volcano observatory raised the alert level to Level 3, which means ‘magma is close to the crater and hazardous explosive eruption is imminent.’