Mayon volcano
AP
Feb. 26, 2014 file photo, smoke billows from the crater of Mayon volcano, one of the country's most active volcanoes, in Albay province about 550 kilometers southeast of Manila, Philippines. The Philippines' most active volcano has belched out lava fragments as big as a bus that rolled one kilometer (half a mile) down its slope, prompting authorities to start forcibly evacuating thousands of villagers, officials said Tuesday, Sept. 16, 2014. (AP Photo/Bullit Marquez, File)