SPAIN — Buried in ash: Ash from a volcano covered a house on the Canary island of La Palma, on Monday. Scientists estimated the volcano had ejected over 10,000 million cubic meters of ash. The ash is jettisoned thousands of meters into the sky, but the heaviest, thickest particles eventually give way to gravity. They accumulate into banks that slowly cover doors, pour into windows, and make rooftops sag. Some particles are so big that when they pummel a car roof or the fronds of a banana tree, it sounds like hail. Photo: Emilio Morenatti/AP