I've been watching Arenal volcano in Costa Rica - and it's been busy! In the four days I was there last week, I saw two ash plumes like the one in the picture. Each night, the volcano glowed red - lava bombs the first night and lava flows the next two. Steam is constantly rising from the left crater at the summit. Periodically, the volcano booms as if a bomb is going off - loud enough to make you jump. This happens at any time, day or night, so I didn't get much sleep. But, it was worth it...!!!
