50,000 Earthquakes in 3 Weeks Shook Volcano Awake

Volcanoes are amazing: explosions, rocks flying up high, lava rivers flowing down the slopes, clouds of ash filling the air. There're about 1,500 potentially active volcanoes on Earth and we're already watching 19 of them closely. They might explode awake any minute... Like the volcano in Iceland that suddenly woke up after 800 years!