Indonesia's Mount Anak Krakatau continues to show signs that it may be ready to erupt.
The volcano began to spew ash, and now an alert is raised to the second highest level. It is known as the "Child of Krakatau" because it was gradually formed after its "parent" blew up in 1883.
This was one of the most famous eruptions in history.
Tourists have been warned to stay away from the popular attraction as long as it spews ash.