Mount Dukono, located on Indonesia's Halmahera Island, erupted on June 23, spewing 1,600 meters of volcanic ash into the sky.

According to the Geological Agency, Mount Dukono is now ranked as the fourth most active volcano in Indonesia.

Rescue teams in Indonesia are racing to locate a Brazilian tourist who vanished after falling during a hike near the crater rim of Mount Rinjani, an active volcano on the island of Lombok.Juliana ...