Lying on the Ring of Fire, Indonesia experiences a high frequency of earthquakes and is home to 127 active volcanoes. One such volcano is Anak Krakatau (Child of Krakatau) in the Sunda Strait, which emerged in 1927 from the caldera left by the 1883 eruption of Krakatoa, one of the most violent eruptions in recorded history. That eruption, through tsunamis and ash fall, killed more than 36,000 people, many of whom lived in the same regions where the 2018 tsunami struck.