* Krakatoa is an island arc volcano: This means it's formed by the collision of tectonic plates. The eruption location changes over time as the plates move and magma rises in different places.
* Krakatoa is a caldera: This is a large depression formed when a volcano collapses after a massive eruption. The 1883 eruption, the most famous, emptied the magma chamber beneath the island, causing it to collapse and form a caldera.
* The 1883 eruption: This eruption occurred at the summit of the main island, Rakata. This island was part of a larger island complex that was destroyed in the eruption.
* Modern Anak Krakatoa: Today, a new volcano, Anak Krakatoa, meaning "Child of Krakatoa", is forming within the caldera of the 1883 eruption. This is where modern eruptions originate.
So, while the 1883 eruption specifically happened on Rakata, the broader area where Krakatoa erupts is the Krakatoa caldera, which is constantly changing.
