Context: Recently, Mount Ibu erupted again, sending ash 4 km high, as streaks of purple lightning flashed around its crater.
Mount Ibu
o Recently Sulawesi's Ruang volcano has erupted.
o Marapi volcano, one of Sumatra's most active volcanoes has also erupted recently.
o It is located in a subduction zone, where the Indo-Australian plate subducts under the Eurasian plate.
Indonesia
o It is an archipelago that lies across the Equator and spans a distance equivalent to one-eighth of Earth’s circumference.