About Hunga-Tonga volcano:
- Hunga Tonga–Hunga Haʻapai is a volcanic island in Tonga.
- It is located about 30 km south of the submarine volcano of Fonuafoʻou and 65 km north of Tongatapu, the country's main island.
- The volcano is part of the highly active Tonga–Kermadec Islands volcanic arc, a subduction zone extending from New Zealand north-northeast to Fiji.
- The island arc is formed at the convergent boundary where the Pacific Plate subducts under the Indo-Australian Plate.
- It is along with the caldera rim of a much larger submarine edifice in the western South Pacific Ocean.
- It has erupted regularly over the past few decades.
What is a volcano?
- It is an opening on the surface of a planet that allows material warmer than its surroundings to escape from its interior.
- When this material escapes, it causes an eruption, which can be explosive in nature.
