The Earth’s outer shell (lithosphere), is divided into large tectonic plates. These move slowly due to pressure from the underlying hot mantle. There are 7-8 major plates and many minor plates. Activity such as earthquakes and volcanoes happen along plate boundaries.
Mt. Tambora is on the Eurasian and Australian plates. These two plates are moving towards each other (convergent).
Mt. Tambora is on the Eurasian and Australian plates. These two plates are moving towards each other (convergent).