indonesia Geology

Technically, Much of Indonesia's area is highly unstable, making it a place prone to volcanoes and frequent earthquakes. The Indo-Australian plate and the Pacific plate lie on the Pacific Ring of Fire, subducting under the Eurasian plate and melting about 100 km (62 mi). Sumatra Java Volcanoes running through Bali and Nusa Tenggara; It then travels northeast from Sulawesi to the Banda Islands. About 130 of the 400 volcanoes are active. Between 1972 and 1991, the volcano erupted 29 times, mostly in Java. Volcanic ash can make agricultural conditions unpredictable in some areas. However, It also resulted in fertile soils, a factor that sustained Java and Bali's historically high population density. Around 70,000 BC, a massive supervolcano erupted at present-day Lake Toba. This is believed to have caused a global volcanic winter and climate cooling, which later caused genetic bottlenecks in human evolution, although this is still debated. The 1815 eruption of Mount Tambora and ...