The Maninjau caldera was formed by a volcanic eruption estimated to have occurred around 52,000 years ago. Deposits from the eruption have been found in a radial distribution around Maninjau extending up to 50 km to the east, 75 km to the southeast, and west to the present coastline. The deposits are estimated to be distributed over 8500 km2 and have a volume of 220�250 km3. The caldera has a length of 20 km and a width of 8 km
