Gunuang barapi paliang gadang adolah Gunuang Toba dalam 100 km x 30 km Danau Toba, nan tabantuak sasudah runtuahnyo kaldera (dipakirokan 74.000 taun silam) [2] Erupsi dipakirokan ado pado level salapan manuruik skala VEI, kamungkinan paliang gadang untuak erupsinyo.
The largest volcano of Sumatra is the supervolcano Toba within the 100 km (62 mi) × 30 km (19 mi) Lake Toba, which was created after a caldera collapse (est. in 74,000 Before Present).[2] The eruption is estimated to have been at level eight on the VEI scale, the largest possible for a volcanic eruption.