The eruption truncated the volcano into a broad shape with two peaks and a flat area  1.1 km wide with Alun-Alun crater in the middle, making the mountain appear as a twin volcano; one of the peaks is called Papandayan and the other Mount Puntang.
The volcanic eruption reshaped the mountain into a broad, two-peaked form with a flat expanse 1.1 km wide and Alun-Alun crater at its center, giving it a twin-volcano appearance; one peak is designated as Papandayan, while the other is Mount Puntang.