One of the most significant volcano disaster we must know is 1985 Nevado del Ruiz volcano eruption. Approx.23000 citizens in Armero city were dead. The cultural aspects were embedded in this disaster. The disaster was predicted. The hazard mapｓ indicated the city would be affected by the volcano eruption and lahars. The both, priest and mayor, told the citizens to stay in the same place because they were afraid of panic before the time, did not tell them to evacuate. That made tragedy. The people in the city tended to follow the both persons because of the culture, a religious and vertically‐structured society. There were also other factors*.