Ontake Volcano

The eruption of Mt. Ontake killed and injured many hikers. I'm really sorry for the victims. Unfortunately, no one predicted the eruption this time. I think it's hard to predict when and where there will be a eruption. 

According to the newspaper, there are about 100 active volcanos in Japan. Some volcanic mountains are popular sightseeing spots. To prevent another victims, authorities should announce the risk of visiting active volcano areas.