In the zone
Fox News said:Indonesian authorities raised the alert status for one of the country's most active volcanoes to the highest level Sunday after the mountain repeatedly sent hot clouds of gas down its slope following a series of eruptions in recent days.
Mount Sinabung in North Sumatra province unleashed fresh volcanic ash and gravel as high as 16,400 feet and searing gas down its slope up to 1.2 miles, said a government volcanologist, Surono, who like many Indonesians uses one name.
There is no permanent solution to this except, evacuation. Danger prone areas should be marked and prohibited. This, in itself, is a difficult task.
EDIT: Indonesian Volcano Keeps Erupting; On Highest Alert|Wall Street Journal|Updated November 25, 2013, 3:04 PM