While authorities have warned people not to come within 4km of Mount Dukono’s crater, the lack of an official ban means many climbers still make the trek. JAKARTA: Indonesian tour guides say the hike up Mount Dukono carries risks, with some refusing to take guests who do not understand the dangers of active volcanoes.  Mount Dukono erupted on Friday (May 8), sending an ash cloud about 10km into the air.  Twenty hikers, including Singaporeans , were caught in the eruption on Halmahera island in