A farmer uses a wooden stick to clean ash from Mt Sinabung Mountain from his onion plantation at Payung village in Karo district, Indonesia's North Sumatra province, January 9, 2014. About 20,000 villagers have been evacuated since authorities raised the alert status for Sinabung to the highest level in November 2013, local media reported on Monday. REUTERS/Beawiharta (INDONESIA - Tags: DISASTER ENVIRONMENT)