Indonesia's Mount Kelud volcano spews ash in East Java province in this picture taken November 4, 2007. The head of Indonesia's Centre for Vulcanology and Geological Hazard Mitigation Surono and his colleagues are keeping a close eye on Mount Kelud, which is particularly hard to monitor because of its crater lake. No fewer than four volcanoes have suddenly rumbled to life in the past month. Picture taken November 4, 2007. TO MATCH FATURE INDONESIA-VOLCANO/SCIENTISTS REUTERS/Indonesian Meteorology and Geophysical Authority/Handout (INDONESIA). EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS.