Indonesia: Indonesias Mount Semeru erupted Friday morning, generating a pyroclastic flow that moved as far as 4.5 kilometres.According to Antara News Agency, the mountains Observation Post officer Mukdas Sofian said the eruption, which occurred at 7.21am local time, also emitted white to grey ash plume that rose about 1,000 metres above the summit.Mount Semeru, the highest volcano on Java Island, remains at Level III (Alert) status.