The Center for Volcanology and Geological Hazard Mitigation observation outposts reported high intensity ash falls on the slopes of Mt Merapi. At 23:51 a flash of smoke, hot air winds and flames as high as occurred to the west, north and to the east. The day's volcanic activity was very high, with sequential hot ash clouds erupting from the mountain. The alert level for the remained at level 4 and the official exclusion zone was a radius from the summit of Mount Merapi.