PVMBG reported that during 28 September-4 October the lava dome in Merapi?s summit crater continued to slowly grow.
By 4 October the volume of the lava dome was an estimated 135,000 cubic meters, and the growth rate was 1,000 cubic meters per day (similar to the previous week).
White emissions of variable density rose a maximum of 75 m above the summit.
The Alert Level remained at 2 (on a scale of 1-4), and resident were warned to remain outside of the 3-km exclusion zone.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)