BNPB reported intense activity at Sinabung on 2 August; between 0800 and 1200, pyroclastic flows were generated 17 times and traveled as far as 4.5 km ESE.
Ash plumes rose up to 4.2 km above the crater and drifted S, causing ashfall in local areas including Perbaji (4 km SW), Sukatendel, Temberun, Perteguhen (7 km ESE), Kuta Rakyat (5 km NE), Simpang Empat (7 km SE), Tiga Pancur (6 km SSE), Selandi (5 km SSW), Payung (5 km SSW), and Kuta Gugung (5 km N).
Significant ashfall was noted in Ndokum Siroga (9 km ESE), Gajah (8 km E), and Naman Teran (5 km NE).
BNPB noted that there were 2,038 families (7,214 people) displaced to eight shelters, and an additional 2,863 people living in refugee camps.
Based on PVMBG observations, webcam and satellite images, and wind data, the Darwin VAAC reported that during 6-7 August multiple ash plumes rose as high as 5.5 km (18,000 ft) a.s.l.
and drifted ENE, E, and SE.
The Alert Level remained at 4 (on a scale of 1-4), with an exclusion zone of 7 km from the volcano on the SSE sector, and 6 km in the ESE sector, and 4 km in the NNE sector.
Sources: Badan Nacional Penanggulangan Bencana (BNPB) ,Darwin Volcanic Ash Advisory Centre (VAAC),Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)