PVMBG reported that during 5-11 August phreatic events at Tangkubanparahu’s Ratu Crater continued to produced sometimes dense, gray-to-white plumes that rose as high as 200 m above the vent and ash plumes rose as high as 100 m. The emissions were accompanied by roaring. Ashfall was localized around Ratu Crater. The seismic network recorded continuous tremor. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay 1.5 km away from the active crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)