Photo taken on Aug. 10, 2021 shows Mount Merapi spewing volcanic materials as seen at Cangkringan in Sleman district, Yogyakarta, Indonesia. (Photos: Xinhua)

Photo taken on Aug. 10, 2021 shows volcanic materials from Mount Merapi covering some flowers after eruption at Mbabadan, Magelang, Central Java, Indonesia.

Photo taken on Aug. 10, 2021 shows Mount Merapi spewing volcanic materials as seen at Cangkringan in Sleman district, Yogyakarta, Indonesia.

Photo taken on Aug. 10, 2021 shows Mount Merapi spewing volcanic materials as seen at Cangkringan in Sleman district, Yogyakarta, Indonesia.