Photo taken on June 21, 2021 shows white smokes spewing from Mount Merapi as seen from Tunggul Arum in Sleman district, Yogyakarta, Indonesia. (Photos: Supriyanto/Xinhua)

Photo taken on June 21, 2021 shows volcanic materials spewing from Mount Merapi as seen from Tunggul Arum in Sleman district, Yogyakarta, Indonesia.

Photo taken on June 21, 2021 shows white smokes spewing from Mount Merapi as seen from Tunggul Arum in Sleman district, Yogyakarta, Indonesia.

Photo taken on June 21, 2021 shows white smokes spewing from Mount Merapi as seen from Tunggul Arum in Sleman district, Yogyakarta, Indonesia.