Ibu (Halmahera, Indonesia): (20 Jun) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 6000 ft (1800 m) altitude or flight level 060 . The full report is as follows: VA OBS TO FL060 MOV W OBS VA DTG:20/0000Z to 6000 ft (1800 m) Semeru (East Java, Indonesia): (20 Jun) Volcanic Ash Advisory Center Darwin (VAAC)…
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