Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Tokyo warned of a volcanic ash plume rising to an estimated 18000 ft (5500 m), or flight level 180, and moving at 20 kts in NE direction.Original VAAC bulletin:FVFE01 at 20:20 UTC, 21/08/26 from RJTDVA ADVISORYDTG: 20260821/2020ZVAAC: TOKYOVOLCANO: KLYUCHEVSKOY 300260PSN: N5603 E16039AREA: RUSSIASOURCE ELEV: 4754M AMSLADVISORY NR: 2026/27INFO SOURCE: HIMAWARI-9ERUPTION DETAILS: VA AT 20260821/2000Z FL180 EXTD NEOBS VA DTG: 21/2000ZOBS VA CLD: SFC/FL180 N5607 E16037 - N5631 E16120 - N5618 E16129 - N5601 E16039 MOV NE 20KTFCST VA CLD +6 HR: 22/0200Z SFC/FL190 N5734 E16602 - N5715 E16551 - N5603 E16038 - N5716 E16133 - N5754 E16321FCST VA CLD +12 HR: 22/0800Z SFC/FL220 N5849 E17225 - N5812 E17136 - N5846 E16753 - N5603 E16038 - N5832 E16224 - N6000 E16758FCST VA CLD +18 HR: NO VA EXPRMK: NILNXT ADVISORY: 20260822/0000Z=