Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 20000 ft (6100 m) altitude or flight level 200 and is moving at 15 kts in E direction. The full report is as follows: FVFE01 at 23:35 UTC, 21/04/19 from RJTD VA ADVISORY DTG: 20190421/2335Z VAAC: TOKYO VOLCANO: KLYUCHEVSKOY 300260 PSN: N5603 E16039 AREA: RUSSIA…