Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 17000 ft (5200 m) altitude or flight level 170 and is moving at 20 kts in E direction. The full report is as follows: FVFE01 at 10:16 UTC, 15/04/19 from RJTD VA ADVISORY DTG: 20190415/1016Z VAAC: TOKYO VOLCANO: KLYUCHEVSKOY 300260 PSN: N5603 E16039 AREA: RUSSIA…