A volcanic ash plume up to estimated 19000 ft (5800 m) altitude (flight level 190) and moving at 20 kts in SE direction was reported by Volcanic Ash Advisory Center Tokyo (VAAC). The full report is as follows: FVFE01 at 00:00 UTC, 31/12/18 from RJTD VA ADVISORY DTG: 20181231/0000Z VAAC: TOKYO VOLCANO: SHEVELUCH 300270 PSN: N5639 E16122 AREA: RUSSIA SUMMIT ELEV: 3283M ADVISORY NR: 2018/90 INFO…