Klyuchevskoy (Kamchatka): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 22000 ft (6700 m) altitude or flight level 220 and is moving at 20 kts in E direction. The full report is as follows: VA AT 20200414/1800Z FL220 EXTD E OBS VA DTG:14/1800Z to 22000 ft (6700 m) Aso (central Kyushu, Japan): Volcanic Ash…