Thanks for that info.
Semeru Volcano Volcanic Ash Advisory: HIGH-IMPACT ERUPTION TO FL460 MOV E OBS VA DTG: 16/1245Z to 46000 ft (14000 m)
https://www.volcanodiscovery.com/semeru/news/103739/Semeru-Volcano-Volcanic-Ash-Advisory-HIGH-IMPACT-ERUPTION-TO-FL460-MOV-E-OBS-VA-DTG-161245Z-to-46000.html