Good morning, If you are referring to the plume seen throughout the day on CETU 04-07-2022, we were aware of it and it was noted in our remote sensing logs. It was noted in the daily activity log as well, "The steam plume extended up to 70 km (~43 miles) southwest of the active vent overnight. Small eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds usually under 10,000 ft (3 km) above sea level have characterized the recent activity. Small explosions and associated ash emissions may continue..." Semisopochnoi's eruptions have been characterized by this type of plume for several months, and Semi remains at ORANGE/WATCH. -AVO Quite a visible eruption on Semi-Cetu video, but I don't see any mention of it on the AVO website...