Starting from 2016 and on a regular basis Ebeko erupts columns of ashes and gas-vapour clouds. On April 6, 2021 another ashfall occurred and reached the altitude of 2km with a plume dispersion of 5 km. The satellite picture shows the plume moving towards the city area.
But the situation has no reason for concern - the maximum AQI defined was 5 out of 10. And CityAir monitors registered some sulphur gases already on the eve on April 3 - you may see that on the diagram.