This picture shows the eruption column of the main crater in the background. In the foreground, the eruption of a newly opened fissure is visible (it is just several days old). Interesting features are the two different colours of cloud that originate just a few metres apart: The heavy, ash laden cloud rising like a nuclear mushroom in the sky after an explosion, and the white volatile steam cloud which is continuously rising (like out of a cooling tower).
If wind conditions change and a close observer gets caught in such a cloud then breathing turns difficult and a hailstorm of ash and lapilli particles of all sizes starts.