visible above the cloud deck, rising at times to at least 30,000 feet (9 km). Steady winds from the east-north-east moved the cloud away from the volcano.
The cloud height was variable from 25 to 30,000 feet and its colour varied from dark to
white, depending on how much ash was in the cloud.
Away from the main cloud, the ash cloud narrows into a wedge:
The dark wedge that can be seen
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