Knocks my entry into a cocked hat ... amazing image and would probably get a
place even with no further changes.

Some constructive criticism...

The smoke towards the edges of the image is too blurred.  In all photos I've
seen of a real-life eruption, the edges of the smoke plume are very
well-defined due to the sheer scale of it all and the fact that it won't be
moving upwards quickly enough to create any kind of motion blur).

The top-most edge of the crater is very sharply-defined and stands out a
little too much ... maybe place some smoke media in front of the edge to
blur it out a little?

Ian.

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