It was a quiet seeming Day — Volcano

It was a quiet seeming Day-1
There was no harm in earth or sky-
Till with the closing sun
There strayed an accidental Red
A Strolling Hue, one would have said
To westward of the Town-

But when the Earth began to jar 7
And Houses vanished with a roar
And Human Nature hid
We comprehended by the Awe
As those that Dissolution saw
The Poppy in the Cloud
(F.1442/J.1419)
[4] an accidental Red:: minor activity of a volcano.
[5] A strolling Hue:: a hint on the strolling lava.
[7, 8] Earth, jar, Houses vanished:: the eruption of a volcano.
[11] those, Dissolution:: people died, dissolved in the lava.
[12] Poppy in the Cloud:: the bright scarlet color in the sky caused by the eruption.