[crz]

This one is a lava volcano. Gasses, Lava, etc.

But, that said. Laki was about a vei 4, went on for months and killed most likely MORE than the Tambora event.

That whole island is one huge volcanic field.

Of course it helps when two plates split the island.

[amorphous]

I wonder if this entire area was originally an impact crater which created Iceland, over time, due to outpouring of lava over the ages?