On Thursday, 16 April 2015 09:57:19 UTC+1, Martin Brown wrote:
On 15/04/2015 19:08, Graham P Davis wrote:

The April issue of Weather has a review of a book about the Tambora
eruption. In the review, it says that the "eruption was bigger by at
least one order of magnitude than any before it." Should he have
added something on the lines of "except for the mystery eruption that
occurred only seven years earlier which may have been as big and had a
greater effect on the climate"?

Where is the evidence for this earlier volcanic action? It should have
left a sizeable hole somewhere or a bunch of fresh lava and ash fields.
A caldera forming volcanic explosion is difficult to hide!

I remain puzzled why Tambora did not precipitate a display of winter
nacreous clouds at temperate latitudes in the same way that Krakatoa did
for a couple years following its less significant eruption.

--
Regards,
Martin Brown

Martin,

Laki, if that was the one that Graham is thinking about, was not a volcanic eruption producing a caldera. It was an eruption like that just posted by Asha which creates a line of fire fountains. It can be seen here http://www..bbc.co.uk/news/science-environment-32321005

That BBC report also mentions Laki.