“The eruption of Tambora was about ten times as powerful as the more famous eruption of Krakatoa.”
That is my feeling too but at least one author who appeared on the Dennis Prager show did not think so as he was promoting his book.
It was an incredible event and shows despite what nature does, many times more than man can do, the earth is resilient and always returns to livability. This attempt at controlling CO2 in the name of “saving the planet” is pure unadulterated rubbish, meant for nothing more than control and revenue.
On this table, the 2010 volcano in Iceland rates only a 4. Vesuvius and Mt. St. Helens were both 5's. There are 4 6's including Krakatoa in 1883 and Pinatubo in 1991. The only 7 on the list is Mt. Tambora in 1815. (The only one before 1600 on the list is Vesuvius so it may be incomplete for the period before 1600.)
Since they are just giving whole numbers, each one ten times that of one number lower, perhaps Tambora was not exactly 10 times greater, but just in that range.