Near the end of The Clockwork Cat (my steampunk WIP) Our Fearless Heroine, her aunt, the clockwork cat, and (of course) the butler take an airship (captained by a possibly smitten Luddite) to an island to rescue our Fearless Heroine's father.
The only problem is that the island is named (de de de) Mount Tambora!
Yeah, just doesn't have the same kick as Krakatoa, does it. The problem is that Krakatoa didn't have its huge eruption until 1883, while Mount Tambora erupted in 1815. 1815 fits better for my timeline, plus Mount Tambora was a bigger eruption than Krakatoa. (Thus lots of potential for some volcano vs airship action.)
When my readers see the name Krakatoa, they know a volcanic eruption is coming. I don't want it to be a surprise, I want to use that foreknowledge to build tension for the reader. So, shift my book timeline to 1883 and use Krakatoa, or keep it in 1815 and use Mount Tambora, and find some other way to alert the reader without being too ham handed.