There was a movie or book about that explosion: “Krakatoa: East of Java” was the name, the only problem was that Krakatoa is west of Java.
http://www.imdb.com/title/tt0064555/
PLOT: “The Dutch East Indies, in the late 19th century. Capt. Hanson of the “Batavia Queen” is preparing to embark on a salvage expedition. His mistress, Laura, knows the location of a ship belonging to her late husband, a shipwreck concealing a cargo of rare pearls. A diver and a diving bell are aboard ship. But a government agent coerces Hanson into accepting a shipment of convicts for the ship’s hold. The wreck lies dangerously close to the erupting volcano on the island of Krakatoa, where Laura’s young son attends the convent school...”
WHOOPS — Krakatoa wasn’t until 1883, 68 years after Tambora erupted https://en.wikipedia.org/wiki/1815_eruption_of_Mount_Tambora
I saw it. it wasn’t that great. I like A FAIR WIND TO JAVA.
https://en.wikipedia.org/wiki/Fair_Wind_to_Java
Well, it sounded good . . .
I read the book a couple of months ago. Very well done, I heard about it here at FR.