Answer: What In The World Happened Here? XCVIII: (98)

This is the way Krakatoa looked after the explosion:

The clue was just Anak Krakatau (Krakatoa's Child), which has changed since:

All in all, an interesting Island/Explosion combination. And it will blow again. They are considering building a bridge across the Sunda Straight, which is less than 30 miles from the growing monster.

Verum audaces non gerunt indusia alba. - Ipsi dixit MCMLXXII