Krakatoa

A volcano in Indonesia, Earth, which underwent a spectacular eruption on August 27, 1883. Sometime prior to his third incarnation, the Doctor witnessed the eruption of Krakatoa; during this event, he also hears Primords for the first time ("Inferno"). That same day, a sketch of the Ninth Doctor washes up on a beach on Sumatra - implying, perhaps, that the Ninth Doctor also witnessed the eruption. It eventually finds its way into Clive's collection of artifacts related to the Doctor ("Rose").