416 Eruption of Krakatau

Reference #414:

The Javanese "Book of kings" ("Rustaka radja" ) , which is a chronicle of the island , contains the following account of the eruption of Mount Kapi. In 338 Saka (that is, 416), a thunderous roar was heard from the bowels of Mount Ratuwara (also called Pulosari, an extinct volcano in the Banten region, the closest to the Sunda strait). This roar was answered by an identical roar from the bowels of Mount Kapi, which is situated west of the modern [region?] of Eanten. An enormous blinding flame, which reached the heavens, exploded from Kapi* Mountain. The whole world shook, Thunder pealed out, a storm burst, and it began to rain. However, the eruption of flame from Mount Kapi not only did not diminish with the rain , but even increased, The roar was terrifying. In the end, Mount Kapi exploded into pieces with a terrific noise and descended into the depths of the earth. A sea wave arose and inundated the land... After the water receded, Mount Kapi and its locality were left on the sea bottom, while Java Island split into two parts. Thus the islands of Sumatra and Java were separated. [The events are very similar to the famous eruption of Krakatau in 1883. It is possible that Mount Kapi is in fact the Krakatau Volcano.]

Reference #2771:

According to ancient Japanese scriptures, the first known supercolossal eruption of Krakatau occurred in the year 416 A. D. - Some have reported it to occur in 535 A.D. The energy of this eruption is estimated to have been about 400 megatons of TNT, or the equivalent of 20,000 Hiroshima bombs. This violent early eruption destroyed the volcano, which collapsed and created a 7 km wide submarine caldera. The remnants of this earlier violent volcanic explosion were the three islands of Krakatau, Verlaten and Lang (Rakata, Panjang, and Sertung). Undoubtedly the 416 A.D. eruption/explosion/collapse generated a series of catastrophic tsunamis, which must have been much greater than those generated in 1883. The time of tsunami with wave height of several meters that affected Tamilnadu in India matches with this early Krakatau eruption. However, there are no other records to document the size of these early tsunamis or the destruction they caused. Subsequent to the 416 A.D. eruption and prior to 1883, three volcanic cones of Krakatau and at least one older caldera had combined again to form the island of Rakata.

Reference #2432:

The renowned volcano Krakatau (frequently misstated as Krakatoa) lies in the Sunda Strait between Java and Sumatra. Collapse of the ancestral Krakatau edifice, perhaps in 416 AD, formed a 7-km-wide caldera. Remnants of this ancestral volcano are preserved in Verlaten and Lang Islands; subsequently Rakata, Danan and Perbuwatan volcanoes were formed, coalescing to create the pre-1883 Krakatau Island.