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Volcanic
activity recommenced in May, 1883 and continued into August, the first
eruptions appearing on the northern, Perbuatan volcano. The number of active
vents increased on both the northern volcanoes. On the 26 th and 27 th August
series of cataclysmic explosions occurred which were heard 3500 miles away as
far away as South Australia and Ceylon, was recorded as of the world's biggest
explosion the force of 100.000 hydrogen bombs, They generated tsunamis (tidal
wave) crashed ashore and devastated hundreds of town and village, reaching
almost 10 miles inland in some places. The resulting killer waves at speed up
to a 350 miles per hour and reached height of 135 feet that were registered
even in the English Channel, 11.000 miles away
and which in the Sunda - strait area were devastating, killing more than 36.000
people. That total volume of material ejected by the eruption is estimated at
some 18 - 21 cubic kilometers, 30 km high into the atmosphere with an ash cloud
circling the earth several times. Causing "blue suns" and "orange moons" Europe and North America. The amount of the
sun's energy reaching the earth was reduced, and in the year or two that
followed, annual average temperatures in the northern hemisphere were than
usual.
In
the aftermath of the explosion only about a third of Krakatauemained. The northern two thirds, including the volcanoes Perbutan and Danan and
the northern half of the Rakata Volcano, were gone. In their place was a
collapsed crater (caldera) 200m beneath the sea, covering an area of about 28
square kilometer. The remaining, southern part of Rakata was left as
approximate half, cone with an almost perpendicular cliff from the summit (813
m) to the sea, providing a natural, geological section through the volcano. The
other two islands, Sertung and Panjang, were enlarged considerably (Sertung
doubled in size) by the glowing ash and pumice which smothered them to a depth
of 30 meters. On Rakata, the south and west coasts were were extended almost a
kilometer-seawards and the ash layer reached a thickness of 60 m in some areas,
although probably much shallower on the steeper slopes. Weeks after the
explosion, rain water turned into steam as it trickled into crevices and a even
month later the surface was too hot for bare feet. It is believed that all
life, plant and animal, was destroyed on the islands. Yet the three islands are
now covered in forest, and over 200 species of higher plants and 36
species of land birds have been found on Rakata in the 1980s.
At
some point in prehistory, an earlier caldera-forming eruption occurred, leaving
as remnants Verlaten, Lang, Poolsche Hoed, and the base of Rakata. Later, at
least two more cones (Perboewatan and Danan) formed and eventually joined with
Rakata, forming the main island of Krakatoa. The dating of
these events is currently unknown; the Sunda Strait was first mentioned by Arab sailors around 1100 AD.
The Javanese
Book of
Kings (Pustaka Raja) records that in the year 338 Saka
(416 AD):
A thundering sound was heard from
the mountain Batuwara [now called Pulosari, an
extinct volcano in Bantam,
the nearest to the Sunda Strait which was
answered by a similar noise from Kapi, lying westward of the modern Bantam
[Bantam is the westernmost province in Java, so this seems to indicate that
Krakatoa is meant]. A great glowing fire, which reached the sky, came out of
the last-named mountain; the whole world was greatly shaken and violent
thundering, accompanied by heavy rain and storms took place, but not only did
not this heavy rain extinguish the eruption of the fire of the mountain Kapi,
but augmented the fire; the noise was fearful, at last the mountain Kapi with a
tremendous roar burst into pieces and sank into the deepest of the earth. The
water of the sea rose and inundated the land, the country to the east of the
mountain Batuwara [now called Mount Gede, a volcano in Western Java], to the mountain Rajabasa [the
most southerly volcano in Sumatra], was inundated by the sea; the inhabitants
of the northern part of the Sunda country to the mountain Rajabasa were drowned
and swept away with all property ... The water subsided but the land on which Kapi stood became sea, and Java
and Sumatra were divided into two parts.
There is no geological evidence
of a Krakatoa eruption of this size around that time; it may describe loss of
land which previously joined Java to Sumatra across what is now the narrow east
end of the Sunda Strait; or it may be a mistaken date, referring
to an eruption
in 535 AD, for which there is some corroborating historical evidence.
535 AD event
David Keys, Ken Wohletz, and others have
postulated that a violent volcanic eruption, possibly of Krakatoa, in 535 may
have been responsible for the global climate changes of 535-536.
Keys explores what he believes to be the radical and far-ranging global effects
of just such a putative 6th-century eruption in his book Catastrophe: An
Investigation into the Origins of the Modern World. Additionally, in recent
times, it has been argued that it was this eruption which created the islands
of Verlaten, Lang, and the beginnings of Rakata—all
indicators of early Krakatoa's caldera's size. However, to date, little, if any, datable
charcoal from that eruption has been found.
Thornton mentions that Krakatoa was
known as "The Fire Mountain" during Java's Cailendra dynasty, with records of
seven eruptive events between the 9th and 16th centuries. These have been
tentatively dated as 850, 950, 1050, 1150, 1320, and 1530 (all AD/CE).
the 19th [of November 1681] we
again lifted anchor and proceeded first to the north of us to the island of
Sleepzie [ Sebesi
], uninhabited, ...[here he tells of a legend about crying ghosts, which
actually were orangutangs ], and then still north of the island of
Cracatou, which erupted about a year ago and also is uninhabited. The rising
smoke column of this island can be seen from miles away; we were with our ship
very close to shore and we could see the trees sticking out high on the
mountain, and which looked completely burned, but we could not see the fire
itself.
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