Where is krakatoa
This is
modern
day
krakatoa
• Unlike what the film
says krakatoa is
actually to the west of
Java and southwest of
Sumatra. It is part of
Indonesia
When did it erupt
• Krakatoa erupted in 1883 4 times in two
days ,once on the 26th of October at
17:07,and three times on the 27th at 05:30,
06:44 and 10:02.
What damage did it do
Anak krakatoa was created by
the explosions. It is in the
middle of the island which was
partly destroyed
The fourth explosion
caused a giant tsunami
(bigger than those created
by the other three) which
destroyed many coastal
towns in the Saundra strait
. The Tsunami managed to
cause small sea level
oscillations as far as the
English channel
•
•
•
•
•
1. The explosions were heard on Rodriguez Island,
4653 km distant across the Indian Ocean, and over
1/13th of the earth's surface.
2. Ash fell on Singapore 840 km to the N, Cocos
(Keeling) Island 1155 km to the SW, and ships as far as
6076 km WNW. Darkness covered the Sundra Straits
from 11 a.m. on the 27th until dawn the next day.
3. Giant waves reached heights of 40 m above sea
level, devastating everything in their path and hurling
ashore coral blocks weighing as much as 600 tons.
4. At least 36,417 people were killed, most by the giant
sea waves, and 165 coastal villages were destroyed.
5. When the eruption ended only 1/3 of Krakatau,
formerly 5x9 km, remained above sea level, and new
islands of steaming pumice and ash lay to the north
where the sea had been 36 m deep.
• 6. Every recording barograph in the world documented
the passage of the airwave, some as many as 7 times as
the wave bounced back and forth between the eruption
site and its antipodes for 5 days after the explosion.
• 7. Tide gauges also recorded the sea wave's passage
far from Krakatau. The wave "reached Aden in 12 hours,
a distance of 3800 nautical miles, usually traversed by a
good steamer in 12 days".
• 8. Blue and green suns were observed as fine ash and
aerosol, erupted perhaps 50 km into the stratosphere,
circled the equator in 13 days.
• 9. Three months after the eruption these products
had spread to higher latitudes causing such vivid
red sunset afterglows that fire engines were called
out in New York, Poughkeepsie, and New Haven to
quench the apparent conflagration. Unusual sunsets
continued for 3 years.
• 10. Rafts of floating pumice-locally thick enough to
support men, trees, and no doubt other biological
passengers-crossed the Indian Ocean in 10 months.
Others reached Melanesia, and were still afloat two
years after the eruption.
• 11. The volcanic dust veil that created such
spectacular atmospheric effects also acted as a
solar radiation filter, lowering global temperatures as
much as 1.2 degree C in the year after the eruption.
Temperatures did not return to normal until 1888.