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turbinetree

(24,632 posts)
Sun Dec 30, 2018, 12:57 AM Dec 2018

Volcano three-quarters blown away by Indonesia tsunami eruption

Peak of Anak Krakatau was brought down by more than 200 metres in explosion that triggered waves killing more than 420 people

Scientists say Indonesia’s Anak Krakatau volcano island, which erupted and collapsed a week ago triggering a deadly tsunami, is now only about a quarter of its pre-eruption size.

Anak Krakatau now has a volume of 40-70m cubic meters having lost up to 180m cubic meters since the 22 December disaster, according to Indonesia’s volcanology agency. The crater peak was brought down from 338 metres to 110 metres.

The explosion caused a tsunami that hit Sumatra and Java where more than 420 people died and 40,000 were displaced.

Experts have largely relied on satellite radar images to work out what happened to the volcano because cloud cover, continuing eruptions and high seas have hampered inspections. The centre said it would get more precise results from more visual inspections.

Authorities have warned residents to stay a kilometre away from the coastline of the Sunda Strait, which separates Java and Sumatra, because of the risk of another tsunami.

Experts say any further tsunami triggered by the volcano would be less severe due to its reduced mass. Anak Krakatau, which means Child of Kratakau, is the offspring of the infamous Krakatau volcano whose monumental eruption in 1883 triggered a period of global cooling.

https://www.theguardian.com/world/2018/dec/29/volcano-was-three-quarters-blown-away-in-indonesia-tsunami-eruption

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CatWoman

(79,283 posts)
2. that is one powerful volcano
Sun Dec 30, 2018, 01:02 AM
Dec 2018

i read about the mother volcano's eruption in the 1800's.

This one sounds just as potent.

applegrove

(118,025 posts)
3. Wow. Vibes again to the souls who lost their lives or were hurt. That
Sun Dec 30, 2018, 01:02 AM
Dec 2018

is huge. I would worry the rest of it would be unstable.

LeftInTX

(24,560 posts)
5. This is the second time it has happened since 1883
Sun Dec 30, 2018, 01:29 AM
Dec 2018

It disappeared completely in 1883, then re-emerged in 1927.

My hunch is 1883 wasn't the first time it collapsed.

roamer65

(36,739 posts)
4. Mount Tambora in 1815 remains the largest in recorded history.
Sun Dec 30, 2018, 01:07 AM
Dec 2018
https://en.m.wikipedia.org/wiki/Mount_Tambora

It took nearly 5,000 ft off the top of the mountain. 1816 was known as the “year without a summer”. Widespread crop failures nearly brought Europe to its knees.
 

elmac

(4,642 posts)
6. That was the year Mary Shelley wrote Frankenstein while staying in Switzerland I believe
Sun Dec 30, 2018, 02:47 AM
Dec 2018

The summer was cold and rainy, one of the worst on record, From her notes" it proved a wet, ungenial summer, and incessant rain often confined us for days to the house.' During these long spells of enforced confinement, the party entertained themselves with conversations, poetry reading and ghost stories."

tclambert

(11,080 posts)
8. They estimate the 1815 Tambora eruption made an explosion equivalent to about 800 megatons of TNT.
Sun Dec 30, 2018, 03:47 AM
Dec 2018

The Tsar Bomba, the largest nuclear device ever set off, had a yield of about 50 megatons. Tambora would have been about 52,000 times the yield of the Hiroshima bomb.

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