Krakatau volcano


Volcanic History

history krakatau volcanoThe three outer island of the present Krakatau group (RakataSeretung and panjang) are thought to be the remnants of one previous, huge volcanic island. Called “Ancient Krakatau“, it was some 11 km in diameter and 2 km high according to records in the Javanese “Book of kings” it exploded and collapsed, perhaps in prehistoric times but possibly as recently as 416 AD. Three island remained on the rim of its submerged, 7 km diameter, central caldera (Collapsed crater). The south easternmost of these, Rakata, grew by volcanic activity until it was about 830 m high and 5 km in diameter. Two smaller volcanic island, Danna (450m) and Perbuatan (120 m), then developed in line and to its north, within the ancient Caldera the three island later joined up into one, Krakatau volcano Indonesia. This was about 9 km long and 5 km wide (dashed line in fig.3). There are records of seven eruptions of Krakatau between the 9th and the 16th centuries. By the nineteenth century it was regard ed as Dormant.
Krakatoa (Indonesian: Krakatau), is a volcanic island made of a’a lava in the Sunda Strait between the islands of Java and Sumatra in Indonesia. The name is used for the island group, the main island (also called Rakata), and the volcano as a whole. The island exploded in 1883, killing approximately 40,000 people, although some estimates put the death toll much higher. The explosion is still considered to be the loudest sound ever heard in modern history, with reports of it being heard nearly 3,000 miles (4,828 km) from its point of origin. The shock wave from the explosion was recorded on barographs around the globe.

The best known eruption of Krakatoa culminated in a series of massive explosions on August 26–27, 1883, which was among the most violent volcanic events in modern and recorded history.

With a Volcanic Explosivity Index (VEI) of 6,[3] the eruption was equivalent to 200 megatons of TNT (840 PJ) – about 13,000 times the nuclear yield of the Little Boy bomb (13 to 16 kt) that devastated Hiroshima, Japan, during World War II and four times the yield of the Tsar Bomba (50 Mt), the largest nuclear device ever detonated.

The 1883 eruption ejected approximately 21 km3 (5.0 cu mi) of rock, ash, and pumice. The cataclysmic explosion was distinctly heard as far away as Perth in Western Australia, about 1,930 miles (3,110 km) away, and the island of Rodrigues near Mauritius, about 3,000 miles (5,000 km) away. Near Krakatoa, according to official records, 165 villages and towns were destroyed and 132 seriously damaged, at least 21,007 (official toll) people died, and many thousands were injured by the eruption, mostly from the tsunamis that followed the explosion. The eruption destroyed two-thirds of the island of Krakatoa.
Eruptions at the volcano since 1927 have built a new island in the same location, named Anak Krakatau (which is Indonesian for “Child of Krakatoa”). This island currently has a radius of roughly 2 kilometres (1.2 mi) and a high point around 300 metres (980 ft) above sea level, growing 5 metres (16 ft) each year.

79 Replies to “Krakatau volcano”

  1. Pingback: 1predatory
  2. Hey Ken, thanks for the tip. The setup isn’t necessarily complete so I may well add a StreamDeck yet, I’ll check it out This story is great. (That’s sarcasm) So I followed the link to the top 10 repairs of 2015. What I didn’t find in the article was the age of the car by repair? Are these 2015 cars being repaired or cars that are10 to 15 years old?That matters. I wonder what the repair problems and costs will be for a 10 to 15 year old Tesla? Furthermore, you’ve neglected the environmental impact of mining all the materials for the batteries and electronics. Most come from China where they don’t care about pollution or war torn African countries where children are paid next to nothing to work in extremely hazardous conditions.Save the Polars bears. They’re cuter than dead fish in a river in the other side of the planet.

  3. I agree with your point of view, your article has given me a lot of help and benefited me a lot. Thanks. Hope you continue to write such excellent articles.

  4. Kadikoy Su tesisatcisi olarak su tesisati, tikaniklik acma, kacak su tespiti ile ilgili her turlu konuda sizlere hizmet sunuyoruz. istanbul Kadikoy de en iyi su tamircileri ve sihhi doseme ustalari firmamiz ile calismaktadir. Tesisat yenileme, tesisat doseme, komple bina ve daire tesisat, batarya tamiri, banyo, mutfak, tuvalet tesisat yenileme isleri, musluk tamiri, dusa kabin ve kuvet onarim, bakim ve onarimi gibi hizmetler vermekteyiz.

  5. Very nice post. I just stumbled upon your blog and wanted to say that I’ve really enjoyed browsing your blog posts. In any case I’ll be subscribing to your feed and I hope you write again soon!

  6. Dışarı çekerek, Buca Escort Bayan Özge o gece partiye giydiği oldukça kıyafeti olduğunu fark, aynı kıyafeti o olmasaydı yatağına kıvrılmış ağlarken bulduğunda giyiyordu.

  7. I have read your article carefully and I agree with you very much. This has provided a great help for my thesis writing, and I will seriously improve it. However, I don’t know much about a certain place. Can you help me?

  8. Thank you for your sharing. I am worried that I lack creative ideas. It is your article that makes me full of hope. Thank you. But, I have a question, can you help me?

  9. I am an investor of gate io, I have consulted a lot of information, I hope to upgrade my investment strategy with a new model. Your article creation ideas have given me a lot of inspiration, but I still have some doubts. I wonder if you can help me? Thanks.

  10. Your article made me suddenly realize that I am writing a thesis on After reading your article, I have a different way of thinking, thank you. However, I still have some doubts, can you help me? Thanks.

  11. After reading your article, I have some doubts about I don’t know if you’re free? I would like to consult with you. thank you.

  12. Thank you very much for sharing. Your article was very helpful for me to build a paper on After reading your article, I think the idea is very good and the creative techniques are also very innovative. However, I have some different opinions, and I will continue to follow your reply.

  13. I may need your help. I’ve been doing research on gate io recently, and I’ve tried a lot of different things. Later, I read your article, and I think your way of writing has given me some innovative ideas, thank you very much.

  14. Reading your article helped me a lot and I agree with you. But I still have some doubts, can you clarify for me? I’ll keep an eye out for your answers.

  15. Ümraniye elektrikçi Akıllı Ev Sistemleri Elektrik konusunda uzman olan ekibimiz, akıllı ev sistemleri konusunda da bilgi sahibidir. Bu sistemleri kullanarak enerji verimliliğinizi artırabilir

Leave a Reply

Your email address will not be published. Required fields are marked *