Quelle est l'éruption volcanique la plus meurtrière ?
Quelle est l'éruption volcanique la plus meurtrière ?
Éruptions les plus meurtrières
| Éruption | Volcan | Nombre de morts |
|---|---|---|
| Éruption du Tambora en 1815 | Tambora | 92 000 |
| Éruption du Krakatoa en 1883 | Krakatoa | 36 417 |
| Éruption du Vésuve en 79 | Vésuve | > 1 500 corps retrouvés, < 33 000 habitants probables de la région |
| Éruption de la montagne Pelée en 1902 | Montagne Pelée | 29 000 |
How was Anak Krakatoa formed?
- A composite volcano, such as Krakatoa, is formed when runny lava escapes through a fissure in the earths crust and spreads out . This occurence happens everytime the volcano erupts creating layers of cooled lava and ash. These types of volcanos are typicaly tall and have steep sides.
What type of a volcano is Anak Krakatau?
- The name "Anak Krakatau" means "Child of Krakatau," so this look at the modern volcano's predecessor provides perspective for scientists. Krakatau was a classic cone-shaped stratovolcano (meaning it was made of layers and layers of erupted material) that appeared to be intact and large.
What is Krakatoa made of?
- Krakatoa lies along the convergence of the Indian-Australian and Eurasian tectonic plates, a zone of high volcanic and seismic activity. Sometime within the past million years, the volcano built a cone-shaped mountain composed of flows of volcanic rock alternating with layers of cinder and ash.
What are the dimensions of Anak Krakatoa?
- The crater rim of Anak Krakatau first emerged on 28.01.1928, only to be washed away and rebuilt before eventually establishing itself as a sickle-shaped island with a height of 38m and a length of 275m by 1929 (Stehn 1929. Proc. 4th Pacific Sci. Congress, p.1-55).
