Acutalités volcaniques sur le Krakatau:

Krakatau (Anak Krakatau) volcan

Krakatau, un groupe de petites îles dans le détroit de la Sonde, entre les îles de Sumatra et de Java est l'un des volcans les plus célèbres du monde. Il s'agit d'une caldeira souvent submergé par trois îles appartenant à la jante et d'un nouveau cône, Anak Krakatau, ce qui a été former une nouvelle île depuis 1927 et reste très actif.
Krakatau a explosé de façon spectaculaire dans une éruption dévastatrice plinienne 1883 qui a tué plus de 30.000 personnes (principalement par les tsunamis énormes déclenché par l'éruption). L'éruption a été l'un des premiers événements de nouvelles mondiales, après les lignes télégraphiques ont relié les différents continents.

Introduction:

The renowned volcano Krakatau (or Krakatoa) lies in the Sunda Strait between Java and Sumatra. Collapse of the ancestral Krakatau edifice, perhaps in 416 AD, formed a 7-km-wide caldera. Remnants of this ancestral volcano are preserved in Verlaten and Lang Islands; subsequently Rakata, Danan and Perbuwatan volcanoes were formed, coalescing to create the pre-1883 Krakatau Island. Caldera collapse during the catastrophic 1883 eruption destroyed Danan and Perbuwatan volcanoes, and left only a remnant of Rakata volcano. This eruption, the 2nd largest in Indonesia during historical time, caused more than 36,000 fatalities, most as a result of devastating tsunamis that swept the adjacent coastlines of Sumatra and Java. Pyroclastic surges traveled 40 km across the Sunda Strait and reached the Sumatra coast. After a quiescence of less than a half century, the post-collapse cone of Anak Krakatau (Child of Krakatau) was constructed within the 1883 caldera at a point between the former cones of Danan and Perbuwatan. Anak Krakatau has been the site of frequent eruptions since 1927.
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Source: GVP, Smithsonian Institution

Krakatau (Anak Krakatau) Photos:

La foudre dans la colonne de cendre éruptive d'une explosion de l'Anak Krakatau (novembre 2010) (Photo: Tom Pfeiffer)	Une des rares explosions vulcaniennes avec un gros éclair dans la colonne éruptive. (1er sept 09) (Photo: Tom Pfeiffer)	De temps en temps, des explosions très fortes jettent des bombes sur tout le cone et ailleurs, dangereusement proche à la place de l'observateur... (Photo: Tom Pfeiffer)...
A powerful vulcanian eruption from Anak Krakatau in the evening (ca. 19h00 local time) of the 2nd July throws blocks all over the cone and the old crater rim; many blocks...	After about 10 seconds, the first blocks impact on the water, while the ash could and the small pyroclastic flows on the flank of the cone expand and develop further. (Ph...	A fraction of a second later, the largest blocks are falling onto the slope of the cone, leaving dense trails of ash behind in the air, while the ash cloud expands, parts...

Krakatoa - the world's most infamous volcano

The island group of Krakatoa (or Krakatau) lies in the Sunda Strait between Java and Sumatra.  Krakatoa is infamous for its violent Plinian eruption in 1883, that destroyed the previous volcanic edifice and enlarged its caldera.
Collapse of the former volcanic edifice, perhaps in 416 AD, had formed a 7-km-wide caldera.  Remnants of this ancestral volcano are preserved in Verlaten and Lang Islands; subsequently Rakata, Danan and Perbuwatan volcanoes were formed, coalescing to create the pre-1883 Krakatoa island.  Caldera collapse during the catastrophic 1883 eruption destroyed Danan and Perbuwatan volcanoes, and left only a remnant of Rakata volcano. 
This eruption, the 2nd largest in Indonesia during historical time (the most violent being the eruption of Tambora in 1815), caused more than 36,000 fatalities, most as a result of devastating tsunamis that swept the adjacent coastlines of Sumatra and Java.  Pyroclastic surges traveled 40 km across the Sunda Strait and reached the Sumatra coast.  After a quiescence of less than a half century, the post-collapse cone of Anak Krakatoa ("Child of Krakatoa") was constructed within the 1883 caldera at a point between the former cones of Danan and Perbuwatan.  Anak Krakatau has been the site of frequent eruptions since 1927.

(adapted from GVP)