Wie explodiert ein Schichtvulkan?
Der hohe Gasanteil bewirkt, dass die Eruptionen explosiv verlaufen und zwar meist im Wechsel zwischen austretendem Lockermaterial, genannt Tephra (Bomben, Lapilli, Aschen), und Lava. Eine solche Abfolge verursacht bei Erkaltung und Ablagerung die charakteristische Schichtung, die namensgebend für diesen Vulkantyp ist.
Warum ist ein Schichtvulkan so gefährlich?
Der Austritt von Gasen, die in der Gesteinsschmelze enthalten sind, erfolgt bei den Schichtvulkanen meistens abrupt. Ursache dafür ist die kieselsäure- und gasreiche Beschaffenheit des Magmas. Lavafetzen werden hochgeschleudert, erstarren und fallen als Bomben, Lapilli und Asche zurück.
In welchem Land befindet sich der Vulkan Krakatau?
Lampung
Krakatau/Provinz
What was the result of the Krakatoa explosion?
The eruptions diminished rapidly after the fourth massive explosion and by the morning of August 28, Krakatoa was silent. But by then two-thirds of the island had been destroyed, vanishing under the waves.
Where was the island of Krakatoa in 1883?
On the morning of Aug. 26, 1883, the residents of the island of Krakatoa in the Sunda Strait of Indonesia, then-Dutch East Indie, arose like it was any other day. They went about their business as smoke trailed from the three volcanic cones that dotted the island.
Who was the British captain at the time of the Krakatoa eruption?
The description given at the San Francisco Hydrographic Office by Captain Watson, of the British ship Charles Bal, who was in the near vicinity at that time, is especially graphic and thrilling.
When was the last eruption of the Krakatoa volcano?
By 1883, Krakatoa was made up of three peaks: Perboewatan, the northernmost and most active; Danan in the middle; and the largest, Rakata, which formed the southern end of the island. Krakatoa was last thought to have erupted some two centuries earlier, in 1680, and most people believed it was extinct.