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Was Krakatoa a phreatic eruption?
Examples of phreatic eruptions Krakatoa – Indonesia, 1883 (see 1883 eruption of Krakatoa) – it is believed that the eruption, which obliterated most of the volcanic island and created the loudest sound in recorded history, was a phreatomagmatic event.
What did the Krakatoa eruption do?
Heard 3,000 miles away, the explosions threw five cubic miles of earth 50 miles into the air, created 120-foot tsunamis and killed 36,000 people. Krakatoa exhibited its first stirrings in more than 200 years on May 20, 1883. A German warship passing by reported a seven-mile high cloud of ash and dust over Krakatoa.
What kind of volcano is Anak Krakatau?
stratovolcano
Anak Krakatau is classified as a “stratovolcano.” This type of volcano (also known as a “composite volcano”) is formed through the…
When did Krakatoa explode?
2020
Krakatoa/Last eruption
Why was Krakatoa so violent?
Originally Verbeek thought that Krakatoa was so fierce because sea water flooded into the volcano, reacting with molten lava; the build-up of pressure from the resulting steam would have led to an enormous blast. Small earthquakes indicate that the volcano is becoming unstable.
What type of lava does Krakatoa have?
rhyolite
Mount Krakatoa’s lava was known to be made of dacite or rhyolite. This explains the magnitude of its eruption. Generally speaking, volcanic eruptions are more explosive if their lava is composed of dacite or rhyolite. They are cooler and stickier than basalt, allowing them to accumulate pressure before being set free.
What caused Krakatoa to erupt?
The Krakatoa eruptions were caused by the subduction of the Indo-Australian tectonic plate as it moved northward towards mainland Asia. Subduction is a geological process by which one edge of a crustal plate is forced sideways and downward into the mantle below another plate.
Was Krakatoa a super volcano?
Krakatoa was a super-caldera volcano (meaning it has super eruptions) located in Indonesia and erupted in 1883.
How often does Krakatoa erupt?
The island is called Anak Krakatau, which means child-of-Krakatau. It is pretty much erupting all the time at a low level, but once or twice a year it has slightly larger eruptions that people notice and sometimes report in the news.
What impact did Krakatoa have on the world?
Krakatoa eruption cooled the world. WHEN the Indonesian volcano Krakatoa erupted in 1883, sending 25 cubic kilometres of rock and ash into the air, it did more than generate the loudest sound ever recorded. It also cooled the world’s oceans and suppressed rises in sea level for decades afterwards.