Krakatoa

By Rebecca KaneKrakatau

Its located near the Indonesian island of Rakata in southwestern Indonesia.Near the straight of Java and Sumatra.

IndonesiaMade up of multiple islands

The climate is mostly tropicalDateKrakatau erupted on Aug. 27, 1883

1886 Time PeriodThe time period consisted of American Civil War, Assassination of President Lincoln, and the California Gold Rush

What Happened BeforeIn May the Volcano started to have explosions

The activity started to die down around June

Ash shot 6km (20,000ft) into the sky

Explosions could be heard 99mi away

What Happened DuringIt was rumbling for months until it finally erupted on Aug. 27, 1886

The island was 450km above sea level, but the eruption left it 250 below

Final explosion heard over 4500km away

Half of the volcano slide into the ocean

What Happened AfterMagma flowed 40km and consumed ships in fire and ash

Eruptions created tsunamis 40m high

Debreu shot into the sky leaving a ring around the equatorAlso creating hazes that bent the incoming lightFinal death was 36,417 people

Science behind volcanoes Why: Plate Techtonics

The pates that are crashing into each other are creating higher temps

The heat gets so high it starts the melt the plates

Certain vents on the ocean floor allow the magma to rise and start a volcano

What:Silica levels determine the vicious it will be and it controls the viscosity

Temperature will also determine how vicious it will be (Hotter the less)Viscosity is important because it will tell the type of eruption it will have and the type of volcano

Higher viscosities tend to make higher/steeper volcanoesWhere:forms in belts or chains

location of volcanoes splits in 3 groups

1.) Rift Volcanoes- forms when the plates are moving away from each other

2.) Subduction Volcanoes- when plates collide and slide over each other

3.) Hot Spot Volcanoes- form along where plates meet.