§4.3 Mount Aso volcano part 1

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§4.3 Mount Aso volcano part 1

Program

• Throwback §4.2
  
• New information
  
• Let's get to work
  
• The end
  

1

2

3

4

5

The quake caused a wave

In shallow water, the waves are slowed down, they become higher

Undersea earthquake

The water arrives at the beach with high force

In deep water, waves can go 800km/hour

What does the red dot indicate

1. Epicentrum
2. Hypocentrum

What kind of earthquake has been here?

1. 3-4
2. 4-5
3. 5-6
4. 6-7

The opening photo

Beschrijving van de openingsfoto

Het ingerichte landschap in de caldeira van de vulkaan de Aso.

Where is the volcano?

You will learn:

• how the Aso volcano was formed
• what the landscape of the caldeira of the Aso volcano looks like
• what the benefits of volcanism are

The volcanoes of Japan

Diving away plates

Note:

• Plate movements cause not only earthquakes but also volcanoes
• Rule: the deeper you go into the earth, the higher the temperature becomes. A submerged plate partially melts. It creates magma that rises and causes volcanic eruptions.
• Near Japan, the two oceanic plates dip below the Eurasian continental plate.

Most famous type of volcano

1. Magmachamber
   
2. Kraterpijp
3. Krater
   
4. Eventuele zijspleten
   Na een uitbarsting:
5. Als het kraterdak instort, ontstaat een caldeira

Aso volcano is an ancient volcano with kilometers wide hangover, the caldeira.
    This caldeira can be created by a powerful volcanic eruption.

Types of volcanoes

Before a caldeira forms, it is a volcano of the type:

1. Shield vocano
2. Crevice volcano
3. Stratovolcano
4. Track volcano

Three types of volcanoes

Shield volcano

• Plate movement: divergence
• Non-explosive
• magma is thin and fluid

    gentle slope

Strato volcano

• plate movement: subduction
• explosive (eruption)
• magma thick and viscous
• steep slope
• volcanic bombs
• pyroclastic flow (glow cloud)

Caldera volcano

• formed from stratovolcanoes with large magma chamber
• After eruption, the roof of the deflated magma chamber collapses
• A crater lake and (1 or more ) new crater(s) form in the old crater

Emergence of a caldera

Effects of a volcanic eruption

• Lava and ash
• Volcanic bombs
• steam
• Toxic gas clouds
• Earthquakes 
• Pyroclastic flows or a lahar

Homework

From §4.3, make assignments 1, 2, 3, 4 and 5

Finished?

Make assignments 6, 7 and 8