Daily Review #6 How are earthquakes created? How are P, S and surface waves similar? Different? What...
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Transcript of Daily Review #6 How are earthquakes created? How are P, S and surface waves similar? Different? What...
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Daily Review #6How are earthquakes created?How are P, S and surface waves
similar? Different?What is a tsunami and how is it
made?
![Page 2: Daily Review #6 How are earthquakes created? How are P, S and surface waves similar? Different? What is a tsunami and how is it made?](https://reader035.fdocuments.in/reader035/viewer/2022062423/56649e9d5503460f94b9de15/html5/thumbnails/2.jpg)
Volcanic Eruptions
10,000 times stronger than atomic bomb
Volcanoes – what are they?
DestructiveCreative
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What’s Inside?
Magma vs. lava
Magma chamber
Vents
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Convergent Boundaries
Subduction◦Oceanic
subducted
◦Produces magma
Magma rises to form volcano
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Explosive Eruptions
RareDestructiveProduce clouds of
◦Debris◦Ash◦Gas
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Pyroclastic Flows
Produced in small amounts of time, large amounts of material
LaharFaster than a
hurricaneTemperatures
greater than 700 deg. Celsius
Deadly
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Divergent Boundaries
Rift zone◦Filled by
magmaMid-ocean
ridges◦Most volcanic
activity◦Iceland, island
of Surtsey
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Nonexplosive Eruptions
Most commonProduce
◦Calm lava flows◦Huge amounts of
lavaShape our world
◦Islands in the Pacific
◦Sea floor◦NW U.S.
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Hot Spots
ExamplesVolcanically
activeFar from plate
boundaryTheories
◦Mantle plumes◦Cracks in crust
Move over time