17 2a earthquakes and volcanoes
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trial and errorTRANSCRIPT
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Earth’s Interior and Plate Tectonics
Earthquakes and
Volcanoes
Earth’s Interior
and Plate Tectonics
Minerals and Rocks
What is Earth’s Interior
like
Evidence for Plate Tectonics
What are Earthqua
Structure and
Origin of Rocks
How old are RocksVolcanoe
s
Weathering and Erosion
Erosion
Chemical Weatherin
g
Physical Weatherin
g
Transform Fault
Boundaries
Convergent Plate
Boundaries
Divergent Plate
Coundaries
Plate Tectonics
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Earthquakes and Volcanoes
Vocabulary• Focus – the area along a fault at which slippage first
occurs, initiating an earthquake.• Epicenter – the point on Earth’s surface directly above
the focus.• P waves – primary waves; the longitudinal waves
generated by an earthquake
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P waves
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P waves
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2011 Japan Earthquake
• http://www.youtube.com/watch?v=iQfdl7y-blE
• http://www.youtube.com/watch?v=zfxlzyOXlic&feature=related
• http://www.youtube.com/watch?v=TRDpTEjumdo&feature=related
• http://www.youtube.com/watch?v=4GFLqsUexZ0
• http://www.youtube.com/watch?v=nLUmQrKOyuk&feature=related
• http://www.youtube.com/watch?v=1ikus_TEaGI&feature=related
• http://www.youtube.com/watch?v=OdhfV-8dbCE&feature=related
• http://www.youtube.com/watch?v=w3AdFjklR50&feature=relmfu
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• How volcanoes are formed http://www.youtube.com/watch?v=ANeH9W-HMPc&feature=related
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A 1976 earthquake near Guatemala City shattered this bridge in Agua Caliente, cutting off the city’s main supply route to the Atlantic. The 7.5-magnitude quake killed more than 23,000 people and left thousands more injured and homeless.
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A crane and several construction vehicles lay toppled on a fractured road in Kobe, Japan, after a 7.2-magnitude temblor shook the quake-prone country. The Great Hanshin Earthquake Disaster of 1995 was one of the worst in Japan’s history, killing 6,433 people and causing more than $100 billion in damages.
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The San Andreas Fault scars Southern California’s Carrizo Plain like a battle wound. The 800-mile (1,300-kilometer) fault runs through western and southern California, dividing the Pacific and North American plates.
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Workers position support beams to steady tilting homes in San Francisco's Marina District after a disastrous earthquake hit the city in 1989. The 7.1-magnitude earthquake buckled highways and bridges, crushed cars, and toppled homes and buildings throughout the city.
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The Izmith, Turkey Temblor
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The Izmith, Turkey Temblor
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The Izmith, Turkey Temblor
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The Izmith, Turkey Temblor
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The Izmith, Turkey Temblor
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Bagiou City, Philippines
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Bagiou City, Philippines
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Bagiou City, Philippines
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Bagiou City, Philippines
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17.2 Earthquakes and Volcanoes
Vocabulary• Focus• Epicenter• P waves• S waves• Surface waves• Seismology• Richter scale• vent
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17.2 Earthquakes and Volcanoes• Read: “Energy from
earthquakes is transferred through Earth by waves” (p568-569)
• Write on your cornell notes information on:– Longitudinal waves– Primary waves– Transverse waves– Secondary Waves
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Mayon Volcano, Philippines
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Mayon Volcano, Philippines
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Mt. Pinatubo, Philippines
Mt. Pinatubo Crater Lake
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Mt. Pinatubo, Philippines
Mt. Pinatubo Crater Lake
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Mt. Pinatubo, Philippines
Mt. Pinatubo Days Before Eruption
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Mt.
Pina
tubo
, Phi
lippi
nes
Mt.
Pina
tubo
: Firs
t Eru
ption
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Mt. Pinatubo, Philippines
3 Minutes after first Eruption
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Mt. Pinatubo, Philippines
5 Minutes after first Eruption
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Mt.
Pina
tubo
, Phi
lippi
nes
Mt.
Pina
tubo
: 7 m
inut
es a
fter
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Mt.
Pina
tubo
, Phi
lippi
nes
Mt.
Pina
tubo
: 10
min
utes
afte
r
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17.2 Kind of Volcanoes• Shield Volcano Magma rich in iron and
magnesiumVery fluidLava flows great distances
Eruption mildEruption occur several timesLava produces gently sloping
mountain
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17.2 Kinds of Volcanoes• Composite Volcano
Made up of alternating layers of ash, cinders and lava
Magma is thicker Gases are trapped in the
magma making explosive eruptions
Typically thousand meters high
Steeper cones than shield volcanoes
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17.2 Kinds of Volcanoes• Cinder Cone
Smallest and most abundant volcanoes
Tend to be active for a short time then become dormant
Vast quantities of ash and lava fall around vent that form the cone
Gas-trapped magma – explosive eruption
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17.2 Earthquakes and Volcanoes• Kinds of Volcanoes
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