Why does the west coast of South America show a full range of earthquake depths?
Because the Nazca Plate is subducting beneath the South American Plate, producing shallow, intermediate and deep‑focus earthquakes.
What types of earthquake depths occur along the Peru–Chile trench?
Shallow, intermediate and deep‑focus earthquakes.
Where are shallow‑focus earthquakes most commonly found?
Mostly on plate boundaries
Which type of earthquake is most common worldwide?
Shallow‑focus earthquakes
Where are deep‑focus earthquakes typically found?
In regions with long, steep subduction zones, such as Japan and the Philippines.
Which country experiences the greatest range of earthquake depths?
Japan, one of the world’s most seismically active regions
In which three tectonic settings are volcanoes found?
Constructive boundaries,
Destructive boundaries,
Hotspots
What causes volcanic activity at hotspots?
The plate moves over a mantle plume, producing effusive, non violent eruptions
Do conservative margins produce volcanoes? Why?
No - because the plates slide past each other and do not create magma
Why are volcanoes rare at continental - continental destructive margins?
No subduction occurs so magma is not typically generated
What happens at a destructive oceanic - continental plate margin
Plates collide, the oceanic plate is subducted, causing explosive and destructive volcanoes and very violent earthquakes
What is formed at a destructive oceanic - continental plate margin
A mountain belt forms when plates collide
Why do conservative margins not produce volcanoes
conservative margins do no produce volcanoes because plates slide past each other without subduction or magma generation
Where are volcanoes found
Volcanoes are mainly found along plate boundaries and in certain active regions such as Asia and Iceland
Mid plate hotspot earthquakes
Minor up to magnitude 5.0-6.0
Mid plate Hotspot volcanoes
effusive nonviolent
Conservative continental - continental earthquakes
very violent up to magnitude 8
Conservative continental - continental volcanoes
none
Mid plate hotspot movement
plate moves over a rising plume of hot magma
Constructive oceanic - oceanic volcanoes
effusive non violent
Constructive oceanic - oceanic earthquakes
minor up to magnitude 5.0-6.0
constructive oceanic - oceanic movement
plates move apart
destructive continental - continental volcanoes
very rare, but devastating
destructive continental - continental earthquakes
very violent up to magnitude 8
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Tectonic Hazards24
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Tectonic Keywords59
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Plate Tectonic Theories10
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Hotspots5
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Hawaii2
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17.9.248
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Volcanoes22
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Eyjafjallajökull, Iceland5
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Haiti11
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Christchurch11
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Hazard Profiles10
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Development And Governance2
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Parks Model7
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Causes Of Tectonic Hazards12
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Hazard Adaptation + Mitigation18
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Coasts127
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Water Cycle11
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Coast25
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Tectonics49
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4.2.26 Keyword Test11
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Carbon31
