Earthquakes Flashcards
Layers of the earth
Crust
Mantle
Outer core
Inner core
Continental crust 3 features
Granite
Lighter
Older
Oceanic 3 features
Basalt
Heavier
Younger
What part of earth do cc form
Mantle
Why do cc form
For the plates to move
Constructive and destructive hazards
Volcanoes and small earthquakes
Collision and conservative hazards
Earthquakes only
What is an earthquake
Earthquakes are vibrations by earth movements at plate boundaries and at motor fault lines
Where are most severe earthquakes
Conservative and destructive
Focus
The point under the ground that the shock waves originate from
Epicentre
The point kn the griund directly above the focus of an earthquake where the vibration is greatest
Magnitude
The anount of energy an earthquake gives out
Richter scale
The magnitude of an earthquake can be measured using richter scale.each point on the scale is 10x bigger than below
Seismograph
An instrument that measures the shaking of the griund to record the strength of an earthquake. It records the vibrations on a traph called a seismogram.
Seismic waves
The energy from an earthquake traveling through
Mercalli scale
Measures - Effects by earthquake
Measuring tool - Observation
Scale - 1 not felt xii total destruction
Richter scale
Measuring tool - seismograph
Measures - energy released
Scale - 2 to 10
What is a tsunami
A single wave or more often a series of waves generated by a sudden movement of water in the ocean
What triggers tsunamis
A sudden displacement of a body of water in the ocean
Asian tsunami case study background facts
Date - 26th december 2004
Magnitude - 9.1
Depth - 30km
Social impacts asian tsunami
Death toll - 277,898
People displaced - 1.7 million
Villages destroyed - over 1500
Economic reasons asian tsunami
Economic damage - 10.7 billion
Buildings damaged - 460,000
Damage to industries - fishing decreased and tourism by 80%
Environmental impacts asian tsunami
Damage to ecosystem
Water pollution
Liquid waste
Responses immediate and long term asian tsunami
Immediate - 13.6 billion dollars was raised in international aid
Long term - Tws set up in indian ocean
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