Changes Due To Earthquakes

• The Earth consists of different layers

  1. Crust - The first layer or the surface belongs to the crust. this layer is made up of several large and small plates.
  2. Mantle - The widest layer of earth and is made up of magma.
  3. Core - The central layer of Earth and is divided into a liquid layer called the outer core and a solid layer called the inner core
• Earth's layers


  • Crust - surface layer made up of large and small plates
  • Mantle - widest layer made up of magma
  • Core - central layer divided into liquid outer core and solid inner core
• Earthquakes


  Shaking of the ground
• Earthquakes happen when


  1. Crustal plates move

  2. Nearby rocks move and break

  3. Rocks slide past each other

  4. Waves of energy are released and sent out through Earth

  5. Waves trigger earthquakes
• Seismograph


  Instrument that measures the motion of the ground during an earthquake
• Earthquake strength


  Measured in terms of magnitude and intensity
• Magnitude


  Amount of energy released by an earthquake from its focus
• Focus


  Break in the ground caused by the pressure of moving rocks, where the earthquake originates
• Epicenter


  The ground above the focus
• Richter scale


  Used to measure an earthquake's magnitude
• History records from 1589 to the present show that our country is constantly hit by earthquakes
• This is due to our country's location in an area where crust plates are weak
• Circumpacific Belt or Pacific Ring of Fire


  Area where our country is located
• Earthquake occurs when there are sudden movements along fault lines.