Earthquakes 1.4 GCSE Geography Edexcel

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  • Earthquakes
    • Measuring Earthquakes
      • Earthquakes are measured using the moment magnitude scale.
      • The moment magnitude scale measures the magnitude of an earthquake by measuring how much energy is released by an earthquake.
    • Shock (Seismic waves)
      • Energy is released from the focus in shock waves (called seismic waves)
      • The most damage will occur at the plates where the shock waves are strongest (closest to the epicentre)
    • Epicentre
      • The most damage will occur at the plates where the shock waves are strongest (closest to the epicentre)
    • Focus
      • The focus is on where the pressure is released underground and where energy radiates out from
      • This is the place with the strongest waves that can cause the most damage
    • Happen on all three plate margins
    • Earthquakes are the sudden violent shaking of the ground

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