Occurance of Earthquakes

Descrição

Leaving Cert Geography (Physical Geography) Mapa Mental sobre Occurance of Earthquakes, criado por Tom Cahill em 27-10-2013.
Tom Cahill
Mapa Mental por Tom Cahill, atualizado more than 1 year ago
Tom Cahill
Criado por Tom Cahill quase 11 anos atrás
58
1

Resumo de Recurso

Occurance of Earthquakes
  1. Plate Tectonics (Theory)
    1. lithosphere consists of large, rigid sections called plates
      1. Convection Currents - driving force
    2. Earthquakes
      1. Sudden release of energy on earths surface
        1. vibrations or shocks
      2. Plates
        1. Jam or stick together
          1. build up of stress in rocks
            1. stress releases - plates slip
              1. seismic waves
          2. Shallow Focus (<70km)
            1. passive boundaries
              1. Pacific and N. American
              2. smaller magnitude than deep focus
                1. account for 75% of earthquakes
                2. Deep Focus (300km)
                  1. convergent
                    1. heaviest plate is subducted
                    2. Indian and Eurasian

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