51 tohoku earthquake megathrust earthquake a what is

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51. Tohoku earthquake (megathrust earthquake)a.What is a megathrust earthquake)b.Subduction zones52. Tsunami early warning systemsa.What is it53. Earthquakes and seismic wavesa.Identify focus, epicenter, fault scarp54. Elastic rebound theorya.Explain earthquake rupture mechanism55. 3 types of seismic waves
a.P wavesb.S wavesc.Surface wavesd.Velocities (which arrive faster)e.Characteristics (movements of materials)56. Locating earthquakesa.Seismographs used to located p and s waves57. Earthquake magnitudea.3 different types58. Direction of fault motiona.Look at chart59. Where do earthquakes occura.Ring of fireb.Plate tectonic settings60. Seismicity and plate boundariesa.Look at picture61. Tsunami wavesa.How they can become so largeb.Relative speed of tsunami waves compared to p and s waves62. Earthquake predictiona.Can’t predict just yetb.Frequency of earthquakes63. Structure of eartha.Physical and chemical characteristics of each layer64. Information gathered from meteorites, upper mantle, and lab experiments65. Seismic wave velocitiesa.Density, temperature, composition66. Seismic wave reflection and refraction67. P wave path through interior
68. S wave path through interior
69. Velocity profiles of earth's interior
70. Earth has iron core71. Earth’s internal temperaturea.Conductionb.Convectionc.Radiative
72. Geotherm of earth’s interior
b.Effect at surface73. Earth’s magnetic fieldsa.Power geodynamo fields74. Magnetic reversalsa.What are frequencies75. 3D imaging of earth’s interior76.
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Term
Spring
Professor
LASSITER

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