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Earthquakes

Earthquakes

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Earthquakes

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  1. Shake, Rattle, and Roll Earthquakes Click to watch video

  2. Course Learning Objectives • Earthquakes • To be familiar with forces that causes earthquakes • To describe where earthquake waves begin and how they travel • To identify the causes of earthquake damage

  3. Causes of Earthquakes • Plate Tectonics • Landslides • Deep injection of water in to wells • Magma moving up toward the ground surface • Asteroids

  4. Earthquake Hocus Pocus • EQ weather • Time of Day • EQ Seasons • Astrology • Clash of the Titans • Etc.

  5. Earthquake Waves • Start at the Focus • Body waves • Can travel through the “body” of the Earth

  6. Earthquake Waves • Primary waves • Travel through solid and liquid (crust, mantle, core) • Fastest type of seismic wave • Secondary waves • Cannot travel through liquid (Earth’s outer-core) • Slower than P-waves

  7. Earthquake Waves • Surface wave • Begin at epicenter, not focus • Slowest type of seismic wave • Does the most damage to structures

  8. EQ Damage • Causes • Duration of Shaking • Ground shakes longer in higher magnitude EQ • Distance and depth of the EQ • Further away you are, usually the less damage • Liquefaction • The changing of a solid into a liquid during the period of strong ground shaking, kind of like quicksand • Quake lakes • Form when landslides block rivers causing flooding

  9. Learning Objects - Matching • The slowest type of seismic wave. • The fastest type of seismic wave. • The seismic wave that is slower than p-waves. • Explains earthquakes, volcanoes, and much more. • Earthquake waves begin at the _____. • The _____ is located on the Earth’s surface. • The changing of a solid into a liquid. • Form when land slides block rivers. • Is a one of the causes of earthquakes. • EQ Weather. • Asteroids • Epicenter • Focus • Hocus Pocus • Liquefaction • Surface waves • Plate Tectonics • Preliminary waves • Quake Lakes • Secondary waves

  10. Required Reading • The Science of Earthquakes • Plate Tectonics –Please complete activities and quizzes. • Volcanic Earthquakes • Earthquakes, Mega quakes, and the Movies