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CALIFORNIA’S STORM HAZARDS

CALIFORNIA’S STORM HAZARDS. MUDFLOWS - A mudflow often starts in a depression on a steep hillside. At first, a mudflow moves fairly slowly-about 16 kilometers per hour. But as the mud engulfs more and more loose debris, it picks up speed.

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CALIFORNIA’S STORM HAZARDS

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  1. CALIFORNIA’S STORM HAZARDS • MUDFLOWS- • A mudflow often starts in a depression on a steep hillside. • At first, a mudflow moves fairly slowly-about 16 kilometers per hour. • But as the mud engulfs more and more loose debris, it picks up speed. • At top speed, a mudflow can move nearly 60 kilometers per hour, destroying everything in its path. • FLOODING- • Flooding Is another California storm hazard. • Some of the state’s floods are regional floods. • Some flooding in California occurs when excessive rainfall causes dams and levees to fail.

  2. CALIFORNIA’S EARTHQUAKE HAZARDS • TSNUNAMIS – • Is a wave formed when the ocean floor shifts suddenly during an earthquake. • As a Tsunami nears land and begins to break, the Tsunami can grow to enormous size. • A Tsunami gains speed as it gets closer to land • A Tsunami acts like a wall of water • SIESMIC SHAKING – • Is a measure of how much ground movement occurs during an earthquake. • Seismic Shaking reflects the behavior of an earthquake’s seismic waves. • Can cause buildings, freeways and structures to collapse

  3. CALIFORNIA’S EARTHQUAKE HAZARDS • LIQUEFACTION – • Occurs when water-soaked soil turns to a thick, soupy liquid during an earthquake • As liquefaction takes place, buildings and other structures quickly collapse into soft mud.

  4. CALIFORNIA’S EARTHQUAKE HAZARDS • LANDSLIDES – • Occur on steep slopes where sediment is loose or where rocks are highly fractured. • Earthquakes can also cause landslides in areas that are underlain by weak soils.

  5. CALIFORNIA’S VOLCANIC HAZARDS • VOLCANIC ASH – • the dust that comes off the burning rock of the volcano. • Can be harmful to plant, animal and human respiratory system • Can block incoming solar radiation that is needed to survive

  6. CALIFORNIA’S VOLCANIC HAZARDS • LAVA FLOWS – • Lava flow is produced when lava breaks through the surface of a volcano and starts to travel down the sides. • Lava flows can destroy whole villages and help create new land masses.

  7. CALIFORNIA’S VOLCANIC HAZARDS • VOLCANIC GASES- • Magmatic gases and high-temperature volcanic gases, • Low-temperature volcanic gases and hydrothermal systems, • Non-explosive volcanic gas release

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