Californias Natural Hazards Volcanoes Landslides and Floods Presenters

California’s Natural Hazards Volcanoes, Landslides, and Floods Presenters: Steven, Bryan, and Leo

What causes a volcanic eruption? -Earthquake triggers eruption -Pressure pushes magma up chamber -Volcano has an eruption

Where Active Or Potentially Active Volcanoes? 5 potentially ( possibility ) active volcanoes Medicine Lake – Last activity 900 years ago Mount Shasta - 1786 Clear Lake – 10, 000 years ago Lassen Peak - 1921 Long Valley – 1750’s Coso – 2. 5 million years ago

What Can We Do To Help Prevent or Prepare For Eruptions? Seismic activity near volcanoes means, might have an eruption Get breathing masks and goggles Get out of the volcanoes area

floods A flood is the submerging ( to put underwater ) with water of a normally dry area. Floods are caused by many things, including rainstorms, slow water run-off, earthquakes, broken dams, underwater volcanic eruptions and tsunamis, or hurricanes.

Cause of flooding floods are a natural consequence of stream flow in a continually changing environment caused by precipitation, which is caused by weather For example, heavy snow melts, water saturated ( unable to absorb or dissolve ) ground, unusually high tides, and drainage modifications ( to change ) when combined with heavy rain can lead to flooding

Areas prone to floods Next to rivers Where there is bad weather Areas below sea level

Flash flood Natural weather disaster Most dangerous flood power of a flood with incredible speed and unpredictability. Dams and levees brake

Definition: Movement of slope Important Factor: Gravity Landslides

Mass Movements Major Types Creep ( to slip or gradually shift position) and Slump (to fall or sink suddenly. )

Causes of Landslides Explanation of Causes Construction Environmental Man-Made

How can we avoid Landslides? Building Drainage pipes Reforestation (the action of renewing a forest) Careful Planning: When building near slopes and hazardous areas