California’s Natural HazardsVolcanoes, Landslides, and Floods
Presenters: Steven, Bryan, and Leo
-Earthquake triggers eruption-Pressure pushes magma up chamber-Volcano has an eruption
5 potentially ( possibility ) active volcanoes
Medicine Lake – Last activity 900 years ago
Mount Shasta - 1786Clear Lake – 10,000 years
agoLassen Peak - 1921Long Valley – 1750’sCoso – 2.5 million years ago
Seismic activity near volcanoes means, might have an eruption
Get breathing masks and goggles
Get out of the volcanoes area
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.
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
Next to riversWhere there is bad weather Areas below sea level
Natural weather disaster Most dangerous floodpower of a flood with incredible speed and unpredictability.
Dams and levees brake
Definition: Movement of slope Important Factor: Gravity
Major Types Creep ( to slip or
gradually shift position) and Slump (to fall or sink suddenly.)
Explanation of CausesConstructionEnvironmentalMan-Made
Building Drainage pipesReforestation (the action of renewing
a forest)Careful Planning: When building near
slopes and hazardous areas