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