california geology where are the hazards? science std: geo # 9b
TRANSCRIPT
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California Geology
Where are the Hazards?
Science Std: Geo # 9b
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California has a variety of hazards
Active Fault Zones
Active and Dormant Volcanoes
Uplifted Areas with Weak Rocks
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California has a variety of hazards
We even have hazards that start outside California
Costal erosion Tsunamis
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California has a variety of hazards
Where are these hazards?
And what causes them?
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Earthquakes
If we take a closer look at our area….
We see faults all around us
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Earthquakes PlanningStructure Survival
Engineers would like to make every building earthquake-proof, but can't because it's too expensive.
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Earthquakes PlanningStructure Survival
Most buildings should be earthquake resistant to avoid deaths.
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Earthquakes PlanningStructure Survival
And not only buildings – but roads and bridges should be made earthquake resistant – not earthquake proof
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Earthquakes PlanningPeople Survival
Earthquake Kit
You should have a kit ready should there be an earthquake
But what is in an earthquake kit?
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Earthquakes PlanningPeople Survival Into each kit you should put..
•Water and food to last at least three days (your car trunk is a handy place for these bulky items)•Water purification tablets•Heavy-duty gloves•A first-aid kit•A minimum of $100 in cash (automated teller machines and banks may be shut down following a quake)•Family photos and descriptions (to aid emergency personnel in finding missing people)•A flashlight and portable (or solar-powered) radio•Extra batteries•Goggles and dust mask•A personal commode with sanitary bags
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Earthquakes PlanningPeople Survival The most important item is….
Water….
You should have a minimum of 5 gallons stored somewhere
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Earthquakes PlanningWhat about when we are planning for new areas?
Would it be better to build tall buildings….
…or flat park land…..
…in an area that has earthquakes?
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VolcanoesWe know about the volcanoes up north
These are part of the Cascade Mountain Range
Where do they happen?
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VolcanoesBut did you know about the volcanoes closer to here?
Near Los Angeles is Lavic Lake
And farther east are the Coso Field Lava Domes
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Uplifted Areas with Weak RocksWhat is the hazard here??? Landslides
Weak rock under the surface cracks and splits
When the rocks split, the surface gives way
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Coastal Erosion
Coastal erosion is just that – erosion that happens on the coast
Waves pound against the shore and wash away the rock and sand
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Tsunamis
A tsunami is a huge wave that is caused by an earthquake or other seismic action
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Tsunamis
But how does a tsunami form?
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Tsunamis
It could happen due to an earthquake at the convergent zone near Washington
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