An Introduction Christopher Lembo Earthquake Footage Why Earthquakes

An Introduction Christopher Lembo

Earthquake Footage

Why Earthquakes happen �Earthquakes happen when � One tectonic plate slides over another plate � One tectonic plate slides against another plate � A volcano erupts � A rift forms

Where are most Earthquakes Located?

Why are Most Earthquakes in Those Areas? �Earthquakes are located near where plate boundaries meet. . These plate boundaries have faults located near or on them.

World Tectonic Plate Boundaries

What is a fault? �A fault is a location where rock has fractured and one side has moved relative to the other. � There are three types of faults �Strike Slip-where one section of rock slides left or right in relationship to the other section of rock �Normal-where one section of rock slides under another section of rock �Thrust-where one section of rock pushes up over another section of rock

Types of faults

Earthquakes and Damage �Earthquake damage can be severe or slight depending on: � The value of the property and number of buildings above the earthquake � The type of rock in which the earthquake occurred � The depth of the earthquake Example of what an � The duration of the earthquake could sound like in your home

How Damaging can Earthquakes be compared to other disasters? Cost in Billions of Dollars 60 50, 3 50 40 30 20 10 0 1 2 1987 1993 Winter Southern Narrows California Earthquake Fires 3, 3 3, 7 4 8, 9 1991 1971 San 1995 1989 Loma 1994 Oakland Fernando Statewide Prieta Northridge Fires Earthquake Flooding Earthquake

Summary � Earthquakes are caused by tectonic plates shifting, volcanoes erupting and by rifts forming. � Most earthquakes happen at regions where tectonic plates meet. � Faults are locations where rock is fractured and one region is moving relative to the other. � There are three types of faults; Strike-Slip, Normal, and Thrust faults. � Earthquake damage varies depending on what type of rock the earthquake occurred, values of property, duration of the earthquake, and depth of the earthquake.

Quiz time! �What causes an earthquake to happen? � A. Tectonic plates shifting � B. Storms � C. Fires � D. Wars Next Question

Quiz #2 �Which of these is not an example of a type of fault? � A. Strike-Slip � B. Thrust � C. Forward � D. Normal Next Question

Quiz #3 �What can make an earthquake more damaging? � A. The type of fault � B. The time of day � C. The weather conditions � D. The duration of the earthquake To the Credits

Correct

Incorrect

Credits: � Earthquakes: An Introduction. Rainbow Educational Media (1995). Retrieved March 10, 2009, from Discovery Education: http: //streaming. discoveryeducation. com/ � EARTHQUAKE : INTERIOR EARTHQUAKE RUMBLE STRESS CRACKS AND VARIOUS CRASHES DISASTER. Discovery Education (2009). Retrieved March 10, 2009, from Discovery Education: http: //streaming. discoveryeducation. com/ � Pictures courtesy of: The United States Geological Survey http: //earthquake. usgs. gov/learning/teachers. php