WWW Extra Credit Assignment
PNW EARTHQUAKE - The BIG ONE - 03S

The purpose of this assignment is to help you become more familiar with the concept of great Cascadia Subduction Zone earthquakes.
Remember, the purpose of this assignment is to improve your understanding of this important concept, not just to get some extra credit points.
Because the following sites contain many images you may find that they load faster using on-campus computers.

Click on the links below to go to the sites.

Site #1: Anniversary of The Megathrust Earthquake of 1700

Site #2: Earthquake hazards - Oregon Dept. of Geology & Mineral Industries

Site #3: Great Cascadia Earthquake Penrose Conference

Site #4: CVO Website - Plate Tectonics and the Cascade Range - Map

Be sure to study the excellent diagrams on these sites.

Turn in your answers to the following questions.

1. What is the Cascadia subduction zone?

2. What is meant by a great subduction zone earthquake?

3. What is the evidence of great subduction zone earthquakes?

4. When did the last great earthquake occur in the Pacific Nothwest?

5. What is the evidence that enables geologists to state the time and date of this last great subduction zone earthquake?

6. What are the three sources of earthquakes that can effect residents of our region?

04/18/03 David Cordero
dcordero@lcc.ctc.edu

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