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Transcript of Shadow Zone &
![Page 1: Shadow Zone &](https://reader036.fdocuments.in/reader036/viewer/2022072015/56813075550346895d965375/html5/thumbnails/1.jpg)
Shadow Zone &
Locating an Epicenter
![Page 2: Shadow Zone &](https://reader036.fdocuments.in/reader036/viewer/2022072015/56813075550346895d965375/html5/thumbnails/2.jpg)
1. This is a wide belt around earth on the side opposite the focus in which no seismic waves are received.
2. Is it caused by refection or refraction?
3. What type of graph is used to find the distance to the epicenter?
4. What happens to the lag time as the waves get further from the epicenter?
5. How many seismic stations are required to find an epicenter?
![Page 3: Shadow Zone &](https://reader036.fdocuments.in/reader036/viewer/2022072015/56813075550346895d965375/html5/thumbnails/3.jpg)
1. Shadow Zone
![Page 4: Shadow Zone &](https://reader036.fdocuments.in/reader036/viewer/2022072015/56813075550346895d965375/html5/thumbnails/4.jpg)
1. This is a wide belt around earth on the side opposite the focus in which no seismic waves are received.
2. Is it caused by refection or refraction?
3. What type of graph is used to find the distance to the epicenter?
4. What happens to the lag time as the waves get further from the epicenter?
5. How many seismic stations are required to find an epicenter?
![Page 5: Shadow Zone &](https://reader036.fdocuments.in/reader036/viewer/2022072015/56813075550346895d965375/html5/thumbnails/5.jpg)
2. refraction
![Page 6: Shadow Zone &](https://reader036.fdocuments.in/reader036/viewer/2022072015/56813075550346895d965375/html5/thumbnails/6.jpg)
1. This is a wide belt around earth on the side opposite the focus in which no seismic waves are received.
2. Is it caused by refection or refraction?
3. What type of graph is used to find the distance to the epicenter?
4. What happens to the lag time as the waves get further from the epicenter?
5. How many seismic stations are required to find an epicenter?
![Page 7: Shadow Zone &](https://reader036.fdocuments.in/reader036/viewer/2022072015/56813075550346895d965375/html5/thumbnails/7.jpg)
3. Time-travel graph
![Page 8: Shadow Zone &](https://reader036.fdocuments.in/reader036/viewer/2022072015/56813075550346895d965375/html5/thumbnails/8.jpg)
1. This is a wide belt around earth on the side opposite the focus in which no seismic waves are received.
2. Is it caused by refection or refraction?
3. What type of graph is used to find the distance to the epicenter?
4. What happens to the lag time as the waves get further from the epicenter?
5. How many seismic stations are required to find an epicenter?
![Page 9: Shadow Zone &](https://reader036.fdocuments.in/reader036/viewer/2022072015/56813075550346895d965375/html5/thumbnails/9.jpg)
4. The lag time INCREASES as distance from the epicenter increases.
![Page 10: Shadow Zone &](https://reader036.fdocuments.in/reader036/viewer/2022072015/56813075550346895d965375/html5/thumbnails/10.jpg)
1. This is a wide belt around earth on the side opposite the focus in which no seismic waves are received.
2. Is it caused by refection or refraction?
3. What type of graph is used to find the distance to the epicenter?
4. What happens to the lag time as the waves get further from the epicenter?
5. How many seismic stations are required to find an epicenter?
![Page 11: Shadow Zone &](https://reader036.fdocuments.in/reader036/viewer/2022072015/56813075550346895d965375/html5/thumbnails/11.jpg)
5. 3