Shadow Zone &
Locating an Epicenter
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?
1. Shadow Zone
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?
2. refraction
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?
3. Time-travel graph
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?
4. The lag time INCREASES as
distance from the epicenter
increases.
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?
5. 3
What is the distance to the epicenter if
the arrival time for the P-wave is 7 min?
What is the distance to the epicenter if
the arrival time for the P-wave is 7 min?