1. When was the first earthquake detection instrument invented?
 
 
 
 
 

 
2. If a seismograph station has 3 pendulums, at what orientation are they placed for maximum sensitivity?  What four measurements can scientists estimate from this setup?
 
 
 
 
 

 
3. What are the differences and similarities between tidal waves and tsunamis?
 
 
 
 
 
 
 
 

 
4. Explain what happens when a tsunami approaches then just reaches the coast.
 
 
 
 
 
 
 

5.    What are the similarities and differences between wind generated and tsunami waves?