1. Tsunami “harbour wave” in Japanese

2.   A series of ocean waves generated by a large-scale disturbance   Most are generated by vertical movement such as subduction zones   Watch clip and answer a.) what can trigger a tsunami?   http://videos.howstuffworks.com/howstuffwo rks/230-how-tsunamis-work-video.htm http://videos.howstuffworks.com/howstuffwo rks/230-how-tsunamis-work-video.htm

3. Tsunami Wavelengths  Tsunamis arrive as a series of waves (usually 10 – 60 min)  Waves are 1 meter high in open ocean, and 6 – 15 meters high along coasts

4. Tsunami WARNINGS  Coastlines can channel waves, i.e Japan and Hawaii  Ocean basin topography can slow a tsunami down (friction)

5. Tsunami Speed – controlled by Ocean depth. In less than 24 hours, a tsunami can cross the entire Pacific Ocean. (Source owlnet.rice.edu)

6. Watch clip and answer.  1. What are some warning signs for a tsunami?  2. What is ‘drawdown’ and how does it work?  https://www.youtube.com/watch?v=GjpRRJZJcEw https://www.youtube.com/watch?v=GjpRRJZJcEw

7. Photographs of 2004 Source: newxspotters.com

8. Tsunami Warning System Pacific Warning Centre http://www.prh.noaa.gov/ptwc/ http://www.prh.noaa.gov/ptwc/

9. 1.) Sensor on ocean floor detects pressure change) is sent to buoy 2.) message (on ocean surface is received 3.) message sent to satellite 4.) Satellite informs warning centre