2A. Which great earthquake in the last century confirmed a major principle of plate tectonic theory by showing that Pacific plate is sinking beneath the North America plate?
A. 1906 San Francisco earthquake
B. 1964 Great Alaska earthquake
C. 1960 Chile earthquake
D. 1944 Hawaii earthquake
E. None of the above
2B. The Japan tsunami in 2011 traveled from one side of the ocean basin to the other. Which answer below is the closest to the speed of this wave as it traveled over a seafloor with a water depth of 6000 meters?
A. 200 mph
B. 221 meters per sec
C. 300 mph
D. 242 meters per sec
E. 100 meters per sec