How many severe tsunami events are mentioned in the passage

A．there would be a tsunami occurring after the quake
B．the monitoring equipment in the ocean has been in place
C．there was an earthquake of magnitude 9 in a few minutes
D．the regions were going to experience an enormous disaster

A．governments attach great importance to forecast the emergence of tsunami
B．people have noticed the danger of tsunami but done little to plan for it
C．there has been enough money to establish a constantly monitoring system
D．it's reasonable to raise millions of dollars to help those disaster areas