As my heart and prayers go out to the Japanese, do not forget that God is sovereign and working out his plan perfectly, Amos 3:6, do not attribute disaster to bad luck or nature but take note God is at work in sovereign wisdom and men should act and react accordingly to his judgment. May this working of God remind us of God and His power creating awe, submission, and repentance.
Many times in order to prevent misunderstanding God revealed to prophets his own view of various events or disasters. At times God chose to reveal his purposes and even actions so that those events or disasters could be interpreted correctly.
God has a plan and a purpose in the earthquake that took place in Japan and for all those which take place around the world. God does not always choose to reveal his secret plan or purpose but be assured these events are not random or merely caused by "actions in nature." God will use various means to work out his eternal purpose. Our responsibility is recognize the power of God and submit to him.
A Prayer by John Piper in Response to This Disaster