AS you all know disaster struck japan on march 11th,2011. World was abuzz about the relief efforts being carried out in japan. After the disaster, there was a significant increase in blogs,statues,tweets about ongoing situation in japan.Here is a cool website that visualized the impact of japan's disaster on social networks versus the radioactive intensity.
It is a known fact that after the reactor cover blasted off, there was a significant amount of radioactivity leakage. This impact was clear on many of the neighboring countries and for that matter impact was sever in Japan itself.
Below are certain mile stones according to that website.
March 11, 2011 A 9.0 magnitude earthquake strikes off the coast of Japan. The earthquake triggered an extremely destructive tsunami with waves of up to 37.9 meters.