When people's flow in the city center of 3.11 is reproduced with light flow, the light disappeared from Tokyo

Tohoku district Pacific offshore earthquake occurred at 14:46, 18.1 seconds on March 11, 2011, but the flow of people in the Tokyo metropolitan area from March 11 to March 12 the next day will be based on GPS data of the mobile phone A movie reproduced by the light flow is released on YouTube.

Current situation of people on the day of the Great East Japan Earthquake by congestion statistical data (R) - YouTube


On March 11, the flow of people past 4 o'clock in the morning is like this. The screen is dark enough to confirm the flow of light slightly.


At 6 o'clock the flow of light came to be seen little by little.


At 8:20, when the rush hour, the amount of light is at its peak.


11: 15. I felt a little calm.


14: 10. The flow of people increases a little when lunch passes.


Then, 14:46:40 seconds after 22 seconds since the earthquake occurred at 14:46:18. No particular change at this time.


14:48. Two minutes have elapsed since the earthquake occurred, the flow of light is visible and weakened from this time.


After 14:50, the outlines of the light which had become clear became ambiguous, and the difference from before the earthquake occurred is obvious.


And after 15 o'clock the flow of light is completely stagnant.


Evening at 18. There is little light flow yet.


It recovered little by little at 23 o'clock. Before the earthquake occurred, the light was moving in various directions, but at this point most of it is headed outward.


Next morning at 3 am.


It's seven in the morning. About 16 hours after the earthquake occurred, it finally returned to the usual flow.


This is done by the Spatial Information Science Research Center of the University of TokyoPeople flow projectA picture made by. For productionZenrin DatacomCongestion statistics (statistical data conducting confidentiality processing so that individuals are not identified based mainly on the data acquired by NTT DoCoMo's GPS function) was used.

People flow project | Visualization case
http://pflow.csis.u-tokyo.ac.jp/visualization.html