We don't know when an earthquake will occur. It is also impossible to predict the injury toll. So the plan is to shake the computer screen without warning and let the user experience what it is like when everything collapses. This is for Japanese people who aren't prepared even on September 1st, Disaster Prevention Day.Firstly the banner shakes to make the user think it is a foreshock. Clicking on the advertisement starts a rumbling sound and the whole screen starts shaking. The characters collapse like the columns, floors, and walls of a building. And in the end, the banner falls down like a cupboard.