Found this image that explains where Google gets all it’s hard drive space. This makes complete sense now. It might even be a fair jump to say that google is taking it’s adsense and adwords earnings and then digging… which in effect may be contributing to earthquakes around the world. So, the jump is “Adsense and Adwords are contributing to Global Earthquakes”
The users of gmail may very well never have known about their contributions to this problem either.