After the 9.0 magnitude earthquake and tsunami ravaged Japan, hundreds of thousands of people have signed up for a new emergency warning app for their iPhones; when an earthquake is predicted to hit, the iPhone app, called Yure Kuru, will send out an alert and let subscribers know when the quake is coming, where the epicenter is located, and how bad the shaking will be; the app was developed by Tokyo based RC Solution Co., which specializes in mass alert systems and spreading information in the event of an emergency; since the 11 March earthquake, the company’s subscribers have sky rocketed from 100,000 to more than 1.5 million