Scientists have discovered a way to predict the eruptions of powerful solar magnetic storms aimed at Earth, giving civilization extra time to protect its growing networks of communications, power and other electronic conveniences. An international team of scientists reported their discovery that the appearance of a giant "S" etched in rays of the Sun's blazing halo, is a "reliable indicator" that, the site within days will launch a cloud of perhaps 10 billion tons of hot, electrically charged gas into space with the energy of a billion megatons of TNT.