As Sun Storms Ramp Up, Electric Grid Braces for Impact

The tempest is what's known as a solar storm, a flurry of charged particles that erupts from the sun.Storms are brewing about 93 million miles (150 million kilometers) away, and if one of them reaches Earth, it could knock out communications, scramble GPS, and leave thousands without power for weeks to months. Read the Full Article at: NationalGeographic.com