California earthquake warning: 6.3 magnitude quake rocks US East Coast amid Big One fears A MASSIVE 6.3 magnitude earthquake has struck off the coast of California as the Ring of Fire continues to show signs of increased activity. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Is it the end of the world? Doomsday Clock likely to move closer to midnightNew Findings Could Save Lives of More Stroke PatientsArianespace launch: When is Ariane Flight VA241? Date, time and how to watch the launchYes, They’ve Cloned Monkeys in China. That Doesn’t Mean You’re Next.What is the Doomsday Clock? Why is the clock set to move closer to midnight tomorrow?Doomsday Clock LIVE stream: How to watch nuclear apocalypse announcement online TODAY