Media Summary: A magnitude 7.4 earthquake has ruptured off the east coast of A powerful 7.7-magnitude earthquake has struck NBC News' Dana Griffin reports on the significance of
Japanese Geophysicists Issue Megaquake Alert - Detailed Analysis & Overview
A magnitude 7.4 earthquake has ruptured off the east coast of A powerful 7.7-magnitude earthquake has struck NBC News' Dana Griffin reports on the significance of Dramatic CCTV footage of shaking cars, malls, and offices followed Monday's 7.6 quake off A powerful 7.5-magnitude earthquake struck Honshu, triggering tsunami
