Striking at 14:46 local-time (12:46am EST) today, the earthquake is not only the largest Japan's ever suffered, but also in the world's top ten. After-effects in the form of tidal waves are expected to hit the US in just a few hours. Updated.
The north-east of Japan was hit the hardest, but it was felt in Tokyo too, some 400km away. Several smaller tremors were created off the back of the larger earthquake, along with 33 foot-high tidal waves and fires dotting the country.