A 7.1 magnitude earthquake hit off the coast of Fukushima, Japan, on Saturday, causing several injuries and leading to widespread power outages in the region.
Preparations must be made to minimize the impact of the predicted disaster, the nation says.
Devastating quake halts factory production; economic damage may exceed $10 billion.
'Race against time' for rescue operations with wind and rain forecast to get heavier on southern Japanese island.
A 54 centimeter robot with a scorpion-like tail will be sent inside one of Fukushima's reactors this August.