One shook the Ibaraki Prefecture mid-morning Monday registering a 5.0 on the Richter scale, Kyodo news reported.

FORBES: China Stocks Resilient Early Monday While Nikkei Below 10k

Measurements at another nuclear-power complex in the prefecture of Ibaraki, halfway between Fukushima and Tokyo, showed elevated radiation readings, officials said.

WSJ: Japan's Nuclear Crisis Escalates

Localities including Tokyo and nearby Saitama and Ibaraki prefectures were reporting elevated levels of radiation Tuesday morning, though too low to cause injury.

WSJ: Japan's Nuclear Crisis Escalates

The embassy in Tokyo and the Chinese consulate in Niigata are sending buses to Miyagi, Fukushima, Ibaraki and Iwate prefectures to pick up Chinese nationals, according to the Embassy.

FORBES: Connect

By their reckoning, there was a 99% chance of an earthquake of magnitude 8.0 occurring off the Miyagi coast, and a 90% chance of one off Ibaraki prefecture, within the next 30 years.

ECONOMIST: The myth and reality of the Japanese earthquake

Food production in the most contaminated regions, the researchers write, is likely to be "severely impaired", and that Fukishima's neighbouring regions, such as, Iwate, Miyagi, Yamagata, Niigata, Tochigi, Ibaraki, and Chiba are likely to also be affected.

BBC: Fukushima fallout fears over Japan farms