At 1430JST much of the Eastern Sea Board of Japan was rocked with a large 7.0m Earthquake centered 486km to the South of Tokyo. No Tsunami Warnings have been issued by JMA and PTWC (Pacific Tsunami Warning Center) has issued a bulletin stating no pacific wide Tsunami is expected.
None the less many people in Japan were jolted by this earthquake today. The infrastructure of Japan though is built to withstand these types of earthquakes and damage should and is likely to be limited or none at all.
I do say though it was a scare and with memories of 3/11 still deeply implanted in our minds here in Japan this Earthquake was a short but quick shock and defiantly had a least myself on edge for a few seconds.
~Meteorologist Robert Speta