An earthquake with a preliminary magnitude of 5.5 shook eastern Japan including Tokyo on Tuesday, causing some disruptions to the country's transportation services, but no tsunami warning was issued.The focus of the 7:46 p.m. quake was in Ibaraki Prefecture northeast of Tokyo at about 50 kilometers underground, according to the Japan Meteorological Agency.No damages or injuries were reported, the Fire and Disaster Management Agency said.The earthquake logged lower 5 on the Japanese seismic intensity scale of 7 in neighboring Gunma and Saitama prefectures, and 4 in Ibaraki.Bullet train servi…READ FULL ARTICLE