A magnitude 6.3 earthquake, measuring a lower 5 on Japan’s seismic intensity scale, struck the Tohoku region on Friday evening. There was no threat of a tsunami. The quake struck at a depth of 50 kilometers off the coast of Miyagi Prefecture at 8:22 p.m., following an emergency earthquake warning for the region. A lower 5 was registered in the cities of Tome, Osaki and Ishinomaki in Miyagi Prefecture. A swath of Miyagi and Iwate prefectures also saw the quake register a 4 on the Japanese scale. The Tohoku Shinkansen Line was temporarily suspended between Tokyo and Shin-Aomori stations following the quake, according to JR East, but trains were set to resume by around 10:40 p.m.…