An earthquake with a preliminary magnitude of 5.5 hit parts of Iwate prefecture in northeastern Japan late on Friday, the Japan Meteorological Agency said.
The earthquake, which had an intensity of 5+ on Japan's 1-7 intensity scale, was 20 km deep, JMA said. No tsunami warning was issued.
The quake followed a powerful magnitude 7.4 quake that jolted the area late on Wednesday.
(Reporting by Chang-Ran Kim; Editing by Alex Richardson)
