An earthquake with a preliminary magnitude of 5.8 hit the southwestern Japan prefectures of Kumamoto and Oita on Tuesday, with the country's weather agency warning the public to remain on alert for about a week for possible similar or stronger quakes.No tsunami warning was issued, after the quake occurred shortly after 6 p.m. and originated in Kumamoto's Aso area. The quake registered upper 5 on the Japanese seismic intensity scale of 7 in Ubuyama, according to the Japan Meteorological Agency.Upper 5 is defined as a level at which many people find it difficult to walk.The quake registered l…READ FULL ARTICLE