The quake occurred off the coast of Sanriku in northern Japan at around 4:53 p.m. local time, at a depth of about 6 miles below the sea surface.The quake occurred off the coast of Sanriku in northern Japan at around 4:53 p.m. local time, at a depth of about 6 miles below the sea surface.
7.5-magnitude earthquake strikes off Japan, tsunami alert issued
