TOKYO (AP) _ Two undersea earthquakes jolted Japan on Sunday, but there were no reports of damage, injuries or tsunamis _ the huge waves that can be caused by such disturbances.

The first quake, with a preliminary magnitude of 5.8, struck at 6:54 a.m. just below the seabed off the coast of Fukushima province, Japan's meteorological agency said. Fukushima is located 149 miles northeast of Tokyo.

At 2:05 p.m., a magnitude 4.3 quake occurred about 12 miles below the seabed in the Pacific Ocean about 62 miles southwest of Tokyo. It shook Tokyo and nearby cities but caused no damage.

A magnitude 5 quake can cause damage to homes if it occurs in a residential area, and a magnitude 6 tremor can result in severe damage.

Japan sits atop four tectonic plates _ slabs of land that move across the earth's surface _ making it one of the world's most earthquake-prone nations.