A major earthquake shook northern Japan on Saturday.

The magnitude 6.3 quake struck around 12:35 p.m. local time under the ocean about 400 miles north northeast of Tokyo.  The quake was 8.4 miles underground and did not produce a tsunami.

Because of the location of the quake, only a small amount of damage and minor injuries were reported.

Meanwhile, Japan’s nuclear regulatory commission said that the tsunami in 2011 was the cause of the damage and meltdown of the Fukushima nuclear power plant.  The massive earthquake did not cause enough damage to launch the plant into a meltdown.

The plant also announced last week they had made improvements that would now require an 89 foot wave to cause damage.