6.2 earthquake jolts Japan’s Hokkaido

A strong magnitude 6.2 earthquake struck Japan's Hokkaido island Monday, but the country's weather agency did not issue a tsunami warning, Kyodo News Agency reported.

The early morning quake registered upper 5 on the Japanese seismic intensity scale of 7 in the Tokachi region of the northern main island and occurred at a depth of about 83 kilometers (51 miles), according to the Japan Meteorological Agency.

Upper 5 is described as the level at which people find it difficult to walk without holding on to something.

There were no immediate reports of injuries or damage to infrastructure.

The weather agency ruled out links to an ongoing advisory about the risk of a powerful quake occurring in the region.

Authorities said that no abnormalities were observed at the Tomari nuclear power plant.

Some local train services in Hokkaido along the Pacific Ocean suspended operations, but the Hokkaido Shinkansen bullet trains were running as usual.

The quake came amid a weeklong advisory by the weather agency warning of an increased risk of a powerful quake following a magnitude 7.7 earthquake that struck the northeastern Japanese prefecture of Aomori a week earlier.

Hokkaido is among the seven areas where caution has been advised.