A shallow 5.9-magnitude earthquake struck off Japan`s northern island of Hokkaido on Monday, the US Geological Survey said. The moderate quake hit at a depth of eight kilometres, 107 kilometres northeast of Shibetsu. USGS said there was a low likelihood of casualties and damage. It comes after a powerful 6.6-magnitude quake in September rocked Hokkaido, triggering landslides, collapsing houses and killing more than 40. Japan sits at the junction of four tectonic plates and experiences a number of relatively violent quakes every year. But rigid building codes and strict enforcement mean even strong tremors often do little damage.