USGS
The 6.1-magnitude quake struck roughly 175 miles east of the shuttered Fukushima nuclear plant - at roughly 2:30 a.m. local time, according to the US Geological Survey.
USGS
The country is influenced by the slipping and sliding of several of Earth's tectonic plates, including the North America plate, Pacific plate, Philippine Sea plate, and Eurasia plate. Whenever these chunks of crust grind or butt up against one another, earthquakes happen.
Over the past century, Japan has been struck by nine earthquakes, each of which have killed more than 1,000 people.
This story is being continuously updated.