A 5.6 magnitude earthquake has shaken Japan's capital Tokyo just before 2:30 p.m. local time Monday.
The epicenter hit the Saitama prefecture, and was felt in the surrounding areas of Tokyo, according to Japan's Meteorological Agency. It measured 50km deep, but no tsunami alert has been registered.
There have been no immediate reports of damage or injuries, but the quake shook buildings and caused the subway to halt. Tokyo's mobile phone warning system alerted residents throughout the city.
In 2011, Japan suffered a devastating earthquake and tsunami, which killed almost 20,000 people and caused a meltdown at the Fukushima nuclear plant.