Strong Earthquake Shakes Japan North East of Tokyo:
AP. UPDATE: A strong earthquake has shaken Tokyo and other cities in eastern Japan. The Asahi Shimbun, May 16, 2016, http://www.asahi.com/ajw/articles/AJ201605160068.html
The Meteorological Agency said the earthquake had an initial magnitude of 5.6 and hit Monday evening in southern Ibaraki prefecture, about 100 kilometers northeast of Tokyo.
Perhaps that is why Fukushima looks so much worse today than yesterday, with very high atmospheric emissions visible on TEPCO cam 1: