What the Fukushima

For a few hours on Monday, the world held its collective breath as an earthquake hit off the coast of Japan, and loud sirens warned residents of Fukushima to head for higher ground to avoid a potential tsunami. Luckily, the tsunami had lost its force before making it to land. Many observers were shocked that we’d see a quake and tsunami in the same region that had already been hit by an epic tragedy. But as Quartz explains, the latest earthquake in Japan was an aftershock of the one five years ago.