Another big one on the way in Japan?

[bjdeming]

Not that today's magnitude 6 and the recent 6.8 and 7-somethings are small.

This is from a credible source, and they sum it up nicely in the tweet but do check out the article, too.

 

[Mike S]

I had no idea aftershocks could occur so long after the main event

 

[KoD]

Me neither. I guess it makes sense given the immensity of plate tectonics and their incredibly slow movement.

 

[bjdeming]

I think it surprised scientists, too, which is why it got big headlines. This region, well, if Earth were a ball of yarn, this would be a BIG tangle. Seismic events like these help them untangle it.

Of course, there's probably also concern because of all the radioactive water stored at the wrecked Fukushima plant, but those storage barrels can likely handle another big one. The original power plant, though, and the fuel assemblies in Units 1 and 2? I haven't read anything about a new sea wall there, either.