My new BSSA is in, and it's a big thick volume all about rotational seismology. And what do you know? I think it's all a crock! For hundreds of years people have looked at tombstones after an earthquake, and have seen them rotated. From that, they assume there is a strong rotational component to the seismic motion. I thought that was all debunked when they realized these things just walk that way through rocking, but no, this journal is full of those pictures!
Now, when it comes to building dynamics, rocking is very important, but this can be all figured out with multiple translational sensors, and some decent dynamic modeling. But here they make a big deal out of it. I'm just amazed.