6.2 near Kaikoura.
It's that... long wave of it that makes me so unsettled. When an earthquake comes, tadum!-tadum!-tadum!, then although dishes rattle and it is generally much louder in the house, I also know that what is happening is quite nearby, and so it is probably not a big deal.
But when it comes like a big swinging ship, whoooompa-whoooooompa-whoooompa, and I see our book case swinging back and forth (anchoring it to the wall has been on the to-do list for two months!) but dishes hardly rattle at all, I know that it is coming from afar - and whoever is there, "afar", is probably not having such a whale of a time..
It went on for about half a minute.
Half a minute is a heck of a long time when it's an earthquake...