I thought I had cracked the puzzle with earthquake epicentres with the latest quake in the SED list:

The latest quake on the SED list shows aen epicentre in the middle of two contra rotating air masses (caught in in the flows of an High and a Low.) All the few I have followed until now have occure in a soft spot where the flow was minimal. But along weather fronts.

This too is a weather front but as far from the term Col as it is possible to be.

2015/03/07 at 20:58. 32.34 N. 160.78 E. 5.5 Mb. North Pacific Ocean
Wrong. Back to the drawing board.

I had it down as this (32.34 N. 160.78 W.) and thought I made a breakthrough:
http://earth.nullschool.net/#current...2.23,55.81,447

Here is where the epicentre was some 2 hours ago:
http://earth.nullschool.net/#current...2.23,55.81,447

It does happen from time to time. Preferably when I catch it before postage..:~)

If you came to this too late or don't usually click on links, the epicentre was smack on the mouth of a river like weather front. If you want to see it in all its folly, get weaving.