Best indicator of wind energy

 I am trying to rate the big Arctic spills by total energy, just like earthquakes.  Each level up is a factor of 10 in energy.  But for earthquakes, this is also fault length, and things prevent fault ruptures more than a few thousand km.  So, you will never get above M9 something.

For the Arctic spills we have a fine example of what happens when things peter out to nothing.

This was big just a while and poured over a wide zone by the Bering Str, totally smooth.  Now, it has to wheedle its way past the hills.  To me, this is super-neat.  That means the bottom of the Arctic Vortex has stopped going there, and will soon hit Toronto again.

As for Europe, the prospect of a new super-spill behind what has hit already, makes me want to call the whole thing an A10.  Please note that there are no measurements, because nobody wants them.