I suspect it hasn't been done because there was no obvious value to such data, and the effort of figuring out the precise position and magnetic orientation of trillions of iron particles would be pretty high...
Lloyd’s of London is a large insurer and is very interested in the potential liability that they are exposed to from the various insurance policies that they’ve underwritten.
In 2013, they published a report[0] considering the effects of solar storm risk to the North American electric grid.
