

How appropriate that on St Patrick's Day, a huge geomagnetic storm should set the Aurora Borealis dancing across the skies from North America to Northern Scandinavia.
Due to the altitude with which solar particles collide with our atmosphere, the Aurora is usually predominantly green which seems to hit exactly the right St Patrick's Day notes. However, because of the sheer ferocity of the geomagnetic storm raging above our head, today's Auroras are likely to be multi-coloured with yellows, reds, pinks and blues as much to the fore as the more "traditional" green.