Real Magnetic Nordic rainbow bridge.
It starts with "magnetic reconnection", on the sun when the reconnection occurs normally The detached circulating magnetic lines rapidly get get closer together and generate charged particles in an explosion. but in some cases a horizontal field line is is trapped in the center were the lines would meet stopping the detached lines from getting to close to explode making a ring around it, super-charged super-heated electrons will orbit around in a magnetic circle warping a rip in space time.
if one was to be generated on earth it would react with air making a shimmering aurora colored ring.
a reference. http://sprg.ssl.berkeley.edu/~tohban/nuggets/?page=article&article_id=14
now look in the background of the picture in this link
the diagram of magnetic reconnection and that's the symbol of the bridge in Norse mythology.