Radiation storm are not damaging to humans, on soil at least, according to the US room agency. They can, however, have an effect on satellite operation and small wave radio.

Solar radiation from a huge sun storm - the main in nearly a decade - collide with the Earth's atmosphere on Tuesday, prompt an airline to redirect flights and sky watchers to seek out stunning light displays.US carrier Delta Air Lines said it had attuned flight routes for transpolar journeys between Asia and the United States to keep away from problems cause by the radiation storm.

NASA long-established the coronal mass ejection (CME) began collide with Earth's attractive field around 10:00 AM (1500 GMT) on Tuesday, addition that the storm was now being careful the largest since October 2003.Radiation storm are not harmful to humans, on Earth at smallest amount, according to the US space agency. They can, though, affect satellite operation and short wave radio.

The storm's radiation, likely to carry on bombarding Earth's atmosphere from side to side Wednesday, and its possible disturbance to satellite communications in the Polar Regions encouraged the flight rerouting, airline officials said. Atlanta-based Delta, the world's next largest airline, said "a handful" of routes had their journey attuned "based on potential impact" of the solar storm on infrastructure equipment, spokesman Anthony Black told AFP.

Routes from Hong Kong, Shanghai and Seoul took a more southerly route after the solar flare erupted on Sunday. The airline said it would carry on monitoring solar activity before go back flights to their normal routes.

Due to the strange intensity of the photons raining on Earth, the spectacular aurora borealis - the stunning "Northern Lights" show - which is often seen closer to the Arctic pole at this time of year, has been seen as far south as Scotland and northern England, and at lower latitude in the United States.

The event started late Sunday with a moderate-sized solar flare that erupt right near the centre of the Sun, said Doug Biesecker, a physicist with the National Oceanic and Atmospheric Administration Space Weather Prediction Center."The flare itself was nothing spectacular, but it sent off a very fast coronal mass ejection itinerant four million miles per hour (6.4 million kilometers per hour)," he told AFP.Space weather watchers said the best aurora sightings are usually around midnight local time. Rob Stammes, who run the Lofoten Polar Light Centre in Lofoten, Norway said the CME's arrival Tuesday had shaped a surge in ground current inside his laboratory.