However, engineers say it is impossible to predict more than about 30 minutes before it actually happens, The Independent reported.Such solar superstorms are estimated to occur once every 100 or 200 years, with the last one hitting the Earth in 1859.
Although none has occurred in the space age, we are far more vulnerable now than a century ago because of the ubiquity of modern electronics.“The general consensus is that a solar superstorm is inevitable, a matter not of ‘if’ but ‘when?’,” says a report into extreme space weather by a group of experts at the Royal Academy of Engineering in London.
There have been a number of “near misses” in the past half century, when an explosive “coronal mass ejection” of energetic matter from the Sun narrowly bypassed the Earth.
A relatively minor solar storm in 1989 knocked out several key electrical transformers in the Canadian national grid, causing major power blackouts.Similar solar storms significantly increased atmospheric radiation levels in 1956, 1972, 1989 and 2003.
Professor Paul Cannon, who chaired the academy’s working group on solar storms, said that the Government should set up a space weather board to oversee measures aimed at minimising the impact.