From blackouts to transport chaos: Solar superstorms pose a ‘catastrophic’ threat to life on Earth, warns scientist

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Solar ‘super-storms’ pose a ‘catastrophic’ and ‘long-lasting’ threat to life on Earth, a scientist has warned.

These huge storms are caused by violent eruptions on the surface of the sun and are accompanied by coronal mass ejections, or CMEs.

CMEs are the most energetic events in our solar system – involving huge bubbles of plasma and magnetic fields being spewed from the sun’s surface into space.

 

From blackouts to transport chaos Solar superstorms pose a ‘catastrophic’ threat to life on Earth, warns scientist

Solar ‘super-storms’ pose a ‘catastrophic’ and ‘long-lasting’ threat to life on Earth, a scientist has warned. A solar eruption could take out the National Grid, along with many electrical systems across the world

They are often preceded by a solar flare – a massive release of energy from the sun in the form of gamma rays, X-rays, protons and electrons.

A solar superstorm occurs when a CME of sufficient magnitude tears into the Earth’s surrounding magnetic field and rips it apart. 

Such an event would induce huge surges of electrical currents in the ground and in overhead transmission lines, causing widespread power outages and severely damaging critical electrical components.

Ashley Dale, who was a member of an international task force – dubbed Solarmax – set up to identify the risks of a solar storm and how its impact could be minimised, warned of the danger man faces from ‘solar super-storms.’

Spectacular sighting NASA captures solar flare erupting

 

A solar superstorm occurs when a CME of sufficient magnitude tears into the Earth¿s surrounding magnetic field and rips it apart

A solar superstorm occurs when a CME of sufficient magnitude tears into the Earth’s surrounding magnetic field and rips it apart

Mr Dale, carrying out doctoral research in aerospace engineering at Bristol University, said it is only a ‘matter of time’ before an exceptionally violent solar storm is propelled towards Earth.

He says such a storm would wreak havoc with communication systems and power supplies, crippling vital services such as transport, sanitation and medicine.

HOW DO SOLAR FLARES AFFECT EARTH?

Solar flares can damage satellites and have an enormous financial cost.

Astronauts are not in immediate danger because of the relatively low orbit of this manned mission. They do have to be concerned about cumulative exposure during space walks.

The charged particles can also threaten airlines by disturbing the Earth’s magnetic field.

Very large flares can even create currents within electricity grids and knock out energy supplies.

A positive aspect, from an aesthetic point of view, is that the auroras are enhanced.

Geomagnetic storms are more disruptive now than in the past because of our greater dependence on technical systems that can be affected by electric currents.

‘Without power, people would struggle to fuel their cars at petrol stations, get money from cash dispensers or pay online,’ he said.

‘Water and sewage systems would be affected too, meaning that health epidemics in urbanised areas would quickly take a grip, with diseases we thought we had left behind centuries ago soon returning.’

The largest ever solar super-storm on record occurred in 1859 and is known as the Carrington Event, named after the English astronomer Richard Carrington who spotted the preceding solar flare.

This massive CME released about 1022 kJ of energy – the equivalent to 10 billion Hiroshima bombs exploding at the same time – and hurled around a trillion kilos of charged particles towards the Earth at speeds of up to 3000 km/s.

However, its impact on the human population was relatively benign as our electronic infrastructure at the time amounted to no more than about 124,000 miles (200,000 km) of telegraph lines.

Mr Dale makes it clear in the latest issue of Physics World that these types of events are not just a threat, but inevitable.

Nasa scientists have predicted that the Earth is in the path of a Carrington-level event every 150 years on average. 

This means that we are currently five years overdue – and that the likelihood of one occurring in the next decade is as high as 12 per cent.

This image of a huge solar flare (top left) was captured by the Solar Dynamics Observatory (SDO). One of the most dramatic features is the way the entire surface of the sun seems to ripple with the force of the eruption

This image of a huge solar flare (top left) was captured by the Solar Dynamics Observatory (SDO). One of the most dramatic features is the way the entire surface of the sun seems to ripple with the force of the eruption

The 40-strong international team of scientists from Solarmax gathered at the International Space University in France last year to identify the best ways of limiting the potential damage of a solar super-storm.

A sub-group of scientists concluded that advanced space-weather forecasting is the best solution, which could be achieved by sending an array of 16 lunchbox-sized cube satellites into orbit around the Sun.

The network could give around a week’s notice of where, when and with what magnitude solar storms will take place, providing adequate time to switch off vulnerable power lines, re-orientate satellites, ground planes and begin national recovery programmes.

Mr Dale’s own solution is to design spacecraft and satellites so that the sensitive, on-board instruments are better protected again sudden increases in radiation from solar storms.

He suggests redistributing the existing internal architecture of a craft so that sensitive payloads are surrounded by non-sensitive bulk material such as polyethylene, aluminium and water.

Mr Dale added: ‘As a species, we have never been more vulnerable to the volatile mood of our nearest star, but it is well within our ability, skill and expertise as humans to protect ourselves.’

#Daily Mail

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