Solar storm could cause widespread digital disruption says new research

A severe solar storm has the potential to cause significant internet outages which could last for several months, according to a new study.

The study, presented at the annual conference of the ACM Special Interest Group on Data Communication, pointed out that a severe solar storm is 1 in a 100 year event.

However, it said, such a storm could catastrophically impact various human technologies on Earth, and plunge the world into what it terms an “internet apocalypse”.

The Earth’s magnetic field protects its inhabitants from solar winds, consisting of charged particles streaming from the Sun, by deflecting the electric wind towards the planet’s poles and creating scenic auroras.

However, once in about 80-100 years, as a result of the Sun’s natural life cycle, these winds escalate into solar superstorms that could cause catastrophic internet outages covering the entire Earth and lasting several months, says

In the research, Sangeetha Abdu Jyothi from the University of California, Irvine and VMware Research, assessed the robustness of the current internet infrastructure against such an extreme space weather event

The research suggested that long-distance optical fibre lines and submarine cables which are a vital part of the global internet infrastructure are vulnerable to the currents produced on the Earth’s crust by solar superstorms, also known as Coronal Mass Ejections (CME).

“A CME involves the emis­sion of electrically charged matter and accompany­ing magnetic field into space. When it hits the earth, it interacts with the earth’s magnetic field and produces Geomagnetically Induced Currents (GIC) on the crust,” Dr Jyothi said.

The current from these solar storms can enter and damage long conductors such as power lines, the study notes.

“In today’s long-haul Internet cables, the optical fiber is immune to GIC. But these cables also have electrically powered repeaters at ~100 km intervals that are susceptible to damages,” Jyothi added.

While the probability of such events happening varies from 1.6 per cent to 12 per cent probability per decade, Jyothi said the chances increase during the Sun’s maximum activity period in its waxing and waning cycle.

However, Jyothi added, the current digital age and modern technological advances have coincided with a period of weak solar activity.

Yet this also means that the current Internet infrastructure has not been stress-tested by strong solar events.

Citing an example of how disastrous a CME could be for communications systems, Jyothi said the last severe solar storms happened in 1859 and 1921.

Studies have documented the significant damages caused by these solar storms to the communication network of the time – the telegraph network.

The current solar cycle, the study says, has the potential to be one of the strongest on record.

Compared to the previous cycle ending in 2019, which had a peak sunspot number of 116, the number of sunspots at the peak of the current cycle, Jyothi said, is “very high,” between 210 and 260. As the study says:

“Since CMEs often originate in magnetically active regions near sunspots, a larger number of sunspots will increase the probability of a powerful CME. If this estimate proves accurate, it will also significantly increase the probability of a large-scale event in this decade.”

However, the study noted that the actual strength of this cycle would be evident only later in the decade as the solar cycle progresses.

The research also pointed out that the impact of solar superstorms would not be uniform across the globe.

It says the internet infrastructure in higher latitudes, above the equator, face a higher risk, and the US has a high risk of being disconnected from Europe, while Asia is more likely to retain connectivity.

The study underscores the need to consider the risk from solar storms while designing and deploying Internet infrastructure and applications, and calls for better resilience analysis on the global network.

To read the full paper click here.

The Earth’s magnetic field protects its inhabitants from solar winds, consisting of charged particles streaming from the Sun, by deflecting the electric wind towards the planet’s poles and creating scenic auroras.

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