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Washington, May 11: The most powerful solar storm in more than two decades struck Earth on Friday, triggering spectacular celestial light shows from Tasmania to Britain -- and threatening possible disruptions to satellites and power grids as it persists into the weekend.

The first of several coronal mass ejections (CMEs) -- expulsions of plasma and magnetic fields from the Sun -- came just after 1600 GMT, according to the National Oceanic and Atmospheric Administration (NOAA)'s Space Weather Prediction Center.

It was later upgraded to an "extreme" geomagnetic storm -- the first since the "Halloween Storms" of October 2003 caused blackouts in Sweden and damaged power infrastructure in South Africa. More CMEs are expected to pummel the planet in the coming days.

Social media lit up with people posting pictures of auroras from northern Europe and Australasia.

"We've just woken the kids to go watch the Northern Lights in the back garden! Clearly visible with the naked eye," Iain Mansfield in Hertford, England, told AFP.

That sense of wonder was shared in Australia's island state of Tasmania.

"Absolutely biblical skies in Tasmania at 4 am this morning. I'm leaving today and knew I could not pass up this opportunity," photographer Sean O' Riordan posted on social media platform X alongside a photo.

Authorities notified satellite operators, airlines, and the power grid to take precautionary steps for potential disruptions caused by changes to Earth's magnetic field.

Elon Musk, whose Starlink satellite internet operator has some 5,000 satellites in low Earth orbit, described the solar storm as the "biggest in a long time."

"Starlink satellites are under a lot of pressure, but holding up so far," Musk posted on his X platform.

Unlike solar flares, which travel at the speed of light and reach Earth in around eight minutes, CMEs travel at a more sedate pace, with officials putting the current average at 800 kilometers (500 miles) per second.

The CMEs emanated from a massive sunspot cluster that is 17 times wider than our planet. The Sun is approaching the peak of an 11-year cycle that brings heightened activity.

'Go outside tonight and look'

Mathew Owens, a professor of space physics at the University of Reading, told AFP that how far the effects would be felt over the planet's northern and southern latitudes would depend on the storm's final strength.

"Go outside tonight and look would be my advice because if you see the aurora, it's quite a spectacular thing," he said. People with eclipse glasses can also look for the sunspot cluster during the day.

In the United States, this could include places such as Northern California and Alabama, officials said.

NOAA's Brent Gordon encouraged the public to try to capture the night sky with phone cameras even if they couldn't see auroras with their naked eyes.

"Just go out your back door and take a picture with the newer cell phones and you'd be amazed at what you see in that picture versus what you see with your eyes."

Spacecraft and pigeons

Fluctuating magnetic fields associated with geomagnetic storms induce currents in long wires, including power lines, which can potentially lead to blackouts. Long pipelines can also become electrified, leading to engineering problems.

Spacecraft are also at risk from high doses of radiation, although the atmosphere prevents this from reaching Earth.

NASA has a dedicated team looking into astronaut safety and can ask astronauts on the International Space Station to move to places within the outpost that are better shielded.

Following one particularly strong flare peak, the US Space Weather Prediction Center said users of high-frequency radio signals "may experience temporary degradation or complete loss of signal on much of the sunlit side of Earth."

Even pigeons and other species that have internal biological compasses could also be affected. Pigeon handlers have noted a reduction in birds coming home during geomagnetic storms, according to NASA's Jet Propulsion Laboratory.

Officials said people should have the normal backup plans in place for power outages, such as having flashlights, batteries, and radios at hand.

The most powerful geomagnetic storm in recorded history, known as the Carrington Event after British astronomer Richard Carrington, occurred in September 1859.

Comedian Shyam Rangeela on Tuesday that he was barred from filing his nomination papers for the 2024 Lok Sabha Elections. He intended to challenge Prime Minister Narendra Modi from the Varanasi seat by contesting as an Independent candidate.

Despite attempts to file his papers since May 10, Rangeela alleged he was denied entry to the district magistrate's office on the day Prime Minister Modi filed his nomination. He also said that he is not taking any team from Sriganganagar to contest the Lok Sabha elections in Varanasi. 

Shyam Rangeela further claimed that he has received several phone calls from Varanasi and people are willing to join him. "Winning or losing is a different matter, but I will contest the elections against the Prime Minister at any cost. I am not contesting elections to become famous, I am already very famous among the public."

The Congress party also waded into the controversy. Congress leader Surendra Rajput told news agency PTI that everyone is free to file a nomination including Prime Minister Modi. Rajput claimed that Rangeela was not getting nomination papers from the administration. 

"Everyone is free to file a nomination including PM Modi. However, other people are not allowed to file their nominations from the constituency. A YouTuber named (Shyam) Rangeela, who wished to file a nomination from Varanasi, isn’t getting nomination papers from the administration. Why PM Modi is afraid of people? Let them contest against you," he said. 

PM Modi, contesting for a third term, previously won the Varanasi seat by 4.8 lakh votes in 2019 and by 3.72 lakh votes in 2014. So far, 14 individuals, including mainstream political party candidates and independents, have filed their nominations for the Varanasi constituency.

Congress candidate Ajai Rai and Bahujan Samajwadi Party's Athar Ali Lari are among them. Rangeela, a YouTuber and mimic from Rajasthan’s Hanumangarh, rose to fame in 2017 with his act impersonating PM Modi. He has been critical of the Prime Minister and his policies, as evident in his videos.
 

Canadian Police said they have arrested three Indians they suspect were part of the alleged hit squad that had killed Hardeep Singh Nijjar, a Sikh separatist leader involved with the Khalistan movement, which calls for an independent Sikh state.

Nijjar's killing had become the epicentre of a diplomatic row between India and Canada last year after Prime Minister Justin Trudeau alleged the role of "Indian agents" in the murder. India had rejected the charge as "absurd" and "motivated".

The three arrested Indians - Karan Brar, 22, Kamalpreet Singh, 22, Karanpreet Singh, 28 - were living as non-permanent residents in Alberta for three to five years, said Superintendent Mandeep Mooker, who leads the Integrated Homicide Investigation Team. The police have also released their photos.

They have been charged with first-degree murder and conspiracy to commit murder, showed court documents.

Police said that none of the suspects were known to them earlier and they were investigating their possible ties to the Indian government.

The murder remains "very much under active investigation," Royal Canadian Mounted Police (RCMP) Assistant Commissioner David Teboul told a press conference on Friday.

"There are separate and distinct investigations ongoing into these matters, certainly not limited to the involvement of the people arrested today, and these efforts include investigating connections to the government of India," CTV News quoted him as saying.

Nijjar, a Canadian citizen who was wanted in India on various terror charges, was shot dead outside a gurdwara in Surrey on June 18, 2023. Trudeau's charge against India sparked a massive row later that year with both countries expelling diplomats of the other country.

A fresh row erupted earlier this week after separatist slogans on 'Khalistan' were raised at an event addressed by Trudeau, prompting New Delhi to summon their Deputy High Commissioner and lodge a strong protest.

On the sidelines of the event, Trudeau told reporters that Nijjar's killing had created a "problem" that he could not have ignored.

India rejected his comment and said it once again showed Canada provides political space given to separatism, extremism, and violence. "This not only impacts India-Canada relations but also encourages a climate of violence and criminality in Canada to the detriment of its own citizens," foreign ministry spokesperson Randhir Jaiswal said.