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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.

New Delhi: Congress leader Rahul Gandhi has written to Karnataka Chief Minister Siddaramaiah, urging him to extend all possible help to the victims of JD(S) leader Prajwal Revanna's alleged sexual abuse.

In a letter to Siddaramaiah, Gandhi condemned the actions of Revanna, an MP from Hassan in Karnataka, and accused him of enjoying immunity with the blessings of Prime Minister Narendra Modi and Union Home Minister Amit Shah.

In a veiled attack on Modi, the Congress leader said he has never come across a senior public representative who has constantly chosen silence in the face of untold violence against women.

"I request you to kindly extend all possible support to the victims," Gandhi said in his letter to the Karnataka chief minister.

"They deserve our compassion and solidarity as they fight their battle for justice. We have a collective duty to ensure that all parties responsible for these heinous crimes are brought to book," he added.

Describing the incidents as "horrific sexual violence" unleashed by the incumbent Member of Parliament, Gandhi alleged that Revanna sexually assaulted and filmed hundreds of women over several years.

"Many who looked up to him as a brother and son were brutalised in the most violent manner and robbed of their dignity. The rape of our mothers and sisters warrants the strictest possible punishment."

"I am deeply shocked to learn that as far back as December 2023, our Home Minister Shri Amit Shah was informed by Shri G Devaraje Gowda about Prajwal Revanna's antecedents, especially his history of sexual violence and the presence of videos filmed by the perpetrator," the former Congress chief said.

He said what is even more shocking is that despite these gruesome allegations being brought to the notice of the seniormost leadership of the ruling Bharatiya Janata Party (BJP) at the Centre, Modi campaigned and canvassed for a "mass rapist".

"Furthermore, the Union government wilfully allowed him to flee India to derail any meaningful investigation. The deeply perverse nature of these crimes and the absolute immunity enjoyed by Prajwal Revanna with the blessings of the Prime Minister and Home Minister deserves the strongest condemnation," Gandhi said.

"In my two decades in public life, I have never come across a senior public representative who has constantly chosen silence in the face of untold violence against women. From our wrestlers in Haryana to our sisters in Manipur, Indian women are bearing the brunt of the Prime Minister's tacit support for such criminals," he alleged.

In this backdrop, Gandhi said the Congress has a moral duty to fight for justice for "our mothers and sisters".

"I understand that the Karnataka government has constituted a Special Investigation Team (SIT) to investigate the grave allegations, and a request has been made to the Prime Minister to cancel Prajwal Revanna's diplomatic passport and get him extradited to India at the earliest," he said.

H D Revanna, the Janata Dal (Secular) MLA from Holenarasipura in Karnataka's Hassan district, is the son of former prime minister and JD(S) patriarch H D Deve Gowda and elder brother of former chief minister H D Kumaraswamy. He is facing allegations of sexually abusing women.

The Israeli regime is forcibly evacuating Palestinians from the eastern part of Rafah in the southern Gaza Strip amid the prospect of its widely-discouraged ground invasion.

“The estimate is around 100,000 people,” an Israeli military spokesman told journalists on Monday when asked how many people were being evacuated.

International organizations, including the United Nations, have repeatedly warned the regime against invading the city, citing its hosting around 1.5 million Palestinian refugees.

UN Secretary-General Antonio Guterres said a ground assault on Rafah would “put the final nail in the coffin” for humanitarian aid operations in the Gaza Strip.

The UN Office for the Coordination of Humanitarian Affairs also said, “Any ground operation would mean more suffering and death,” with an official saying “It could be a slaughter of civilians.”

Multiple aid agencies, including the Norwegian Refugee Council, have likewise warned against a Rafah offensive.

The NRC said such an invasion “would profoundly exacerbate the already catastrophic levels of need and the humanitarian emergency for millions of civilians with nowhere left to go.”

The official alleged Hamas had killed three Israeli forces on Sunday, attacking them from Rafah.

The evacuation order came a sat least 22 people lost their lives in the regime’s airstrikes killed in Rafah earlier on Monday.

Rafah’s evacuation “is part of our plans to dismantle Hamas,” the Israeli spokesman added, referring to the Palestinian resistance movement that has been defending Gaza in the face of the war.

The Palestinians have fled there from the ravages of a war that the regime began waging against Gaza on October 7, following a retaliatory operation by the coastal sliver’s resistance groups.

At least 34,683 Palestinians, mostly women and children, have been killed and 78,018 others injured so far during the brutal military onslaught.

On Friday, Hossam Badran, a member of Hamas’ Political Bureau, said Israeli prime minister Benjamin Netanyahu’s insistence on carrying out a ground invasion of Rafah was a key stumbling block in negotiations aimed at a truce agreement.

The Israeli premier has said the regime would go ahead with invading the city “with or without” a truce.

Hamas has, however, asserted that the regime has failed to defeat the resistance during the war.