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Students in Paris blocked access to a campus building at a French university on Friday, as pro-Palestine demonstrations reach Europe.

The students occupied the central campus building of the Paris Institute of Political Studies, known as Sciences Po, and dozens of others blocked its entrance, echoing protest action at American universities.

Students inspired by Gaza solidarity encampments at campuses in the United States blocked access to a campus building at the prestigious French university on Friday.

They blocked the entrance with trash cans, wooden platforms and other items.

The occupation of the Paris university campus came after police broke up a separate protest at the university’s amphitheater outside one of its Paris campuses.

Scores of student protesters gathered at the building’s windows, chanting slogans and holding placards reading “We are all Palestinians,” in defiance of administrators who students say called the police on their peers two days earlier.

Pro-Palestinian student protesters had occupied the amphitheater outside one of the university’s Paris campuses on Wednesday evening.

The US-style student protests, which began over the months-long Israeli regime’s genocidal war against Palestinians in the besieged Gaza Strip, kicked off in the United States and have now spread to European capitals as well as Australia.

In the German capital Berlin, several people were arrested as police violently cleared a camp of Gaza war protesters at the German parliament.

Pro-Palestinian activists are demanding a permanent ceasefire, an end to the Israeli atrocities, and an arms embargo of the Tel Aviv regime.

The Israeli regime launched the war on Gaza on October 7 last year. The genocidal war has killed more than 34,356 Palestinians, most of them women and children.

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.

At least 900 protesters have been arrested since the launch of pro-Palestinian demonstrations on university campuses across the US, where students are raging against the Israeli regime’s US-backed genocidal war on Gaza.

The Washington Post reported the tally on Sunday, the 10th straight day of the protests that began after Columbia University set up an encampment to demand cessation of the war and press the school to divest from Israeli financial interests.

The crackdown then started when university authorities called in the police, a move that sparked more than 100 arrests on the university’s Manhattan campus.

Two other highlights in the crackdown saw police forces rounding up roughly the same number of people at New York University and Emerson College in Boston.

Protests have also erupted across numerous other seats of learning, including Brown University in Providence, Rhode Island, the University of Michigan in Ann Arbor, Massachusetts Institute of Technology in Cambridge, and California State Polytechnic in Humboldt.

The ensuing countrywide counter-campaign of suppression has seen law enforcement resorting to riot control methods against the protesters.

The methods have featured “the same tools and tactics” that were deployed to confront the thousands-strong protests that sparked across the country after a Minneapolis police officer killed George Floyd four years ago, the daily reported.

“At Emory University last week, Atlanta police said officers used ‘chemical irritants’ to clear an encampment, and a Georgia State Patrol officer was captured on video using a stun gun to subdue a man on the ground,” it said.

Academics have, meanwhile, been banding together throughout the US under the banner of Faculty and Staff for Justice in Palestine (FSJP).

Earlier in April, the FSJP’s Georgia chapter called on Morehouse College in Atlanta, which invited Joe Biden as its 2024 commencement speaker, to rescind its invitation as a means of objecting to the president’s role in enabling the Israeli genocide.

At Biden’s behest, the United States has been providing the Israeli war with unreserved military and intelligence support.

The US has also vetoed several United Nations Security Council resolutions calling for an immediate ceasefire in the brutal military onslaught that has so far claimed the lives of at least 34,454 Gazans, mostly women and children.