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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.

Iran has urged Muslim countries to cut all relations with the Israeli regime as means of pressuring Tel Aviv to end its ongoing genocidal war on the Gaza Strip.

Foreign Minister Hossein Amir-Abdollahian made the remarks on Saturday, addressing the 15th Heads of State and Government Summit of the Organization of Islamic Cooperation (OIC) in Gambia’s capital Banjul.

“Beyond doubt, this time period will also pass by, despite all its hardships and adversities for the Palestinian nation,” he said.

“However, the manner and quality of the role that is played by us, Muslim states, in the face of this crisis will go down in history,” the top diplomat added.

“Undoubtedly, severance of diplomatic and economic ties and [imposition of] practical arms and trade embargo [on Israel] serves as an important means of cessation of its genocide in Gaza and atrocities in the West Bank and the Noble al-Quds.”

At least 34,654 people have died in Gaza since October 7, when the Israeli regime began the war in response to al-Aqsa Storm, a retaliatory operation by the coastal sliver’s resistance groups.

Despite the unabated campaign of bloodshed and destruction, the regime has so far fallen short of realizing its goals, including defeating Gaza’s resistance, causing forced displacement of the territory’s entire population to neighboring Egypt, and enabling the release of those who were taken captive during al-Aqsa Storm.

Amir-Abdollahian said Gaza’s developments proved that elimination of the Palestinian resistance “was nothing but an illusion.”

“Because the Israeli regime is not a legitimate government. It is only an occupying apartheid power,” he said, adding, “Passage of time is not going to lend legitimacy to an occupying power.”

The foreign minister asserted that realization of sustainable peace and security in the region was only possible through cessation of the regime’s occupation of Palestine, Syria, and Lebanon, return of the Palestinian refugees to their homeland, and manifestation of Palestinians’ right to self-determination.

US riot police have dismantled an anti-war and pro-Palestinian protest camp at the University of California at Los Angeles, a day after it was attacked by pro-Israel supporters.

At least 200 pro-Palestine protesters were arrested during the pre-dawn raid, led by a phalanx of California Highway Patrol officers carrying shields and batons, early on Thursday.

The protesters tried to block the officers' advance by their sheer numbers, shouting "push them back", while hundreds of pro-Palestinian activists who assembled outside the tent city were heard chanting "Shame on you" at the police.

According to estimates of local television station KABC-TV, 300 to 500 protesters were hunkered down inside the camp, while about 2,000 more had gathered outside the barricades in support.

The raid took place about a day after police watched on as pro-Israel groups violently attacked the encampment. Late Tuesday night, masked counter-demonstrators mounted a surprise assault on the camp, using sticks to beat the peaceful activists.

The assault went on for three hours into early Wednesday morning until police intervened and restored order.

The authorities’ slow response drew wide criticism from political leaders, including a spokesperson for California Governor Gavin Newsom who said "limited and delayed campus law enforcement response" to the unrest is "unacceptable."

The Pro-Palestine demonstrations began at Columbia University in New York City on April 17, and have spread across other campuses in the US in a student movement unlike any other this century.

US police arrested about 2,200 people during pro-Palestinian protests at college campuses across the country in recent weeks, the Associated Press reported.

A tally by the news agency recorded at least 56 incidents of arrests at 43 different US colleges or universities since April 18.

The students are calling for an end to Israel’s genocidal war on Gaza and demanding schools divest from companies that support the Israeli regime.

Israel launched the war on Gaza on October 7 after the Palestinian resistance movement Hamas waged the surprise Operation Al-Aqsa Storm against the occupying entity in response to the Israeli regime's decades-long campaign of bloodletting and devastation against Palestinians.

Tel Aviv has also blocked water, food, and electricity to Gaza, plunging the coastal strip into a humanitarian crisis.

Since the start of the offensive, the Israeli regime has killed at least 34,596 Palestinians and injured 77,816 others.