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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.

The stage is all set for the third phase of voting for the Lok Sabha election, which will take place on Tuesday, May 7. The polling will take place across 94 Lok Sabha constituencies covering ten states and two union territories.

Jammu and Kashmir's Anantnag-Rajouri Lok Sabha seats were also to vote in the third phase of polling. However, due to several connectivity issues, the Election Commission of India rescheduled it to May 25.

The voting in the third phase of the Lok Sabha election will begin at 7 am on Tuesday and conclude at 5 pm. The results will be declared on June 4.

Lok Sabha election Phase 3: List of states and constituencies:

Over 1,300 candidates, including 120 women, are in the fray in the third phase of the Lok Sabha election. Some of the key candidates include bigwigs such as union ministers Amit Shah, Jyotiraditya Scindia, Mansukh Mandaviya, Parshottam Rupala, Pralhad Joshi, and SP Singh Baghel. Former Madhya Pradesh chief ministers Shivraj Singh Chouhan and Digvijaya Singh are also contesting the election in Madhya Pradesh. At the same time, the fate of former Karnataka chief minister Basavaraj Bommai will also be decided in the third phase. Meanwhile, several members of Mulayam Singh Yadav's family are also contesting in this phase in Uttar Pradesh.

List of key candidates and their constituencies

Amit Shah (BJP) - Gandhi Nagar, Gujarat

Digvijaya Singh (Congress) - Rajgarh, Madhya Pradesh

Shivraj Singh Chouhan (BJP) - Vidisha, Madhya Pradesh

Dimple Yadav (SP) - Mainpuri, Uttar Pradesh

Supriya Sule (NCP) - Baramati, Maharashtra

Purshottam Rupala (BJP) - Rajkot, Gujarat

Jyotiraditya Scindia (BJP) - Guna, Madhya Pradesh

Pralhad Joshi (BJP) - Dharwad, Karnataka

KS Eshwarappa (BJP) - Shimoga, Karnataka

Praniti Shinde (Congress) - Solapur, Maharashtra

Hasmukbhai Patel (BJP) - Ahmedabad East, Gujarat

Pallavi Dempo (BJP) - South Goa, Goa

Adhir Ranjan Chowdhury (Congress) - Berhampore, West Bengal

The Lok Sabha elections are being held in seven phases - with the first phases concluded on April 19 and April 26. The third phase will be held on May 7; the fourth phase will be held on May 13; the fifth phase will be on May 20; the sixth phase will be on May 25; and the seventh phase on June 1.

Mangaluru: The passenger vessel service between Lakshadweep and Mangaluru has recommenced operations with the arrival of Parali, a high-speed craft, at the Old Mangaluru Port on Thursday, May 2 

With 160 passengers on board, along with a pilot, a ship engineer, an assistant, and eight labourers, the arrival of the vessel brings hopes of reinstating this vital transportation link.

The passengers were welcomed by Congress brass. The vessels that used to arrive before the Covid-19 pandemic took 13 hours to reach Mangaluru from Lakshadweep. However, the introduction of the high-speed craft, Parali, has reduced the travel time to approximately seven hours, said Abubakar Ashraf Bengre.

Bengre is part of a team that has been instrumental in liaising with the authorities of both Lakshadweep and Karnataka to facilitate the revival of this service. He told reporters that the service would bring better economic activity to Mangaluru. 

Over recent months, discussions have been held with Hamdullah Sayeed, president, Lakshadweep Congress Committee, as well as Karnataka Speaker UT Khader and district minister Dinesh Gundu Rao, to garner support for the reintroduction of the service.

The passengers who arrived mostly sought medical treatment, went shopping or met relatives here. They said that they traveled for Rs 450. Former MLA J R Lobo said that they will urge the government to ensure regular vessel services continue.

The passenger service was discontinued due to a lack of demand, it is learnt. In the year 2018-19, 4,955 passengers embarked and 7,422 disembarked from the Old Mangaluru Port. Subsequently, the figures declined to 3,779 (embarked) and 2,294 (disembarked) in 2019-20. The numbers further plummeted to 561 (embarked) and 19 (disembarked) in 2020-21, leading to the suspension of the service.

At present, the administration of the Union Territory of Lakshadweep has released a schedule for high-speed craft movement from April 29 to May 5.