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Lightning in the ‘cataclysmic’ Tonga volcano eruption shattered ‘all records’ | CNN

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Lightning in the ‘cataclysmic’ Tonga volcano eruption shattered ‘all records’ | CNN



CNN
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When the Hunga Tonga-Hunga Ha’apai volcano erupted in January 2022, it despatched shockwaves world wide. Not solely did it set off widespread tsunami waves, but it surely additionally belched an unlimited quantity of climate-warming water vapor into the Earth’s stratosphere.

Now researchers in a brand new report have unveiled one thing else: the eruption set off greater than 25,500 lightning occasions in simply 5 minutes. Over the course of simply six hours, the volcano triggered almost 400,000 lightning occasions. Half of all of the lightning on the earth was concentrated round this volcano on the eruption’s peak.

The “cataclysmic eruption” shattered “all information,” in response to the report from Vaisala, an environmental monitoring firm that tracks lightning world wide.

“It’s probably the most excessive focus of lightning that we’ve ever detected,” Chris Vagasky, meteorologist and lightning skilled at Vaisala, informed CNN. “We’ve been detecting lightning for 40 years now, and that is actually an excessive occasion.”

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The annual report by Vaisala discovered that 2022 was a yr of extremes for lightning. Lightning elevated within the US in 2022, with greater than 198 million lightning strokes — 4 million greater than what was noticed in 2021, and 28 million greater than 2020.

“We’re persevering with an upward pattern in lightning,” Vagasky stated.

The World-Broad Lightning Location Community, one other lightning monitoring community led by the College of Washington, which isn’t concerned with the report, stated Vaisala’s findings about world lightning in addition to the Hunga volcano are in line with their very own observations.

“We are able to do that as a result of the stronger eruptions generate lightning, and lightning sends detectable radio alerts world wide,” Robert Holzworth, the director of the community, informed CNN. “The Hunga eruption was completely spectacular in its lightning exercise.”

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Researchers have used lightning as a key indicator of the local weather disaster, because the phenomenon sometimes alerts warming temperatures. Lightning happens in energetic storms related to an unstable environment, requiring comparatively heat and moist air, which is why they primarily happen in tropical latitudes and elsewhere throughout the summer time months.

However in 2022, Vaisala’s Nationwide Lightning Detection Community discovered greater than 1,100 lightning strokes in Buffalo, New York, throughout a devastating lake-effect snowstorm that dumped greater than 30 inches of snow within the metropolis, however piled historic totals in extra of 6 toes within the surrounding suburbs alongside Lake Erie. Lake-effect snow happens when chilly air blows over heat lake water, on this case from the Nice Lakes. The massive distinction in temperature could cause excessive instability within the environment and result in thunderstorm-like lightning even in a snow storm.

More than 1,100 lightning strokes were detected in Buffalo, New York, during a devastating lake-effect snowstorm that dumped more than 30 inches of snow in the city, but piled historic totals in excess of 6 feet in the surrounding suburbs along Lake Erie.

The report famous that many of those lightning occasions occurred close to wind generators south of Buffalo, which Vagasky stated was vital. He defined that the ice crystal-filled clouds had been decrease to the bottom than normal, scraping simply above the blades of the generators.

“That may trigger what is called self-initiated upward lightning,” Vagasky stated. “So the lightning happens as a result of you might have charged on the tip of this wind turbine blade that’s actually near the bottom of the cloud, and it’s very easy to get a connection of the electrical cost.”

That is an space of ongoing analysis, he stated, because the nation turns to extra clear vitality options.

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“We’re seeing larger and greater wind generators, and positively as we’re placing in increasingly more wind vitality and renewable vitality, lightning goes to play a job in that,” he stated.

The report comes after an uncommon yr in 2021, once they discovered lightning strokes elevated considerably within the sometimes frozen Arctic area, which scientists say is a transparent signal of how the local weather disaster is altering world climate.

“Lightning in polar areas wasn’t talked about [in this year’s Vaisala report], however our world lightning community reveals a pattern for far more lightning within the northern polar areas,” Michael McCarthy, analysis affiliate professor and affiliate director of the World Broad Lightning Location Community, informed CNN. “That pattern carefully tracks the noticed common temperature modifications over the northern hemisphere.

“This shut monitoring suggests, however doesn’t show, a local weather change impact,” McCarthy added.

Vagasky stated lightning in colder areas will solely amplify because the planet warms, noting that meteorologists and climatologists have been amassing extra information to not solely make the local weather connections clear but in addition hold folks secure.

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“That’s why they’ve named lightning as an important local weather variable,” he stated, “as a result of it’s vital to know the place it’s occurring, how a lot is going on, and so you possibly can see how thunderstorms are trending on account of altering climates.”

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Israel tells civilians to leave Rafah as it warns of imminent ‘operation’

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Israel tells civilians to leave Rafah as it warns of imminent ‘operation’

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The Israeli military has told tens of thousands of Palestinians to leave the southern Gazan city of Rafah as Israel’s defence minister warned of an imminent military “operation” as talks to free Israeli hostages appeared to have stalled.

At least 100,000 civilians in eastern Rafah, along the border with Israel, should move to what Israel calls a humanitarian zone on the Mediterranean, an Israel Defence Force spokesperson told reporters, in “a limited scope” operation as part of a “gradual plan”.

Yoav Gallant, the Israeli defence minister, told troops in Gaza on Sunday that there were “worrying signs” that negotiations over a ceasefire and a hostage swap with militant group Hamas were flailing.

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“The implication of this is an operation in Rafah and all of the Gaza Strip in the very near future,” he said. “We are a moment before action.”

Israel had previously suspended its plans to invade Rafah to allow for indirect negotiations with Hamas over the release of hostages to proceed, Gallant told the troops. The failure of those talks would put those plans back into play, he said.

The evacuation order came amid conflicting reports on the progress of negotiations that could see as many as 33 Israeli hostages freed by Hamas during a six-week pause in hostilities that would have delayed any Israeli operation in Rafah.

Hamas had proposed that the six-week pause be part of a broader deal in which the remaining hostages, many of them soldiers abducted during the October 7 attacks, would be freed in exchange for a more lasting ceasefire.

Israel would have simultaneously released hundreds of Palestinian prisoners, including those convicted of violence against Israeli civilians.

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But a senior Israeli official said over the weekend that the IDF would “enter Rafah and destroy the remaining Hamas battalions there — whether or not there will be a temporary pause for the release of our hostages”.

A Hamas spokesperson told the Al-Aqsa TV channel that the militant group continued to insist on a “permanent ceasefire” before it would agree to free any hostages, a stumbling block that has derailed prior negotiations.

CIA director Bill Burns is expected to visit Israel after talks in recent days in Cairo and Doha with mediators on the details of the proposal, which is being brokered by the US, Egypt and Qatar.

The proposal, at present being studied by Hamas, leaves open the possibility of continued negotiations during an initial limited ceasefire. This could see more of the estimated 132 hostages — including kidnapped soldiers — freed in exchange for a “sustainable calm”.

The evacuation order came after four Israeli soldiers were killed on Sunday in a mortar attack on the Israeli side of the area being evacuated, near the Kerem Shalom border crossing that is crucial for humanitarian aid deliveries into Gaza.

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The IDF spokesperson declined to say if the order was prompted by the attack. The attack “was a reminder of Hamas’s presence”, he said.

Israel’s western allies have repeatedly warned it not to invade Rafah without a detailed plan to protect the more than 1mn Palestinian civilians who have sought shelter in the southern edge of the besieged enclave.

Humanitarian conditions in Rafah remain dire, with food and water shortages that have been exacerbated by the influx of displaced Palestinians from the devastated north of the enclave. UNRWA, the UN relief agency for Palestinians, said it would continue working in Rafah despite the evacuation order, which Israel started communicating with flyers dropped from planes, text messages and phone calls.

The Mawasi humanitarian zone where Israel has told civilians to move is about the size of Heathrow airport, with tent cities set up by international aid organisations and limited field hospitals. The IDF said it would expand the “humanitarian” area.

Egypt has repeatedly said that it opposes any Israeli military operation in Rafah, especially along the so-called Philadelphi Corridor, which runs alongside its border with the Gaza Strip. A map of the evacuation order appears to also include the Rafah border crossing, a major conduit for humanitarian aid.

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Gallant spoke late on Sunday with US defence secretary Lloyd Austin, who repeated Washington’s concerns that any Israeli military operation in Rafah must include a “credible” plan for protecting civilians.

The IDF spokesperson declined to comment on whether Israel’s current plans had been submitted to or approved by the US.

Prime Minister Benjamin Netanyahu’s far-right coalition allies have threatened to collapse his government if he accepts an end to the war in Gaza without dismantling the remaining Hamas battalions that Israel says are now in Rafah.

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UCLA to resume in-person classes after Gaza protest crackdown

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UCLA to resume in-person classes after Gaza protest crackdown

In-person classes will resume Monday at the University of California, Los Angeles, college officials said, after they were moved online following clashes on campus between pro-Palestinian protesters and police.

Demonstrations against Israel’s war on Hamas in Gaza have rocked US campuses across the country for weeks, prompting crackdowns, mass arrests, and a White House directive to restore order.

UCLA said Friday it had moved classes online after a large police contingent forcibly cleared a sprawling encampment. Clashes have also broken out between the protesters and pro-Israel counter-demonstrators.

“The campus will return to regular operations (on Monday)… and plans to remain this way through the rest of the week,” read a statement posted Sunday on the university’s website.

“A law enforcement presence continues to be stationed around campus to help promote safety,” the post added.

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UCLA Chancellor Gene Block said “urgent changes” were needed in the campus’ security operations, adding that a new office would lead the effort.

“It is clear that UCLA needs a unit and leader whose sole responsibility is campus safety to guide us through tense times,” he said in a statement on Sunday.

Rick Braziel, the former head of the Sacramento Police Department, was named to lead the office.

More than 2,000 arrests have been made in the past two weeks across the United States, some during violent confrontations with police, giving rise to accusations of use of excessive force.

President Joe Biden, who has faced pressure from all political sides over the conflict in Gaza, has said that “order must prevail” on US campuses.

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The Gaza war started when Hamas militants staged an unprecedented attack on Israel on October 7 that resulted in the deaths of more than 1,170 people, mostly civilians, according to an AFP tally of Israeli official figures.

Israel’s retaliatory offensive has killed at least 34,683 people in Gaza, mostly women and children, according to the Hamas-run territory’s health ministry.

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Bank Indonesia ‘ready for the worst’ in face of hawkish Fed and currency volatility

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Bank Indonesia ‘ready for the worst’ in face of hawkish Fed and currency volatility

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Indonesia’s central bank is “ready for the worst” and will provide more support for the rupiah if needed, the head of its monetary management department has said.

Bank Indonesia was prepared to intervene in the currency market — as it did last month when the rupiah hit multiyear lows — but would not rely solely on intervention, Edi Susianto, the monetary department’s executive director, told the Financial Times.

Susianto’s comments come as Asian economies brace for more currency volatility following the US Federal Reserve’s signal this month that it will hold interest rates higher for longer.

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Bank Indonesia raised rates unexpectedly late last month and warned of worsening global risks, saying the rate increase was a pre-emptive move to ensure inflation remained within its target.

Indonesia was facing an “unusually” challenging environment from global and domestic factors, Susianto said in an interview.

“We believe that we are ready for the worst situation” of a more hawkish Fed and heightened geopolitical tensions in the Middle East, he said.

Countries around the world are trying to protect their currencies from a strengthening dollar amid growing expectations the Fed will delay cutting interest rates while inflation stays stubbornly above its 2 per cent target.

Bank Indonesia in April stepped into the spot, non-deliverable forwards and bond markets in a “triple intervention” to support the rupiah, Susianto said. The government also asked state-owned enterprises to limit their US dollar purchases.

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Japan and Vietnam have also intervened to support their currencies, while the central banks of Malaysia and South Korea have said they are prepared to do so.

Adding to the wider pressure from a stronger dollar, Indonesia was also experiencing a cycle of dividend repatriation, Susianto said.

He said the repatriation by foreign companies, which has further boosted demand for the dollar, was expected to last until the end of May, after which the rupiah would become “more manageable”.

Since last month’s rate rise, Indonesia had noted net foreign inflows into government bonds and central bank bills, Susianto said.

Separately, central bank governor Perry Warjiyo told a news conference on Friday that it would auction rupiah securities twice a week — instead of once — from this week to attract more inflows.

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Susianto said the bank was encouraging companies to use hedging instruments and pursuing efforts to deepen the market so there would be less need for central bank intervention.

Any future monetary policy action would be “data dependent”, said Susianto, declining to comment on whether the bank was prepared to raise rates further.

Before last month’s rate uplift, economists had widely expected Bank Indonesia to begin cutting rates from later this year, though some now believe the easing may not happen.

Brian Lee, an economist with Maybank Investment Banking Group, said he did not rule out another rate increase, even though the rupiah had strengthened since the surprise increase last month.

“Our base case is for the BI to maintain its policy rate at 6.25 per cent this year to safeguard rupiah stability. It’s unlikely that BI will be able to cut interest rates, given that the central bank expects the Fed to cut only in December,” said Lee.

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“A resumption of rupiah’s depreciation, at the pace seen during the lead-up to April’s meeting, may trigger another BI rate hike.”

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