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Mystery tremors were from massive nine-day tsunami

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Scientists were able to pin down the location of the tsunami to a remote fjord in East Greenland

A massive landslide in a Greenland fjord triggered a wave that “shook the Earth” for nine days.

The seismic signal last September was picked up by sensors all over the world, leading scientists to investigate where it had come from.

The landslide – a mountainside of rock that collapsed and carried glacial ice with it – triggered a 200m wave.

That wave was then “trapped” in the narrow fjord – moving back and forth for nine days, generating the vibrations.

 

Landslides like this, scientists say, are happening more frequently with climate change – as the glaciers that support Greenland’s mountains melt.

The results of the investigation into this event, which are published in the journal Science  are the result of a detective mission involving an international team of scientists and the Danish Navy.

“When colleagues first spotted this signal last year, it looked nothing like an earthquake. We called it an ‘unidentified seismic object’,” recalled Dr Stephen Hicks from UCL, one of the scientists involved.

“It kept appearing – every 90 seconds for nine days.”

A group of curious scientists started to discuss the baffling signal on an online chat platform.

“At the same time, colleagues from Denmark, who do a lot of fieldwork in Greenland, received reports of a tsunami that happened in a remote fjord,” explained Dr Hicks. “So then we joined forces.”

The team used the seismic data to pin down the location of the signal’s source to Dickson Fjord in East Greenland. They then gathered other clues, including satellite imagery and photographs of the fjord that were taken by the Danish Navy just before the signal appeared.

A satellite image showed a cloud of dust in a gully in the fjord. Comparing photographs before and after the event revealed that a mountain had collapsed and swept part of a glacier into the water.

The researchers eventually worked out that 25 million cubic metres of rock – a volume equivalent of 25 Empire State Buildings – slammed into the water, causing a 200m-high “mega-tsunami”.

In the “after” photographs of the location, a mark is visible on the glacier – left by the sediment that the giant wave hurled upwards.

Tsunamis, usually caused by underground earthquakes, dissipate within hours in the open ocean. But this wave was trapped.

“This landslide happened about 200km inland from the open ocean,” Dr Hicks explained. “And these fjord systems are really complex, so the wave couldn’t dissipate its energy.”

The team created a mould that showed how, instead of dissipating , it sloshed back and forth  for nine days.

“We’ve never seen such a large scale movement of water over such a long period,” said Dr Hicks.

Scientists say the landslide was caused by rising temperatures in Greenland, which have melted the glacier at the base of the mountain.

“That glacier was supporting this mountain, and it got so thin that it just stopped holding it up,” said Dr Hicks. “It shows how climate change is now impacting these areas.”

While this event was in a a remote area, these fjords are visited by some Arctic cruise ships. Fortunately none were in the area where this landslide occurred. But the lead researcher, Dr Kristian Svennevig from the National Geological Surveys for Denmark and Greenland (GEUS), said this was an increasingly common phenomenon in the Arctic.

“We are witnessing a rise in giant, tsunami-causing landslides, particularly in Greenland,” he told BBC News.

“While the Dickson Fjord event alone doesn’t confirm this trend, its unprecedented scale underscores the need to carry out more research.”

The event at Dickson Fjord, Dr Hicks added, “is the perhaps first time a climate change event has impacted the crust beneath our feet all the world over.”

(BBC)



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Foreign News

Ex-White House teleprompter operator ordered to pay $172,000 for Trump speech bets

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The staffer was found to have made tens of thousands of dollars through betting on what the president would say in his speeches (BBC)

A former White House teleprompter operator has been ordered to pay more than $172,000 (£127,000) for using inside information to bet on US President Donald Trump’s speeches.

Gabriel Perez was found to have made trades on what the president would say during addresses between December 2025 and February 2026 on Kalshi – a prediction markets platform where users can bet on real-world events.

Its regulator, the Commodity Futures Trading Commission (CFTC), said Perez would have to surrender profits of $107,539.02 (£79,452) and pay a civil penalty of $65,000 (£48,000).

The White House has not yet commented. In July then press secretary Karoline Leavitt said  Perez was on unpaid leave and would not return to his post.

Announcing the settlement on Friday, the CFTC said Perez had “misappropriated” his prior knowledge of Trump’s speeches to place bets “in breach of his duty of trust and confidence”.

It said his civil penalty had been reduced due to his “exemplary co-operation” with the investigation.

Perez has also been banned from trading for three years.

Writing on X, Kalshi’s lead lawyer Bobby DeNault welcomed the decision: “It doesn’t matter who you are: violate our rules or federal law and you will face the consequences.”

(BBC)

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Iran, Qatar hold Hormuz talks amid int’l hopes dialogue with US will resume

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Qatar's Prime Minister and Foreign Minister Sheikh Mohammed bin Abdulrahman bin Jassim Al Thani (centre-left) and his delegation meet Iran's Foreign Minister Abbas Araghchi (centre-right) in Tehran on August 27, 2026

Qatar’s prime minister has held meetings in the Iranian capital, discussing key issues including the future of the Strait of Hormuz, amid international hopes that dialogue between the United States and Iran on ending the war will resume.

Iran’s Foreign Minister Abbas Araghchi and Qatar’s Sheikh Mohammed bin Abdulrahman bin Jassim Al Thani on Thursday discussed a proposed framework that includes the creation of a temporary shipping corridor through the Strait of Hormuz, as well as a possible “joint project” to clear the strait of mines, the Qatari Ministry of Foreign Affairs said in a statement. Iran says the mines were laid during the war.

The two officials also reviewed “the latest developments in the regional situation … along with the efforts being made to reduce escalation and create appropriate conditions for dialogue, contributing to the enhancement of regional security and stability”, the statement added.

Sheikh Mohammed, who is both prime minister and foreign minister of Qatar, later met separately with Iranian President Masoud Pezeshkian and parliament speaker and top negotiator, Mohammad Bagher Ghalibaf.

Ghalibaf emphasised the need to de-escalate regional tensions, according to Iran’s Tasnim news agency. He and Sheikh Mohammed also exchanged views on the current developments in the region and efforts to create suitable conditions for resuming dialogue, the report added.

“Qatar believes that dialogue and diplomatic solutions remain the optimal path for addressing disputes and overcoming crises,” Sheikh Mohammed said in a post on X, adding that his discussions in Tehran serve as “confirmation of our continued efforts to de-escalate tensions … while opening the door to peaceful solutions – including underscoring the importance of respecting freedom of navigation in the Strait of Hormuz in accordance with international law.”

Sheikh Mohammed also met with Iran’s security chief, Mohsen Rezai.

Rezai told him the “US must first take practical steps to fulfil Iran’s conditions and then Iran will proceed to open the Strait of Hormuz”, the Islamic Republic News Agency (IRNA) reported.

Rezai also reiterated previous pledges by Tehran that if Washington “starts any evil”, Iran would “bring disaster to its military and economic interests”.

Sheikh Mohamed’s visit follows a week of intense diplomacy in Iran involving separate meetings with Oman’s Foreign Minister Badr Albusaidi and senior Pakistani officials seeking ways to end the US-Israel war on Iran and reopen the strategic waterway through which about 20 percent of the world’s oil passes in peacetime.

[Aljazeera]

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At least eight killed, hundreds missing after Nepal flash flood

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Residents watch a torrent of muddy water surge through a river after flash floods in Nepal [Aljazeera]

Nepal sent helicopters to the rescue after a huge flash ⁠flood swept away villages, killing at least eight people and damaging roads, bridges and power projects in areas near Tibet, authorities said.

Officials said 384 tourists, including 291 from countries including the United Kingdom, the United States, India and Malaysia were reported missing as a result of the flash flood on Wednesday.

The waters were too high for helicopters to land in Nepal’s affected areas of Syapru Besi and Timure in the mountainous district of Rasuwa, with a population of about 50,000, officials said.

“There could be heavy casualties or loss of property,” district administrator Narendra ‌Pariyar told the Reuters news agency. “But I cannot say for sure now.”

Pariyar urged those living on the banks of the Bhote Koshi River in the area to seek higher ground, pointing to reports that nearby villages and infrastructure project sites were washed away.

Across the border, Tibet reported “major casualties” with people missing in the neighbouring county of Gyirong after a mudslide ⁠hit a land crossing between China and Nepal, the Xinhua official news agency said.

The mudslide hit China’s Gyirong port, cutting off roads, communications and power in the Shigatse region, Xinhua added, without giving details.

President Xi Jinping urged “all-out” efforts to search ⁠for the missing, and ⁠called for strengthening monitoring and early warning systems to prevent secondary disasters.

Prayash Adhikari, a climate justice activist in Nepal, said the “devastating” flood has wiped out “whole villages”

“Hundreds of people are missing,” Adhikari told Al Jazeera from Kathmandu, stating it wiped out buildings, schools, bridges and highways.

Videos shared by Nepal Police and others on social media showed torrents of muddy water crashing through mountain valleys.

Many people were caught off guard when the flash flood hit, as there was no heavy rainfall, said Kosh Raj Koirala, an editor of Republica Daily, an English newspaper in Nepal’s capital.

“People were at home … several houses have been washed away, swept away by the river,” Koirala told Al Jazeera.

Prime Minister Balendra Shah convened an emergency meeting of the National Disaster Risk Reduction and Management Authority to take stock of the situation.

“Work has started to take necessary steps in coordination with the medical team, scouts, and Red Cross,” Shah said in a social media post.

Damaged property and flooded roads following a flash flood in Galchhi in the Dhading district, Nepal, August 26, 2026. Picture taken with a mobile phone. REUTERS/Stringer
Damaged property and flooded roads following a flash flood in Galchhi in the Dhading district, Nepal [Aljazeera]

The Nepal Army said it had deployed helicopters and disaster response personnel to the affected area.

“The work of collecting details of the damage is under way,” it said in a statement.

The Nepal Electricity Authority said about 430 megawatts of production capacity, including from hydropower and solar facilities, have been damaged.

“The disaster has damaged the production, transmission and distribution facilities of the Authority … resulting in disruption of electricity supply,” it said.

Several highways were also closed, according to the authorities.

‘Glacial lake outburst’ could be underlying cause

Climate experts at the International Centre for Integrated Mountain Development in Nepal say an avalanche from a glacier likely caused the flash flood.

The Lhende Khola River, a tributary of the Bhote Koshi River, witnessed maximum flooding on Wednesday, they said.

“The Lhende Khola has flooded twice in 14 months, this time triggered by an ice rock avalanche from a glacier on the Nepal side that blocked the river and released a sudden surge downstream,” said Saswata Sanyal, a disaster risk reduction specialist at the climate research group.

Adhikari, the climate activist, told Al Jazeera that early warning systems are crucial to protect communities.

“This can’t be completely turned around because we are on the verge of climate catastrophe, but still we can protect our communities,” he said.

The ⁠Bhote Koshi River originates in Tibet ⁠and empties into Nepal’s Trishuli River, which eventually flows into India as the Gandak River.

A flood last year in the Bhote Koshi River killed nine people, ‌with 24 missing, and washed away the “Friendship Bridge” linking Nepal and China, disrupting transport and trade for several months. That flood ‌was ‌triggered by the draining of a supraglacial lake in Tibet, a regional climate monitor said.

Monsoon rains from June to September regularly trigger deadly floods and landslides across South Asia.

Scientists say climate change is increasing the frequency and intensity of extreme weather events in the region.

Damaged houses stand precariously near the swollen, debris-choked banks of the Trishuli river after flash floods in Nepal’s Nuwakot district [Aljazeera]

[Aljazeera]

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