Latest news with #ThomasMonahan
Yahoo
19-06-2025
- Business
- Yahoo
One Heidrick & Struggles International Insider Raised Their Stake In The Previous Year
Viewing insider transactions for Heidrick & Struggles International, Inc.'s (NASDAQ:HSII ) over the last year, we see that insiders were net buyers. This means that a larger number of shares were purchased by insiders in relation to shares sold. While we would never suggest that investors should base their decisions solely on what the directors of a company have been doing, logic dictates you should pay some attention to whether insiders are buying or selling shares. This technology could replace computers: discover the 20 stocks are working to make quantum computing a reality. The insider, Sarah Payne, made the biggest insider sale in the last 12 months. That single transaction was for US$351k worth of shares at a price of US$40.40 each. That means that even when the share price was below the current price of US$42.98, an insider wanted to cash in some shares. As a general rule we consider it to be discouraging when insiders are selling below the current price, because it suggests they were happy with a lower valuation. However, while insider selling is sometimes discouraging, it's only a weak signal. It is worth noting that this sale was only 36% of Sarah Payne's holding. Thomas Monahan bought 17.50k shares over the last 12 months at an average price of US$43.86. You can see the insider transactions (by companies and individuals) over the last year depicted in the chart below. By clicking on the graph below, you can see the precise details of each insider transaction! Check out our latest analysis for Heidrick & Struggles International There are always plenty of stocks that insiders are buying. If investing in lesser known companies is your style, you could take a look at this free list of companies. (Hint: insiders have been buying them). Looking at the total insider shareholdings in a company can help to inform your view of whether they are well aligned with common shareholders. A high insider ownership often makes company leadership more mindful of shareholder interests. Insiders own 1.2% of Heidrick & Struggles International shares, worth about US$11m. While this is a strong but not outstanding level of insider ownership, it's enough to indicate some alignment between management and smaller shareholders. There haven't been any insider transactions in the last three months -- that doesn't mean much. On a brighter note, the transactions over the last year are encouraging. Insiders own shares in Heidrick & Struggles International and we see no evidence to suggest they are worried about the future. So while it's helpful to know what insiders are doing in terms of buying or selling, it's also helpful to know the risks that a particular company is facing. While conducting our analysis, we found that Heidrick & Struggles International has 2 warning signs and it would be unwise to ignore them. Of course, you might find a fantastic investment by looking elsewhere. So take a peek at this free list of interesting companies. For the purposes of this article, insiders are those individuals who report their transactions to the relevant regulatory body. We currently account for open market transactions and private dispositions of direct interests only, but not derivative transactions or indirect interests. — Investing narratives with Fair Values Vita Life Sciences Set for a 12.72% Revenue Growth While Tackling Operational Challenges By Robbo – Community Contributor Fair Value Estimated: A$2.42 · 0.1% Overvalued Vossloh rides a €500 billion wave to boost growth and earnings in the next decade By Chris1 – Community Contributor Fair Value Estimated: €78.41 · 0.1% Overvalued Intuitive Surgical Will Transform Healthcare with 12% Revenue Growth By Unike – Community Contributor Fair Value Estimated: $325.55 · 0.6% Undervalued View more featured narratives — Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team (at) article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned. Error while retrieving data Sign in to access your portfolio Error while retrieving data
Yahoo
10-06-2025
- Science
- Yahoo
For 9 Days, Earth Was Sending Out Mysterious Signals. Now We Know What They Were.
"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Here's what you'll learn when you read this story: Strange signals coming from the Arctic in 2023 were assumed to be a seiche (trapped water with waves sloshing back and forth), but this was never confirmed. Previous instruments used to measure seismic weather phenomena were not able to pick up enough information, but NASA's SWOT satellite eventually found that the signal actually was from a seiche caused by a landslide. Reconstructions of what the weather was like during the days SWOT picked up the signal also show that it couldn't have been anything but a seiche. As fascinating as bizarre signals from other planets can be—teaching us about earthquakes on Mars or auroras in the skies of Jupiter—sometimes even weirder signals come from weather extremes happening right here on Earth. For nine days in 2023, an unknown seismic pulse was generated by the Earth every 90 seconds. It first appeared that September, vanished, and then returned in October. The signals began after a landslide triggered by a megatsunami in Dickson Fjord, Greenland, and was thought to have been produced by a seiche, or standing wave. This wave had probably been stirred up by the tsunami and then trapped by ice in the fjord—but there was no way to prove it. Satellite observations were able to document avalanches and the tsunamis they caused, and scientists collected further data in a research station. There was just one problem—the hypothesized seiche was eluding detection. It remained a mystery, even though studies at the time found seismic data that seemed to align with the sloshing motions of standing waves. So, researcher Thomas Monahan of Oxford University decided to take a closer look. Using data from the KaRIn (Ka-band Radar Interferometer) instrument on board NASA's Surface Water Ocean Topography (SWOT) satellite—an international collaboration capable of high-resolution measurements that extended into Dickson fjord—Monahan and his team finally found evidence for a seiche whose waves were slowly losing intensity. 'Based on the seismic attribution, and systematic ruling out of other dynamic phenomena, we conclude that the observed variability in the SWOT data is consistent with that of a slowly decaying seiche,' the team wrote in a study recently published in Nature Communications. Seiches can occur in lakes and other enclosed (or partially enclosed) bodies of water. The tsunami unleashed in Dickson Fjord had enough strength to leave powerful winds and sudden atmospheric pressure shifts in its wake, pushing water from one end of the enclosure to the other. The water then sloshed back and forth, oscillating for anywhere from hours to days after winds ceased. Tsunamis are often seismic phenomena, and the very long period (VLP) seismic signal that came from the fjord was the aftermath of a tsunamigenic landslide. Previous attempts at recording evidence for this particular seiche had been thwarted by the limitations of satellite altimeters, which did not pick up data during extended gaps between observations. They were also not able to record the differences in the height of waves beyond the area directly under the satellite. They were, however, able to get an especially accurate read on the water below. The landslides in Dickson Fjord happened right when SWOT was transitioning to its Science phase, during which it would orbit and survey most of the planet's surface from an altitude of 890 km (553 miles) for 21 days. This orbit was purposely out of sync with the Sun to lower the chances of misidentifying signal frequencies. The researchers went through the data from every pass the satellite made over the region for the weeks in September and October and used this data to create maps of the fjord, modeling it how would have behaved during different times after the landslide and the height differences between waves (which reached up to two meters, or about 6.5 feet). Reconstructions of weather conditions ruled out all other possible causes behind the signal, and convinced scientists that it could only have been caused by a seiche. 'This study shows how we can leverage the next generation of satellite earth observation technologies to study these processes,' Monahan said in a recent press release. 'SWOT is a game changer for studying oceanic processes in regions such as fjords which previous satellites struggled to see into.' You Might Also Like The Do's and Don'ts of Using Painter's Tape The Best Portable BBQ Grills for Cooking Anywhere Can a Smart Watch Prolong Your Life?
BBC News
07-06-2025
- Science
- BBC News
Oxford study finds 'extraordinary' tremors caused by tsunamis
A series of "extraordinary" tremors observed across the globe were caused by two tsunamis stranded within a fjord in Greenland, a new study has September and October 2023, the "bizarre" seismic activity was observed every 90 seconds over intermittent periods each University of Oxford-led research confirmed it was caused by two mega tsunamis, which occurred after the warming of a glacier led to two major tsunamis became trapped standing waves that surged back and forth within the remote Dickson fjord in eastern Greenland, causing the tremors, the study found. The research's lead author Thomas Monahan, from the University of Oxford, said: "Climate change is giving rise to new, unseen extremes."These extremes are changing the fastest in remote areas, such as the Arctic, where our ability to measure them using physical sensors is limited." To conduct the study into what researchers called the "extraordinary" tremors , scientists used new techniques to interpret data recorded by satellites orbiting the altimetry data measures the height of the Earth's surface by recording how long it takes for a radar pulse to travel from a satellite to the surface and back altimeters were unable to record evidence of the Greenland tsunamis, but a satellite launched in December 2022 had the equipment capable of doing so - allowing researchers to observe the trapped waves."This study shows how we can leverage the next generation of satellite earth observation technologies to study these processes," Mr Monahan of the study Prof Thomas Adcock added: "This study is an example of how the next generation of satellite data can resolve phenomena that has remained a mystery in the past."We will be able to get new insights into ocean extremes such as tsunamis, storm surges, and freak waves." You can follow BBC Oxfordshire on Facebook, X (Twitter), or Instagram.
Economic Times
07-06-2025
- Science
- Economic Times
Dickson Fjord's 650-foot mega-tsunami: How a giant wave sent shockwaves worldwide
Mega-tsunamis rock Greenland's Fjord Seiches vs. Tsunamis: The science behind the waves Live Events How advanced satellites and machine learning solved the puzzle Climate Change: The silent driver A breakthrough in Earth monitoring (You can now subscribe to our (You can now subscribe to our Economic Times WhatsApp channel In September 2023, seismic stations worldwide began picking up an unusual, rhythmic signal repeating every 90 seconds. This steady pulse continued for nine days and returned briefly a month later. It was faint, unlike a typical earthquake, but strong enough to register across continents—from Alaska to Australia. Scientists were baffled. No known earthquake, volcanic eruption, or explosion had caused source was traced to the remote Dickson Fjord in East Greenland, a narrow inlet bordered by towering cliffs. But what exactly had triggered this steady, global beat?The answer lay in a massive natural disaster: on 16 September 2023, more than 25 million cubic metres of rock and ice—a volume large enough to fill 10,000 Olympic swimming pools—collapsed from the mountainside into Dickson Fjord. This triggered a mega-tsunami with waves reaching 650 feet high, about half the height of the Empire State waves surged along the two-mile-long fjord, smashing against cliffs and bouncing back, creating a prolonged sloshing motion known as a seiche. Unlike tsunamis, which travel outward as single giant waves, seiches occur when water oscillates repeatedly in an enclosed space. This ongoing motion produced rhythmic seismic pulses detectable around the are caused by sudden, large displacements of water—usually due to earthquakes, landslides, or volcanic eruptions—and travel as single massive waves. Seiches, however, are standing waves formed in enclosed or semi-enclosed bodies of water, like lakes or fjords. They can be triggered by landslides or strong winds, causing the water to rock back and forth in a steady Dickson Fjord, the narrow, enclosed shape trapped the tsunami energy. The waves couldn't escape, so they kept bouncing, sending low-frequency seismic energy through the Earth's crust for mystery was unraveled thanks to the Surface Water and Ocean Topography (SWOT) satellite, a joint NASA and French space agency mission launched in December 2022. Unlike traditional satellites that scan narrow lines, SWOT uses Ka-band Radar Interferometer (KaRIn) technology to map wide swaths of ocean surface in high SWOT data, researchers observed subtle water elevation changes—slopes of up to two metres—sloshing across the fjord. These shifts matched the oscillations expected from fill gaps, scientists employed machine learning to simulate wave behaviour over time. They also analysed crustal deformation data from sensors thousands of kilometres away, plus weather and tidal records, ruling out other causes like researcher Thomas Monahan, a University of Oxford engineering student, said, 'Climate change is giving rise to new, unseen extremes. These changes are happening fastest in remote areas like the Arctic, where our ability to monitor them has historically been limited.'The underlying cause of the landslide was the rapid melting of Greenland's glaciers. As glacier ice shrinks, it removes the natural support holding mountainsides in place. This weakening triggers massive rock and ice explained, 'Climate change is shifting what is typical on Earth, and it can set unusual events into motion.' Past disasters, like a deadly tsunami in Karrat Fjord in 2017, show how these events can devastate local Fjord lies near popular cruise routes, raising concerns about future risks as Arctic tourism grows. Authorities are now exploring early-warning systems combining satellite data and real-time seismic monitoring to protect people in vulnerable event represents a turning point in how we observe and understand Earth's dynamic processes. Professor Thomas Adcock of Oxford said, 'This study is an example of how the next generation of satellite data can resolve phenomena that have remained a mystery in the past.'He added, 'We will be able to get new insights into ocean extremes such as tsunamis, storm surges, and freak waves. To fully harness these data, we need to innovate using both machine learning and ocean physics.'A Danish military vessel patrolled the fjord three days after the first pulse but observed nothing unusual. This shows how even massive natural events can leave little trace without sophisticated monitoring are now searching through historical seismic data for similar slow, rhythmic pulses. Carl Ebeling from UC San Diego said, 'This shows there is stuff out there that we still don't understand and haven't seen before.'Every new discovery will improve forecasts of how landslides, fjord shapes, and water depth interact. The hope is to provide early warnings that could save lives in remote, high-latitude silent, powerful waves in Greenland's fjord prove one thing: the most isolated places on Earth are changing fast—and we must listen carefully to what they tell us.
Daily Tribune
05-06-2025
- Science
- Daily Tribune
Scientists Crack Mystery Behind Planet-Shaking Nine-Day Tremors
A year after the Earth mysteriously trembled every 90 seconds for nine days straight—twice—scientists have finally traced the cause of the bizarre global seismic activity. The long-standing mystery has now been put to rest, thanks to a breakthrough study using cutting-edge satellite technology. In September 2023, seismometers around the world picked up rhythmic tremors occurring at regular 90-second intervals. The unexplained shaking lasted for nine days and reoccurred just a month later. These anomalies defied all known tectonic behavior and left scientists around the globe searching for answers. Now, in a study published in Nature Communications, researchers led by Thomas Monahan, a Schmidt AI in Science Fellow at the University of Oxford, have confirmed that the unusual seismic signals were caused by two colossal landslides in East Greenland's remote Dickson Fjord. These massive collapses triggered equally massive "mega-tsunamis," which in turn produced a phenomenon known as seiches—enormous standing waves that repeatedly sloshed within the fjord, creating rhythmic pulses that shook the Earth's crust. 'Previous studies in 2024 proposed the landslide-tsunami theory based on seismic patterns, but we lacked direct evidence to conclusively prove the link,' said Monahan. 'Our research now confirms it.' The key breakthrough came from data collected by NASA's Surface Water and Ocean Topography (SWOT) satellite, launched in December 2022. Using a unique radar altimetry technique, SWOT is capable of mapping water levels across 90% of Earth's surface in stunning detail. While traditional satellites missed the phenomenon due to infrequent measurements and complex fjord topography, SWOT's high-resolution twin-antenna system succeeded where others failed. The satellite captured the dynamic surface changes in the fjord as the seiches surged back and forth, providing the first-ever direct observations of the event and allowing researchers to match them precisely with the seismic data. 'This is a prime example of how new technology can transform our understanding of natural phenomena,' Monahan noted. The findings not only close a major scientific mystery but also open new pathways for monitoring remote and rugged environments using advanced satellite systems. As Earth's climate continues to shift, such insights could prove vital in understanding and anticipating the impacts of sudden geological events.
