#seiche — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #seiche, aggregated by home.social.
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Retreating Glaciers Risk Tsunamis
On 10 August 2025, the slopes of Alaska’s Tracy Arm Fjord gave way, sliding into the water. The resulting tsunami was the second-largest ever recorded, with a 481-meter runup after a 100-meter initial wave that moved at more than 70 meters per second. The fjord was fortunately empty at the time, though it is regularly visited by cruise ships. After the landslide, a seiche ricocheted through the fjord for 36 hours.
With no earthquake to trigger the tsunami, researchers had to piece together the accident through forensics. Their study concluded that the glacier’s retreat had left unstable slopes exposed, likening it to a child’s closet overstuffed with hastily gathered toys. The moment the door is no longer held closed, everything comes crashing out.
Ultimately, the landslide-induced tsunami is, therefore, a result of climate change. That result is disconcerting, given the increasing frequency of cruise ships visiting glacial fjords. Unlike earthquake-induced tsunamis, landslide-induced ones like the Tracy Arm event don’t come with a seismic warning. With rapid climate change and frequent tourism, risk management is critical. (Image credit: C. Read/USGS; research credit: D. Shugar et al.; via Eos)
An image showing the aftermath of the 10 August, 2025 landslide in Alaska’s Tracy Arm Fjord, which caused the second largest tsunami recorded. The light rock slope shows where material fell from. On the lower right, the foot of the South Sawyer Glacier is just visible. #climateChange #fluidDynamics #geophysics #landslide #physics #science #seiche #standingWave #tsunami -
Retreating Glaciers Risk Tsunamis
On 10 August 2025, the slopes of Alaska’s Tracy Arm Fjord gave way, sliding into the water. The resulting tsunami was the second-largest ever recorded, with a 481-meter runup after a 100-meter initial wave that moved at more than 70 meters per second. The fjord was fortunately empty at the time, though it is regularly visited by cruise ships. After the landslide, a seiche ricocheted through the fjord for 36 hours.
With no earthquake to trigger the tsunami, researchers had to piece together the accident through forensics. Their study concluded that the glacier’s retreat had left unstable slopes exposed, likening it to a child’s closet overstuffed with hastily gathered toys. The moment the door is no longer held closed, everything comes crashing out.
Ultimately, the landslide-induced tsunami is, therefore, a result of climate change. That result is disconcerting, given the increasing frequency of cruise ships visiting glacial fjords. Unlike earthquake-induced tsunamis, landslide-induced ones like the Tracy Arm event don’t come with a seismic warning. With rapid climate change and frequent tourism, risk management is critical. (Image credit: C. Read/USGS; research credit: D. Shugar et al.; via Eos)
An image showing the aftermath of the 10 August, 2025 landslide in Alaska’s Tracy Arm Fjord, which caused the second largest tsunami recorded. The light rock slope shows where material fell from. On the lower right, the foot of the South Sawyer Glacier is just visible. #climateChange #fluidDynamics #geophysics #landslide #physics #science #seiche #standingWave #tsunami -
Film en français - 52' - dès 6 ans, suggéré 6 ans
Prix du meilleur film wildlife européen 2026Le long des côtes bretonnes, Sepia, une jeune seiche, explore un monde sous-marin à la fois riche et fragile. Dotée de talents étonnants, elle apprend à chasser, à échapper aux marées et à survivre face à la pollution et au changement climatique. Son voyage, jalonné de défis, la mènera vers sa mission ultime : perpétuer son espèce.
Les projections dans le canton voir en commentaire
#seiche -
#LakeErie #seiche
Lake Erie seiche after bomb cyclone.
Beach combing in winter
https://www.youtube.com/watch?v=8-IK5rnEn4o -
#LakeErie #seiche
Lake Erie seiche after bomb cyclone.
Beach combing in winter
https://www.youtube.com/watch?v=8-IK5rnEn4o -
Oh ! Deux nouveaux lecteurs !
Ce soir on danse : illustrations de @la_jeanette_
aux @editionscipango°° Un livre de #borddemer °°
#albumjeunesse #livrejeunesse #litteraturejeunesse #livre #lecture #illustration #edition #librairie #bibliotheque #mediatheque #bigorneaux #crevettes #hippocampe #ocean #littoral #zostères #seiche #herbiersmarins #littoral #mer #nature #environnement #bretagne #cotedemeraude #saintmalo #dinard #jeunesse #maree #estran
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Searching for the Seiche
On 16 September 2023, seismometers around the world began ringing, registering a signal that — for 9 days — wobbled back and forth every 92 seconds. A second, similar signal appeared a month later, lasting about a week. Researchers tracked the signal’s origin to a remote fjord in East Greenland, where it appeared a glacier front had collapsed. The falling rocks and ice triggered a long-lasting wave — a seiche — that rang back and forth through the fjord for days.
Simulations showed that a seiche was plausible from a rockfall like the two that caused the seismic signal, but, without first-hand observations, no one could be certain. Now a new study has looked at satellite data to confirm the seiche. Researchers found that the then-new Surface Water and Ocean Topography (SWOT) satellite and its high-resolution altimeters had passed over the fjord multiple during the two landslide events. And, sure enough, the satellite captured data showing the water surface in the fjord rising and falling as the seiche ricocheted back and forth.
It’s a great reminder that having multiple instrument types monitoring the Earth gives us far better data than any singular one. Without both seismometers and the satellite, it’s unlikely that scientists could have truly confirmed a seiche that no one saw firsthand. (Image credit: S. Rysgaard; research credit: T. Monahan et al.; via Eos)
#fluidDynamics #geophysics #physics #planetaryScience #science #seiche
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Searching for the Seiche
On 16 September 2023, seismometers around the world began ringing, registering a signal that — for 9 days — wobbled back and forth every 92 seconds. A second, similar signal appeared a month later, lasting about a week. Researchers tracked the signal’s origin to a remote fjord in East Greenland, where it appeared a glacier front had collapsed. The falling rocks and ice triggered a long-lasting wave — a seiche — that rang back and forth through the fjord for days.
Simulations showed that a seiche was plausible from a rockfall like the two that caused the seismic signal, but, without first-hand observations, no one could be certain. Now a new study has looked at satellite data to confirm the seiche. Researchers found that the then-new Surface Water and Ocean Topography (SWOT) satellite and its high-resolution altimeters had passed over the fjord multiple during the two landslide events. And, sure enough, the satellite captured data showing the water surface in the fjord rising and falling as the seiche ricocheted back and forth.
It’s a great reminder that having multiple instrument types monitoring the Earth gives us far better data than any singular one. Without both seismometers and the satellite, it’s unlikely that scientists could have truly confirmed a seiche that no one saw firsthand. (Image credit: S. Rysgaard; research credit: T. Monahan et al.; via Eos)
#fluidDynamics #geophysics #physics #planetaryScience #science #seiche
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"On September 16th, 2023, an anomalous 10.88 mHz seismic signal was observed globally, persisting for 9 days. One month later an identical signal appeared, lasting for another week. Several studies have theorized that these signals were produced by seiches which formed after two landslide-generated mega-tsunamis in an East Greenland fjord. This theory is supported by seismic inversions, and analytical and numerical modeling, but no direct observations have been made. Here, we present primary observations of this phenomenon using data from the Surface Water Ocean Topography mission. By ruling out other oceanographic processes, we validate the seiche theory of previous authors and independently estimate its initial amplitude at 7.9 m using Bayesian machine learning and seismic data."
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"On September 16th, 2023, an anomalous 10.88 mHz seismic signal was observed globally, persisting for 9 days. One month later an identical signal appeared, lasting for another week. Several studies have theorized that these signals were produced by seiches which formed after two landslide-generated mega-tsunamis in an East Greenland fjord. This theory is supported by seismic inversions, and analytical and numerical modeling, but no direct observations have been made. Here, we present primary observations of this phenomenon using data from the Surface Water Ocean Topography mission. By ruling out other oceanographic processes, we validate the seiche theory of previous authors and independently estimate its initial amplitude at 7.9 m using Bayesian machine learning and seismic data."
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#Tsunamis #science #seiche #climatechange
For 9 days in 2023 scientists picked up a pulse every 90 seconds. This remained a mystery. It happened again just a month later. Using technology and satellites they were able to establish that the pulse came from massive waves created by landslides. The landslides created waves that bounced back and forth causing the pulse every 90 seconds. So they are seiche events rather than Tsunamis and are a result of climate change. https://www.discovermagazine.com/planet-earth/the-earth-mysteriously-pulsed-every-90-seconds-for-nine-days-in-2023-we-now
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#Tsunamis #science #seiche #climatechange
For 9 days in 2023 scientists picked up a pulse every 90 seconds. This remained a mystery. It happened again just a month later. Using technology and satellites they were able to establish that the pulse came from massive waves created by landslides. The landslides created waves that bounced back and forth causing the pulse every 90 seconds. So they are seiche events rather than Tsunamis and are a result of climate change. https://www.discovermagazine.com/planet-earth/the-earth-mysteriously-pulsed-every-90-seconds-for-nine-days-in-2023-we-now
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🔁 Vigicrues (@Vigicrues)
Maintien en #vigilanceRouge de #Vilaine aval, descente en #VigilanceOrange de #Vilaine médiane, et maintien de #Oise moyenne, #Thérain, #Somme, #Epte, #Vilaine amont, #Seiche, #Sarthe aval.
Restez informé sur http://www.vigicrues.gouv.fr et l'appli #Vigicrues.🐦🔗 https://twitter.com/Vigicrues/status/1885192040301973585
🕐 31/01 06:03 -
🔁 Vigicrues (@Vigicrues)
Maintien en #vigilanceRouge de #Vilaine aval, descente en #VigilanceOrange de #Vilaine médiane, et maintien de #Oise moyenne, #Thérain, #Somme, #Epte, #Vilaine amont, #Seiche, #Sarthe aval.
Restez informé sur http://www.vigicrues.gouv.fr et l'appli #Vigicrues.🐦🔗 https://twitter.com/Vigicrues/status/1885192040301973585
🕐 31/01 06:03 -
🔁 Vigicrues (@Vigicrues)
Maintien #VigilanceRouge #Vilaine médiane (dép 35) et aval (dép. 35, 44, 56) et de la #Seiche (dép 35)
Passage en #VigilanceOrange #Sarthe aval (dep 72)
Maintien #VigilanceOrange #Oust, #Vilaine amont, #Oudon, #Orne, #Meu, #Ille-Illet
infos sur https://vigicrues.gouv.fr et l'appli🐦🔗 https://twitter.com/Vigicrues/status/1884526642581684725
🕐 29/01 09:58 -
🔁 Vigicrues (@Vigicrues)
Maintien #VigilanceRouge #Vilaine médiane (dép 35) et aval (dép. 35, 44, 56) et de la #Seiche (dép 35)
Passage en #VigilanceOrange #Sarthe aval (dep 72)
Maintien #VigilanceOrange #Oust, #Vilaine amont, #Oudon, #Orne, #Meu, #Ille-Illet
infos sur https://vigicrues.gouv.fr et l'appli🐦🔗 https://twitter.com/Vigicrues/status/1884526642581684725
🕐 29/01 09:58 -
🔁 Vigicrues (@Vigicrues)
Maintien en #vigilanceRouge crues de la #Vilaine médiane (dép 35) et aval (dép. 35, 44, 56) et de la #Seiche (dép 35).
Maintien en #vigilanceOrange crues des cours d'eau : #Oust, #Vilaine amont, #Oudon, #Orne, #Meu.
Restez informés sur http://vigicrues.gouv.fr et l'app mobile🐦🔗 https://twitter.com/Vigicrues/status/1884254592571183304
🕐 28/01 15:57 -
🔁 Vigicrues (@Vigicrues)
Maintien en #vigilanceRouge crues de la #Vilaine médiane (dép 35) et aval (dép. 35, 44, 56) et de la #Seiche (dép 35).
Maintien en #vigilanceOrange crues des cours d'eau : #Oust, #Vilaine amont, #Oudon, #Orne, #Meu.
Restez informés sur http://vigicrues.gouv.fr et l'app mobile🐦🔗 https://twitter.com/Vigicrues/status/1884254592571183304
🕐 28/01 15:57 -
🔁 Ministère de l'Intérieur - Alerte (@Beauvau_Alerte)
🔴 La #VigilanceRouge pour #crues qui touche l’’#IlleEtVilaine s’étend à la #LoireAtlantique et au #Morbihan.
Des crues majeures sont attendues sur les tronçons de #Seiche, #VilaineAval et #VilaineMédiane.
Soyez très vigilants et tenez-vous informés sur https://vigilance.meteofrance.fr
🐦🔗 https://twitter.com/Beauvau_Alerte/status/1884125134040219816
🕐 28/01 07:23 -
🔁 Ministère de l'Intérieur - Alerte (@Beauvau_Alerte)
🔴 La #VigilanceRouge pour #crues qui touche l’’#IlleEtVilaine s’étend à la #LoireAtlantique et au #Morbihan.
Des crues majeures sont attendues sur les tronçons de #Seiche, #VilaineAval et #VilaineMédiane.
Soyez très vigilants et tenez-vous informés sur https://vigilance.meteofrance.fr
🐦🔗 https://twitter.com/Beauvau_Alerte/status/1884125134040219816
🕐 28/01 07:23 -
🔁 Vigicrues (@Vigicrues)
Maintien en Vigilance Orange de 5 tronçons #OiseAmont(02) #VilaineMédiane(35),#Seiche(35),#Epte (27,95),#ThouetAval(49). 101 tronçons en #VigilanceJaune dans 55 dépt. Restons vigilants, les crues continuent malgré l'arrêt des pluies!
🐦🔗 https://twitter.com/Vigicrues/status/1877944296168468959
🕐 11/01 06:03 -
🔁 Vigicrues (@Vigicrues)
Maintien en Vigilance Orange de 5 tronçons #OiseAmont(02) #VilaineMédiane(35),#Seiche(35),#Epte (27,95),#ThouetAval(49). 101 tronçons en #VigilanceJaune dans 55 dépt. Restons vigilants, les crues continuent malgré l'arrêt des pluies!
🐦🔗 https://twitter.com/Vigicrues/status/1877944296168468959
🕐 11/01 06:03 -
Bizarre, nine-day #seismic signal caused by epic #landslide in #Greenland
The source of the signal was eventually traced back to a massive landslide in Greenland’s remote #DicksonFjord. A staggering volume of rock and ice, enough to fill 10,000 Olympic-sized swimming pools, plunged into the #fjord, triggering a 200-meter-high mega-tsunami and a phenomenon known as a #seiche: a wave in the icy fjord that continued to slosh back and forth, some 10,000 times over nine days.
https://arstechnica.com/science/2024/09/bizarre-nine-day-seismic-signal-caused-by-epic-landslide-in-greenland/ -
Bizarre, nine-day #seismic signal caused by epic #landslide in #Greenland
The source of the signal was eventually traced back to a massive landslide in Greenland’s remote #DicksonFjord. A staggering volume of rock and ice, enough to fill 10,000 Olympic-sized swimming pools, plunged into the #fjord, triggering a 200-meter-high mega-tsunami and a phenomenon known as a #seiche: a wave in the icy fjord that continued to slosh back and forth, some 10,000 times over nine days.
https://arstechnica.com/science/2024/09/bizarre-nine-day-seismic-signal-caused-by-epic-landslide-in-greenland/ -
A Rockslide-Generated Tsunami In A Greenland Fjord Rang Earth For 9 Days
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https://doi.org/10.1126/science.adm9247 <-- shared paper
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#GIS #spatial #mapping #seiche #tsunami #model #modeling #observation #massmovement #engineeringgeology #debrisflow #landslide #massmovement #risk #hazard #spatialanalysis #spatiotemporal #Greenland #seismic #seismology #DicksonFjord #fjord #rockslide #climatechange #standingwaves #cryosphere #hydrosphere #masswasting #geomorphology #geomorphometry #tsunamigenic #glacier #glacial #melting #amplitude #lithosphere #naturalhazard -
A Rockslide-Generated Tsunami In A Greenland Fjord Rang Earth For 9 Days
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https://doi.org/10.1126/science.adm9247 <-- shared paper
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#GIS #spatial #mapping #seiche #tsunami #model #modeling #observation #massmovement #engineeringgeology #debrisflow #landslide #massmovement #risk #hazard #spatialanalysis #spatiotemporal #Greenland #seismic #seismology #DicksonFjord #fjord #rockslide #climatechange #standingwaves #cryosphere #hydrosphere #masswasting #geomorphology #geomorphometry #tsunamigenic #glacier #glacial #melting #amplitude #lithosphere #naturalhazard -
I'd seen a few news items about the #Greenland #tsunami which caused a 9-day ringing seismic signal; but it's way clearer to me after seeing images and explanation from some of the scientists involved
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"In September 2023, earthquake-detection equipment around the world picked up a signal that lasted nine days.
A study today shows the signal was produced by a landslide into a #Greenland #fjord, which created a 200m-high wave that sloshed back and forth like water in a bathtub, [a #seiche].
The signal was detected around the world — as far away as Australia and Antarctica — seemingly causing the entire planet to "ring" like a bell."
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"In September 2023, earthquake-detection equipment around the world picked up a signal that lasted nine days.
A study today shows the signal was produced by a landslide into a #Greenland #fjord, which created a 200m-high wave that sloshed back and forth like water in a bathtub, [a #seiche].
The signal was detected around the world — as far away as Australia and Antarctica — seemingly causing the entire planet to "ring" like a bell."
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Vor einem Jahr registrierten Seismometer weltweit anhaltende Erschütterungen – neun Tage lang bebte die gesamte Erde. Aber warum? Den Grund dafür haben nun Geologen identifiziert. #Erdbeben #Tsunami #Seiche #Fjord #Rutschung #Groenland
https://www.scinexx.de/news/geowissen/als-die-welt-neun-tage-lang-bebte/ -
Vor einem Jahr registrierten Seismometer weltweit anhaltende Erschütterungen – neun Tage lang bebte die gesamte Erde. Aber warum? Den Grund dafür haben nun Geologen identifiziert. #Erdbeben #Tsunami #Seiche #Fjord #Rutschung #Groenland
https://www.scinexx.de/news/geowissen/als-die-welt-neun-tage-lang-bebte/ -
Two ferries stranded by the 12/22 #Seiche. They're sitting on the bottom with no water in sight.
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Island in Lake Erie exposed by last year's #Seiche. Water level dropped by about 6 feet.
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Lake Erie gets this thing called a #Seiche. When there are high winds from the West, water sloshes East.
Currently water level's dropped 5 feet on the Western end and is 5 feet higher on the Eastern.
Biologists are counting the number and species of native mussels exposed. Almost all of them endangered. Most of them will die from the cold ( 1 degree F ). -
Bonjour !
Soyons originaux ! Pour mon anniversaire, c'est moi qui vous fait un petit cadeau ^^. Une petite bête rarement appréciée, mais qui a quand même une bouille sympa ! Une seiche :).
Bonne journée !!(en fait, c'était hier, mais un bug m'a empêchée de poster XD)
#seiche #animauxmarins #illustration #entrainement #mastoart #speedpainting
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Bonjour !
Soyons originaux ! Pour mon anniversaire, c'est moi qui vous fait un petit cadeau ^^. Une petite bête rarement appréciée, mais qui a quand même une bouille sympa ! Une seiche :).
Bonne journée !!(en fait, c'était hier, mais un bug m'a empêchée de poster XD)
#seiche #animauxmarins #illustration #entrainement #mastoart #speedpainting
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@WiccanTexan
There's a massive seiche in Lake Erie- water level's down 80+ inches on the Western side, with a corresponding rise in the East.When it sloshes back, there'll be a big wave of water and ice.
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High winds have moved the waters of Lake Erie towards Buffalo, dropping water levels by 80" and more on the Western side. Rivers feeding into the lake have dropped accordingly. This is an island in the lake near Put-In-Bay.
When the water comes back, it will be a huge wave of ice and water roaring Westward.
A bit like when the ocean leaves before the tsunami.
