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Stephen Hicks - Seismologist
เข้าร่วมเมื่อ 1 พ.ย. 2013
Stephen Hicks - Greenland tsunami-landslide study - BBC Radio 4 World at One live interview
From 13 September 2024
มุมมอง: 36
วีดีโอ
Seismic & tsunami waves from the September 2023, Dickson Fjord, Greenland landslide & fjord seiche
มุมมอง 104Kหลายเดือนก่อน
For a detailed explanation, please see this video by the same author: th-cam.com/video/60T9TKuuujs/w-d-xo.html. The left panel shows a ground motion visualisation, showing the seismic wave from the Greenland seiche spreading out around the planet. Each circle shows the data from an individual seismic monitoring station. The right panel shows a numerical simulation of the 16 September 2023 tsuna...
How climate change triggered a landslide tsunami in a Greenland fjord, vibrating Earth for 9 days
มุมมอง 131Kหลายเดือนก่อน
Climate change is increasingly exposing polar regions to large landslides. Tsunamigenic landslides have occurred recently in Greenland, but none have been reported from the eastern fjords. In September 2023, we detected the start of a 9-day-long global 10.88 mHz (92 s) monochromatic very-long period (VLP) seismic signal, originating from East Greenland. We demonstrate how this event started wit...
Multivariate statistical appraisal of regional susceptibility to induced seismicity
มุมมอง 902 ปีที่แล้ว
Application to the Permian Basin, SW United States. Fully open-access paper: agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021JB022768
Temporary seismometer installations in Surrey 2018
มุมมอง 1476 ปีที่แล้ว
Brief explanation of the temporary seismometer installations in southern Surrey, UK to better monitor the recent seismic swarm in 2018.
Earthquakes in the Papua New Guinea / New Britain subduction zone
มุมมอง 1036 ปีที่แล้ว
Earthquakes in the Papua New Guinea / New Britain subduction zone
VOiLA Ocean Bottom Seismometer recovery
มุมมอง 2027 ปีที่แล้ว
Retrieval of an ocean bottom seismometer from 4000 m depth in the Caribbean Sea. Part of a scientific project to understand Earth's water cycle within tectonic plates. More details on the project: www.voila.ac.uk
VOiLA project - ocean bottom seismometer recovery - underwater view
มุมมอง 1377 ปีที่แล้ว
VOiLA project - ocean bottom seismometer recovery - underwater view
Computer simulation of the 2010 M8.8 Maule, Chile earthquake
มุมมอง 2K9 ปีที่แล้ว
Simulation shows the passage of seismic waves from the 2010 magnitude 8.8 Maule, Chile earthquake causing the ground to shake (shown in the animation as shaking velocity). The white lines show the coastline and Chile trench. Simulation was calculated on the UK Research Council's Archer high performance computing cluster. Research funded by the Natural Environment Research Council (NERC). Simula...
Listen to the Jan 2015 M3.8 Oakham earthquake
มุมมอง 9989 ปีที่แล้ว
Quake, Rattle and Roll! See how aseismic waves from a UK earthquake rattle across the country. We convert the seismogram signals (from the British Geological Survey's monitoring network) and convert them into audible frequencies by speeding up the records by 30 times.
Ocean bottom seismometer recovery
มุมมอง 36610 ปีที่แล้ว
Cascadia Initiative - Leg 6 - September 2014
Deploying a seismometer to the bottom of the Pacific Ocean
มุมมอง 27110 ปีที่แล้ว
Leg 6 cruise of the Cascadia Initiative to understand earthquake hazard along the Pacific Northwest coast of the Uniter States.
So did evil SUVs and their CO2 cause the Younger Dryas, end of the ice age 12,000 years ago??
Once again climate change in a place where joe blogs can't prove it wrong 😮
Really, ok, please explain exactly how has climate changed when current climate is TOTALLY within normal variation for our current interglacial, the Holocene spanning the last 8000 years.
So far, you mean? The problem is the rate of warming.
@@haven216 Nope not at all, the warming trend lines are the same as the previous multi decade warmings we have had since we came out of the little Ice Age. Nothing unusual happening there.
@@haven216 Furthermore, look at the trend line in the Reference System, THE most accurate land temperature monitoring system in the U.S since it was set up in 2005. So far that system shows NO overall warming trend since 2005.
@@peterjones4180 The planet was on a cooling trend since the holocene climatic optimum. While there were smaller increases and decreases during that time, the general trend was down right up until the industrial revolution, especially when a smoothing filter is applied. Since then, temperatures have been increasing at an increasing pace. That is an irrefutable fact. There have now been countless independent studies that confirm this trend.
@@peterjones4180 Your claim is also directly contradicted by the data gathered by USCRN itself. Since it was setup in 2005, it has been consistent with records from the national weather station network. If anything, it shows slightly more warming than the old network, about +0.5C every decade. It is also a well established fact that some places warm faster than others, especially at the poles.
Great work. And thank you for illustrating the scale of the walls of that fjord! Absolutely mind boggling size.
Hey, thanks for doing this, science communication is so valuable!
Tom Scott brought me here. Thnx Tom!
Nicely done! Thanks Tom Scott for sending me here!
Very interesting video. Thanks for making it and sharing with us.
That is rather fascinating. Thank you very much for sharing, and congratulations to all on the release of the paper.
Sure climate change triggered a landslide 200 meters above the glacier. In fact the very reason that canyon exists is due to the erosion caused by ice. I assume you are blaming cyclical ice ages for that scar on the mountain side correct? How much funding a study like this would get if it didn't blame 150ppm CO2 and who would publish it? Theoretical question.. we know the answer. Decency died with political agendas....
Global average temperatures increasing by 2 degrees within a century is most certainly not within normal cyclical ice ages.
@@haven216 It did not increase +2C and we haven't introduced the fraction of the forcing needed to increase by +2C. Mind you what is the average global temperature and how was it measured in 1924?
@@nyali2 The planet had already warmed by +1C by 2000. Current projections suggest that it will warm by another +2-3C by 2100. Is that clearer?
@@haven216 🤣 OK you are another one without a shred of knowledge in this subject. What has caused the planet to warm +1C? What will cause it to warm +2-3C? Mind you +1C in this subject is an enormous difference, so thread carefully.
@@nyali2 Why entertain that answer when I know it's not going to be the answer you're looking for? Climate science is over a century old, with countless independent studies confirming the link.
this is so cool. wish there was video of it but still really cool
Climate change hahaha
Hopefully you can connect the dots when there’s no food on the shelves
@Jc-ms5vv well it won't be because of climate change
@@moto126ktm oh but it will. Already starting to happen
Thanks very informative
Great explanation! To me it is very interesting that the wave remained in the fjord for so long - I would've expected a much faster "leakage" of the wave out of the fjord, but this is pretty far from my field of knowledge...
Merci beaucoup de vulgariser vos travaux.
Amazing. Subbed. Tell me more.
It’s amazing how smart we are to find this out, and how dumb we are to continue to doom our own civilisation because we couldn’t make some small changes 25 years ago that we all would have forgotten about if we had done them. Much easier to turn the Titanic 1° to port when you’re 100 miles away from the iceberg, then trying to turn it 90° to port when you are 100 m away from it.
How about the fact one volcanic eruption can cause more air-pollution and climate change than man. But then they can't ban the volcano, or tax it.
😂😂😂😂
Climate change is a hoax and not real. Land slides happen and they have for millions of years and will continue. In the '80s it was acid rain. In the '90sit was the ozone layer. Today it is global warming and none of it has happened to this date!
Explain the huge lost of Permafrost? U probably don't even know what Permafrost is.
Enjoy denial while it last
@@Jc-ms5vv Troll elsewhere you douche bag liberal.
What? Wait! What about eons worth of Earth's gravitational force, erosion and normal freeze and thaw cycles over those same eons of time before man became a thing? All the glacier did was get in the way from the rocks inevitable fall. Love all the our way or no way Science Inc. logos at the end. Nice images by the way.
Was linked to his by the Canadian CBC news. Thank you so much for all the work you and your 68 colleagues did to figure this. Thank you for sharing it with all of us.
The volcanoes
So interesting. But that piano music background was unnecessary and distracting
This video has the United Nations Climate Change disclaimer. Global warming was officially stated at 1.1°C in 1991 and 1.06°C in 2022. Global warming has been staled at about 1°C since 1992. The cause of global warming is not know 2024. In the early 1980s it was predicted if global warming was to rise to 1.5°C observable stronger hurricanes should take place in the Gulf of Mexico. Which was given the promotable term of Climate Change. That has not happened as of 2024. The Arctic region is getting warmer. It is scientifically impossible for greenhouse gas behavior to cause global warming. All the greenhouse radiant energy from the earth is completely absorbed in earth's greenhouse effect by greenhouse gases within 20 meters of the radiating surface that is always in saturation from the strong greenhouse gas water vapor. The back of the United Nation's Intergovernmental Panel on Climate Change (IPCC) science report states it took its greenhouse gas samples at 20,000 meters altitude where it is common high school level knowledge there is no greenhouse radiant energy. This is typical practice for deceptive marketing to state legal data transparency protecting the perpetrators from fraud prosecution. The IPCC has been transparent with its data acknowledging it is not dealing with active greenhouse gases. Earth's greenhouse effect is frequently used as a primary example to high school students of a system always in saturation from the strong greenhouse gas water vapor absorbing all the greenhouse radiant energy from the earth with greenhouse gases within 20 meters of the radiating surface that is all around us everyday and can't have its overall effect changed. There is no further greenhouse radiant energy to interact with greenhouse gases. At 1% average tropospheric water vapor over 99% of earth’s greenhouse effect is from water vapor. Water vapor would hold earth's greenhouse effect in saturation if it were the only greenhouse gas in the atmosphere. The overall average temperature gain to the earth from the earth’s greenhouse effect is 5.55°C (10°F). Arctic warming is taking place with the proving mechanism being warm Atlantic Ocean waters migrating deeper and more frequently into the Arctic Ocean warming it and the region. That warmer water is causing a few weeks less of reflective snow and ice coverage resulting in more solar heat gain to the Arctic region surface. Atmospheric CO2 levels of 1200 ppm about three times what they are today would greatly invigorate C3 plants the majority of plant life on earth greatly greening the planet. 0.4% of the atmosphere is CO2 and on average 1% is H20 water vapor. (1% H20)/(0.4% CO2) = 25. Water vapor is 25 times more present in the atmosphere on average than CO2. Water vapor has an CO2e of 18, 18 X 25 = 450 CO2e total for water vapor to 1 CO2e for CO2. The Earth’s oceans have 3-1/2 million sea floor volcanic vents warming the water and changing it’s chemistry that have not been systematically accounted for.
An excellent lesson here in both how and why data cherry-picking is used to deny a conclusion one doesn’t want to acknowledge. All the classic techniques are on display here. 1. Blinding them with math enumerating your counter-fact is highly effective despite failing to account for global observations you don’t like. 2. Presenting alternative causes with absolutely no data whatsoever to distract from the ones with data. 3. Comparing two wholly different mechanisms with no accounting at all for how their effect inherently differs. Fascinating post.
Excellent work! Utilizing seismology to characterize subsurface events is a game-changer. I've personally explored its application in investigating ice-rock avalanches through seismic signals, and the potential is vast. This field holds immense promise for unraveling mysteries of remote locations, as well as the Earth's and other planets' subsurface and surface dynamics. Your research underscores the significance of seismology in advancing our understanding of complex geological processes. Looking forward to more groundbreaking discoveries.
Its a good thing we are switching over to electric cars to stop climate change, now we can have deisel generators making the electricity, and more cobalt and lithium mines making those cool craters and wastelands!
It's not climate change but TMH instead.
the climate has been changing ever since it was a thing, it will always change, tomorrow a volcano could pop and a mini ice age could begin and then you would be wanting the current weather back again.
Just never at this rate
@@Jc-ms5vv how do you know it never changed this slowly?
@@williamfowler616 rapid changes in the climate is what caused mass extinctions not slow ones where species had time to adapt
@@Jc-ms5vv so fast is what has happened in the past, what is the problem with the climate changing? earth defrosting and warming up is in the future and man cannot stop it from happening
@@williamfowler616 its rapidly changing now
I've seen reports on this but what you've done is really amazing. I appreciate your work. What a fascinating event
Greenland Ice cap has only decreased by 1% in the last 30 years.
Are you complaining about the lack of progress
It's funny that it's showing Greenland as the center or top of the world where the north pole should be! More lies!!
Fascinating story and video!
Very interesting. Are the additional files also somewhere available?
@@astrophotonl hello, which additional files do you mean exactly?
@@stephenhicks9108 the supplementary texts that are mentioned. S1 to S6.
I did research in geophysics in the past and now I'm a physics teacher. I showed this to my exam classes to show the relation between physics, and what they learn, and the real life. It's a great example!
You can find our supplementary materials here: www.science.org/action/downloadSupplement?doi=10.1126%2Fscience.adm9247&file=science.adm9247_sm.pdf (let me know though if you have any problems getting this).
Climate change is natural and IF there's any man made affect, it's from government intervention NOT you and I. These seismic signals are simply triggered by the 650ft wall of water trapped in the fjord, essentially like sloshing around in a bathtub over and over.
Climate change caused that piece to break away and splash down into the water beneath it? In order a rumble to travel around the globe with a hum that went on for days, is it ridiculous to disagree? Something flew by made contact with our planet in order to have such an impact. As a explanation, the climate change theory is convenient as an answer to prevent anyone from critically thinking about the size/impact that came along with this event. Maybe a volcanic release somewhere, activity from the sun, or whatever can be used from the past to compare this with. Something is not adding up. Like the anomalies occuring in the southern ocean of the coast of South Africa. Climate change is a broad statement. When used as the cause of such an event it lacks any details one would expect after a global shock felt around the world.
Or dismissing gravity and centuries, eons even of erosion from the event. Why did they just happen to set up seismic detection equipment (3:34) in this particular fjord before this happened? Coincidence? Something to make you go... Hmm? Myself, I don't believe in coincidences but I do believe in conspiracies to make them happen. If you can question it, it is science. If you can't, it is propaganda. ~Luke Rudkoski~
When there is a pair of before and after images showing the missing mountain-side, your instant suspicion is that it would have been "something flew by made contact with our planet"? My suspicion is that the missing mountain-side fell into the fjord. Reduced permafrost might well have been the cause. Anyone living in areas where the ground freezes is well aware of this type of landslide in spring - on much smaller scales - when the ground thaws.
For those who aren't already aware the 1958 Lituya Bay, Alaska Tsunami (there's a few first hand accounts of the event which are interesting) was another great example of the intensity that can occur when these Landslides happen in a bay, luckily it's natural for what causes this to happen to be in remote areas but if this were to happen in a populated area or a touristic area this could cause a horrifying disaster like the world has never seen before. But this reminded me of that and I wanted to share cause i saw some comments shocked at the size and effect.
Does anyone know what exactly is meant by the "destroyed cultural and archaeological heritage sites across the fjord system" mentioned in the GEUS article?
Good question, Thule Culture Inuit archaeological sites and 20th-century trapper huts were destroyed by the tsunami which meant that no such event had occurred in at least 200 years.
Used to be an earthquake was caused by plates, underground shifting. Now they’re telling us it was caused by climate change. These same climate change fanatics claim that the ocean was going to raise up and swallow the coast lines about 20 years ago, but it never happened so much for their credibility I agree there certainly is climate change going on, but I had learned many many years ago that claim it change is an ongoing process on planet earth. it happened long before the automobile was invented long before mankind started dumping empty plastic water bottles in the ocean, the size of Texas. Don’t confuse pollution with climate change
That is one of the most beautiful scientific animations I have ever seen.
Thanks so much for your lovely comment - it means a lot :)
Very interesting study and once again a reminder of the significance of science and the human impact on our environment.
Many thanks for your nice comment and your interest - much appreciated.
Excellent presentation.
Many thanks for your nice comment and your interest - much appreciated.
Amazing report! And a shocking realization about climate change...😔
Many thanks for your nice comment and your interest - much appreciated.
But how can sloshing water generate a seismic signal? Afterall, it's just water..? What am I missing?
'Just water'? I dare you to slap a surface of water with your hand as HARD as possible, without saying ouch!
Have you ever heard of a seismic signal being generated by a wave? Seiche in a fjord, even if 7m high, is still a wave (made of sea water). Actually, the world has seen much bigger waves hitting shores due to hurricanes, etc.
Read the paper
Many thanks for your comment. So the water's centre of gravity keeps moving back and forth, essentially crashing against the fjord walls, which transfers momentum, generating seismic energy through the Earth's crust. We also see seismic signals (as a form of noise) due to approaching hurricanes and storms.
@@stephenhicks9108 This for this clarification, which is very useful. So, seiche is really not a 'wave' in the usual sense, but the entire water in the fjord actually moves back and forth. Due to friction with the fjord walls, some momentum gets transferred with each bounce, which manifests itself as a detectable sesmic signal. Did I get it?
200 m 😂😂😂😂
I found the link in Mastodon. Thanks for the great work analyzing what happened and for the excellent video.
Many thanks for your nice comment.
This is the sort of science video that shows TH-cam at its best. Thanks very much!
Thanks so much - this is great to hear - and all my efforts in making the video have paid off :)
An interesting question given the novel nature of this signal. What effect does a *continuous* mulit-day hum of crust vibrations have on fault zones? and kudos to the calling the 200m runup a 'splash' and not just a tsunami. Very different wave types.
That was exactly my question, which remains unanswered. I would be surprised if it had no correlation at all with other seismic events during that time.
Many thanks for your question. Once the seismic waves leave Greenland, the ground vibrations are very minor (< micrometers displacement) and are so long in oscillation period that they are unlikely to dynamically affect any stress changes along faults. We didn't observe any increase in global seismic activity after this event.
Fault zones are continuously being stressed by the sun and the moon. There are "tides" on land as well as in the sea!
Grande balela
Congratulations, your views went up from 100 to 100.000. 😀 Thanks to major media linking to this.
Thanks for your comment and interest.
21st century and you only have a computer recreation??? No image or video? It is not entirely credible
No one was in the fjord (fortunately) to witness the tsunami. It is very remote and uninhabited - please see our other video for dramatic before/after images and drone footage though: th-cam.com/video/60T9TKuuujs/w-d-xo.html