Science & Engineering

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Kismet
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Re: Science & Engineering

Post by Kismet »

https://www.scientificamerican.com/arti ... -for-nine/

"An ‘Unidentified Seismic Object’ Shook Earth for Nine Days—Now We Know What It Was

Scientists have traced a baffling monotonous planetary hum that lasted for nine days back to a glacier in Greenland
Earthquake scientists detected an unusual signal on monitoring stations used to detect seismic activity during September 2023. We saw it on sensors everywhere, from the Arctic to Antarctica.

We were baffled – the signal was unlike any previously recorded. Instead of the frequency-rich rumble typical of earthquakes, this was a monotonous hum, containing only a single vibration frequency. Even more puzzling was that the signal kept going for nine days.

Initially classified as a “USO” – an unidentified seismic object – the source of the signal was eventually traced back to a massive landslide in Greenland’s remote Dickson Fjord. A staggering volume of rock and ice, enough to fill 10,000 Olympic-sized swimming pools, plunged into the fjord, triggering a 200-metre-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.

To put the tsunami in context, that 200-metre wave was double the height of the tower that houses Big Ben in London and many times higher than anything recorded after massive undersea earthquakes in Indonesia in 2004 (the Boxing Day tsunami) or Japan in 2011 (the tsunami which hit Fukushima nuclear plant). It was perhaps the tallest wave anywhere on Earth since 1980.
Our discovery, now published in the journal Science, relied on collaboration with 66 other scientists from 40 institutions across 15 countries. Much like an air crash investigation, solving this mystery required putting many diverse pieces of evidence together, from a treasure trove of seismic data, to satellite imagery, in-fjord water level monitors, and detailed simulations of how the tsunami wave evolved.

This all highlighted a catastrophic, cascading chain of events, from decades to seconds before the collapse. The landslide travelled down a very steep glacier in a narrow gully before plunging into a narrow, confined fjord. Ultimately though it was decades of global heating that had thinned the glacier by several tens of meters, meaning that the mountain towering above it could no longer be held up.
Uncharted waters

But beyond the weirdness of this scientific marvel, this event underscores a deeper and more unsettling truth: climate change is reshaping our planet and our scientific methods in ways we are only beginning to understand.
t is a stark reminder that we are navigating uncharted waters. Just a year ago, the idea that a seiche could persist for nine days would have been dismissed as absurd. Similarly, a century ago, the notion that warming could destabilise slopes in the Arctic, leading to massive landslides and tsunamis happening almost yearly, would have been considered far-fetched. Yet, these once-unthinkable events are now becoming our new reality.

As we move deeper into this new era, we can expect to witness more phenomena that defy our previous understanding, simply because our experience does not encompass the extreme conditions we are now encountering. We found a nine-day wave that previously no one could imagine could exist.

Traditionally, discussions about climate change have focused on us looking upwards and outwards to the atmosphere and to the oceans with shifting weather patterns, and rising sea levels. But Dickson Fjord forces us to look downward, to the very crust beneath our feet.

For perhaps the first time, climate change has triggered a seismic event with global implications. The landslide in Greenland sent vibrations through the Earth, shaking the planet and generating seismic waves that travelled all around the globe, within an hour of the event. No piece of ground beneath our feet was immune to these vibrations, metaphorically opening up fissures in our understanding of these events.
This will happen again

Although landslide-tsunamis have been recorded before, the one in September 2023 was the first ever seen in east Greenland, an area that had appeared immune to these catastrophic climate change induced events.

This certainly won’t be the last such landslide-megatsunami. As permafrost on steep slopes continues to warm and glaciers continue to thin we can expect these events to happen more often and on an even bigger scale across the world’s polar and mountainous regions. Recently identified unstable slopes in west Greenland and in Alaska are clear examples of looming disasters.

As we confront these extreme and unexpected events, it is becoming clear that our existing scientific methods and toolkits may need to be fully equipped to deal with them. We had no standard workflow to analyse 2023 Greenland event. We also must adopt a new mindset because our current understanding is shaped by a now near-extinct, previously stable climate.

As we continue to alter our planet’s climate, we must be prepared for unexpected phenomena that challenge our current understanding and demand new ways of thinking. The ground beneath us is shaking, both literally and figuratively. While the scientific community must adapt and pave the way for informed decisions, it’s up to decision-makers to act."


More fascinating stuff here

https://arstechnica.com/science/2024/09 ... greenland/
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Kismet
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Re: Science & Engineering

Post by Kismet »

Next time folks here want to beef about scientists read this story

https://www.nytimes.com/2024/09/17/scie ... ation.html

"A $5 Billion NASA Mission Looked Doomed. Could Engineers Save It?

Weeks before Europa Clipper was to be shipped for launch, scientists discovered a potentially fatal flaw that might endanger the spacecraft’s ability to study an ocean moon of Jupiter.

It would be like a canary in a coal mine. While Europa Clipper was at Jupiter, if a certain type of MOSFET weakened or failed in the box, the team would know to anneal that type of transistor throughout the spacecraft, or employ another strategy to keep the mission working.

“It was one of those that’s so-crazy-it-might-work moments,” Mr. Stehly said.

They called it the canary box.

But Mr. Srinivasan’s team would have to build it in weeks instead of years, write its software and then integrate it all with the spacecraft, which had already been shipped to Kennedy Space Center in Florida."


The mission to Europa will now go on as planned - the "fix" is in!
Carroll81
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Re: Science & Engineering

Post by Carroll81 »

Kismet wrote: Tue Sep 17, 2024 2:43 pm Next time folks here want to beef about scientists read this story

https://www.nytimes.com/2024/09/17/scie ... ation.html

"A $5 Billion NASA Mission Looked Doomed. Could Engineers Save It?

Weeks before Europa Clipper was to be shipped for launch, scientists discovered a potentially fatal flaw that might endanger the spacecraft’s ability to study an ocean moon of Jupiter.

It would be like a canary in a coal mine. While Europa Clipper was at Jupiter, if a certain type of MOSFET weakened or failed in the box, the team would know to anneal that type of transistor throughout the spacecraft, or employ another strategy to keep the mission working.

“It was one of those that’s so-crazy-it-might-work moments,” Mr. Stehly said.

They called it the canary box.

But Mr. Srinivasan’s team would have to build it in weeks instead of years, write its software and then integrate it all with the spacecraft, which had already been shipped to Kennedy Space Center in Florida."


The mission to Europa will now go on as planned - the "fix" is in!

It is an interesting story on how they engineered the current solution. But, this has Challenger disaster written all over it. Maybe I am jaded because I just happened to read Feynmans appendix to the Challenger report recently. The launch may go on as planned, but that does not mean the mission will be successful. If the "Canary" is being carried by the system it is supposed to protect, isn't it too late to protect the system? What am I missing?
Typical Lax Dad
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Re: Science & Engineering

Post by Typical Lax Dad »

“I wish you would!”
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youthathletics
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Re: Science & Engineering

Post by youthathletics »

So all those crystal shops and places like Sedona, AZ are right.....the power of crystals is real.
A fraudulent intent, however carefully concealed at the outset, will generally, in the end, betray itself.
~Livy


“There are two ways to be fooled. One is to believe what isn’t true; the other is to refuse to believe what is true.” -Soren Kierkegaard
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Kismet
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Re: Science & Engineering

Post by Kismet »

I'm not a fan of Joe Rogan but I found this piece he recently did with Luis Elizondo about UAPs fascinating - it will require some time as it is 2+ hours - I have always been skeptical on this topic but Elizondo seems rational and legitimate to me. Parts of this conversation are riveting.



How am I doing Tech? :lol: :lol: :lol:
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youthathletics
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Re: Science & Engineering

Post by youthathletics »

:D Be careful, Kismet, you may start seeing and understanding things a bit more differently. ;)
A fraudulent intent, however carefully concealed at the outset, will generally, in the end, betray itself.
~Livy


“There are two ways to be fooled. One is to believe what isn’t true; the other is to refuse to believe what is true.” -Soren Kierkegaard
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Kismet
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Re: Science & Engineering

Post by Kismet »

youthathletics wrote: Tue Oct 01, 2024 8:14 pm :D Be careful, Kismet, you may start seeing and understanding things a bit more differently. ;)
Thx. It's not a trend for me - more of a one off. ;)
Elizondo is much more credible than Rogan IMHO. May try his book IMMINENT.

I will also say that Rogan does put in the time on this - this convo with Elizondo was 2+ hours. You won't get nearly anything like that from most other media sources.
tech37
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Re: Science & Engineering

Post by tech37 »

Kismet wrote: Tue Oct 01, 2024 10:11 am I'm not a fan of Joe Rogan but I found this piece he recently did with Luis Elizondo about UAPs fascinating - it will require some time as it is 2+ hours - I have always been skeptical on this topic but Elizondo seems rational and legitimate to me. Parts of this conversation are riveting.



How am I doing Tech? :lol: :lol: :lol:
Ha! Too funny... kismet now watching Rogan.

Thanks for this, I hadn't seen this interview. When convenient, I'll tune in.

As I've stated many times (only to be mocked on this board, including by you), watching Rogan podcast is only as interesting/relevant as his guest(s) are. IMHO perhaps a third to half of it is boring to unwatchable.
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