Lituya Bay has been the site of frequent large volume landslides and tsunamis during the last 1,000 years. What makes this hazard most worrying is how similar other sections of the Alaskan coastline look to this bay, meaning that a similar landslide + tsunami could also occur there.
Once again I must send my compliments to you for providing such educational videos. I am always impressed by your topics and the way you explain it. Love your channel. 💕
Let's not forgot that the last time a mega tsunami hit the planet was...in October 17, 2015 in Alaska...and it made absolutely no news anywhere even though it was the 4th largest ever recorded on earth. Correction: Another one hit Greenland in 2017, admittedly that was 6th largest, still interior to the 2015 disaster.
Wow! Thanks for paying attention and relating this information. Very nice of you and caring! As some of us with inquiring minds do need to know. Blessings!
Glad you covered this amazing Lituya Bay event, and we can thank geologist Don Miller for his early investigations and images. His original 1960 paper is linked in one of your citations: Don J. Miller (1960), "Giant Waves at Lituya Bay, Alaska"
@@tryscience Yes, they were bad. And the book about the disaster made it feel unnerving. Plus, the entrance to the bay through the sand spits is dodgy. There are a few wrecks there.
It's always the most picturesque places on this planet that have a hidden monster behind it. As a child I always thought the Yellowstone area was one of the most beautiful mountain areas in the U.S. until I found out it was the worlds largest super volcano. The most pristine beaches on this planet are formed by the most violent storms...etc..
It's a great disaster movie scenario but Yellowstone is not going off anytime soon. Most of its magma is not liquid enough or under enough trapped pressure to provide the right conditions. That's my completely amateur understanding anyway.
The Altiplano-Puna volcanic complex actually produced many massive explosive eruptions, with 3 being VEI 8. The most notable of these is La Pacana. Please search on it.
While the tsunami in Valdez didn’t quite reach the height of a mega-tsunami, the 1964 Good Friday earthquake generated a tsunami in Valdez, AK that reached heights of up to 50 meters, and ranged for more than 3 KM inland. It killed several hundred people, and almost completely destroyed the town. In fact it was so bad, and due to the shape of the fjord Valdez is built in, the town ended up being moved almost 5 miles around the side of the fjord to a safer location where adjacent valleys, and several intervening outcroppings of rock can shield it from a direct hit from a tsunami. It was caused by an enormous section of the sun-ocean continental shelf breaking off and collapsing during the earthquake which resulted in the water effectively being sucked out of the fjord at first, then rushing back in.
Wow never heard of this before, I can't even imagine the scale of such a wave. Kind of makes me hope another one happens soon and someone can get it on video (so long as no one gets hurt lol).
Wow what an amazing video. My only complaint is that it wasn't longer. But you bet I'm gonna binge watch as many of these as I can now. Also if you haven't already done one, I'd love to see a video about the geological history of the Great Lakes and/or the Niagara Escarpment, which the Niagara Falls go over. As I understand it, the area around the tip of the Bruce Peninsula near Tobermory in Ontario also has some of the oldest rocks in the world. That might make an interesting video as well.
The actual wave wasn't that tall, it was just the initial splash/runup. The actual wave was around 300 feet tall and was only about 50 feet when it hit the boats near the mouth of the bay.
Could you do a video about the massive land slide that formed the eastern side of the island of Oahu in Hawaii? I hear it may have been one of the largest land slides ever on the planet.
YES!!! The Nuuanu Slide! My all time favorite geological event and an incredibly obscure and elusive one, despite it being THE largest known landslide in history. Pieces like the Tuscaloosa Seamount, the size of Manhattan island, rolled as far as 200km away across the ocean floor!! That absolutely boggles the mind. The best part is you can easily see all of it still lying on the sea floor today from a Google satellite map, it looks similar to the way wet snow scatters after kicking a snowbank.. It was 1.5My ago. A similar event occurred forming the north face of Molokai too, it’s debris path actually intersects the Oahu one. It’s the reason why Molokai’s north face has the world’s steepest sheer cliffs at 1700’! HISTORY Channel’s absolutely spectacular full length video on the Hawai’ian Islands in their series “How the Earth Was Made” is available on their UA-cam page and it spends maybe 3-4 minutes covering this.
WOW!! The force of that landslide was amazing! And just think how comparatively common landslides are vs. tsunami producing earthquakes. Thanks for your informative video. In 1964, I lived near Crescent City, CA (20 miles from Oregon border). We woke up on Saturday to hear news of the Good Friday earthquake in Alaska and the resultant tsunami which struck the west coast -especially CC. The Crescent City harbor had a jetty to shelter the harbor on the shallow crescent shaped bay. In 1955, CC was the first port in the western hemisphere to use tetrapods to reinforce its jetty. One of the 25-ton reinforced concrete tetrapods was put display on a concrete base near the harbor shoreline. The tsunami generated by the 1964 earthquake in Alaska was sufficient to move this tetrapod a few feet on its base. Because the tetrapods were eventually being broken apart by the power of the ocean, the jetty was further reinforced in 1974 with 42-ton reinforced concrete dolos. There is one on display near the displayed tetrapod.
The graphics used to explain the process of this rockfall and resulting tsunami are excellent. I'd heard of this landslide/tsunami, but I didn't know about the fracturing of the ground under the rockfall and the subsequent slide of the glacial sediment into the bay. Yep, it would definitely be best to skip any boating on this bay! Thanks for another excellent video.
My younger brother and I were at a summer camp outside of Juneau that evening in 1958. He was 11 and I was 13. In the girl's tent, we thought the boys were outside shaking the tent which was on a wooden platform, but after we heard nobody outside, we unzipped the door and looked out. The 200+ foot tall hemlock and spruce were whipping in the air like wheat in the wind. We thought it was cool. My mother back in Sitka said the furniture bounced across the room. Meanwhile, a Sitka fisherman and his son were bedding down for the evening in Lituya Bay in their fishing boat. They managed to get the anchor up and were carried along with the wave. Howard, the father, said they could look down into the water and see the tops of trees that grew on an island in the bay. The unfortunate people camping on that island were not so lucky. We are used to being shaken up now and then, but sometimes these quakes are deadly. The saving grace was that this one was in an isolated location. Not so much so during the Good Friday quake that hit Southcentral Alaska in 1964. Because there are not too many good bays for boats along that part of the Gulf of Alaska, boats still do use it to pull into during a storm. Your odds are better for a small fishing boat in the bay than in the open water of the gulf.
Whoah amazing video, extremely well explained, super easy to understand. Thank you, I can't imagine the time it must've taken to put this together. Cheers!
A very good description with details that are sometimes missed out of other tellings of then event (e.g. other tsunamis that occurred at this location).
I only recently heard about this incredible event, and of the boaters that were in the bay at that time and whom encountered that wave! Soley due to the remoteness of where this took place, and the absence of people, the injuries and damage was very limited.
Could you do a video on the 2011 Virginia Earthquake? This is one of two earthquakes I've ever felt (the other being a lower-magnitude earthquake in Delaware) and the only one I've ever felt strongly. My family was at the beach in NJ at the time. I was playing in some sand right along the shore and when the shaking started I thought it was just heat-related confusion since I had never felt an earthquake before. My family members sitting on our beach chairs got rocked back and forth a bunch but the ones swimming or wading in the ocean at the time felt nothing. I'd love to see a video on this earthquake and the east coast's geology that let me feel a magnitude 6 earthquake so strongly nearly 200 miles from the epicenter.
Look at channel “Deep Dives” they did a 30 min video something like “Why East Coast Earthquakes Are The Most Devastating”, along those lines. Search “deep dive east coast earthquakes”
What's really crazy is another earthquake that was also felt in the NY/NJ area. But it was not from 200 miles away in Virginia... but rather nearly 900 miles away in Missouri and Arkansas. If/when NMSZ goes again, Memphis and St. Louis are in serious trouble.
If memory serves me right, I believe a father and son were fishing somewhere in those waters. Can you imagine, “hey dad, what the heck is that?”AAAAAAAAAH!!! I also believe they survived.
Is one of these (perhaps the second one mentioned that occurred in another bay) the tsunami that caused a small boat with a father and son on it to be lifted and pushed above the tree line? I’ve seen an interview with the man who was the boy with his dad back then, and it is an amazing story!
No the the wave was not 524m. it sloshed up the opposing sides of the canyon 524m. The wave as it crosses from one side to the other is much much much shorter. The wave and the slosh height are different
It's called the runup height, and it's the result of waves stacking on top of one another, much the way mountains do. Mt. Everest has its roots at over 10,000 feet, yet you wouldn't claim the peak is not actually 29,000 feet high. Also, a slosh wave is a seich, not a tsunami.
On the east coast of the U.K. we nave a stretch of water known as the Dogger Bank which is well known to fishing boats but by all accounts this was a piece of land the size of a lot of countries they named Dogger Land and this was wiped out a few thousand years ago by a sunami
I thought the definition of "megatsunami" was the landslide mechanism, to separate it from a tsunami caused by a megathrust earthquake. I've also heard it used to refer to impact and volcanic explosion tsunamis too, so I don't know.
Also note that there is a recent paper about the 2020 Elliot Lake landslide and tsunami with a 100m runup. DOI:10.1029/2021GL096716 "The 28 November 2020 Landslide, Tsunami, and Outburst Flood - A Hazard Cascade Associated With Rapid Deglaciation at Elliot Creek, British Columbia, Canada"
Lake Tahoe experienced a very large t sf unsmi when there was a major landslide. Some of the biggest Megatsuasmis of recent geologic times probably occurred when flank collapses occured in the Hawaiian Islands. A flank collapse of the island of Hawaii is perhaps the largest probable natural disaster looming in the future outside of an impact event. When Oahu suffered a flank collapse a large enough piece came off of the island that it was initially thought to be a seamount.
My wife and I camped on Cenotaph Island in 1994 after rafting the Tat river. The entrance to the bay was terrifying, the tree line was shocking and that night both me and my wife had dreams warning us to "get out while you still can". On the island is a plaque placed by the Harvard Mountaineering Club thanking a local trapper for his help when they climbed Mt Fairweather. The real cenotaph was left by the La Perouse expedition in honor of the 21 sailors lost when surveying the entrance channel. It is that dangerous.
Next video idea: I got to visit Pompeii when I was in high school many years ago. I was always interested in why some people were not able to escape and perished. What are your thoughts on how many people escaped and how many met their end? Were there warnings? Can we learn from this? Love the channel!!
The story on that is actually pretty mundane. Long story short, the people with means fled as there were tremors and earthquakes that made people leave 2-4 days prior to the volcano erupting. Themost people who died were poor people and slaves and other people too stubborn to leave or did not have the means to leave.
I think another aspect of Pompei was that the people were used to there being some volcanic activity such as ash and tremors. This caused a lot of complacency in the population as a whole. Those that left early were indeed wealthy but many of those left not from fear but more from the inconvenience the ash, the tremors, etc were causing to their daily lives.
@@Isabella-nh5dm All n all, 2k deaths out of 20k people living isn't too shabby for a evacuation in all honesty for the time. Roman civics weren't too shabby even by today standards. I've seen worse in the modern day.
Several fishing boats were in the bay when this tsunami happened. The wave lifted the boats over the spit of land at the entrance and deposited them out into the deeper water. The guys on the boats survived.
“I would not recommend visiting the area” sounds like staying away from most of the AK coast. That’s a little bit like keeping away from all trees because a branch could fall and hit your head. There are risks in staying in your home too.
Great info for someone in the high remote Himalayas on the most what's called 'the most dangerous road in the world.' The entire Himalayan regions could go like this - anytime!!!
Request: When you look at a satellite map of eastern USA, there is a distinct striped pattern running northeast - southwest from perhaps Pennsylvania to North Carolina, and I’ve even observed it and photographed it from an airliner, but I’ve never heard anybody describe what it is. I’m really shocked because it seems like such an obvious geological phenomenon and I’ve learned a million other things and yet never once heard any reference to this.
Excuse my ignorance if this is not related - but is it the "fall line"? I just heard about this the other day and can't believe I didn't know of it earlier.
Can vouch for the erosion in the Tweed Valley. Very obvious after at least two big "rain events" this year, where to my mind the first hugely softened the riverbanks and thus the second was able to sweep tall gum trees and lots of mud and soil down the river. Drove up that valley last week and the landscape was very different from just a few months ago. A series of muddy, round lagoon type areas have formed next to the river, where I guess large volumes of water and debris ate away at the banks and scoured them hard with tall trees crashing and sweeping along the narrow valley. Along the valley's top 50km or so, there were at least four temporary traffic lights, where the road has collapsed into the river, cutting the road to one lane. Elsewhere, entire road sections just disintegrated so you drive over 100m or so of rubble and no tar paving is left at all due to water that flowed over it during the deluges. We seem to be in a long-lasting La Niña phase that has now spanned two or three years. There's a 2km or so elevated section along the very top of the valley, a bit away from the river, where you can see right along and past the ancient volcano core, the distinctive Wollumbin (Mt Warning). Parts of the road there have just slipped down the escarpment. So even though it's a very old and very dead volcano, it's still a dynamic landscape with geologic forces and changes literally visible over the course of a few months!
Enjoy expanding my horizons with this channel. You're keeping me interested. SUGGESTION: What's new in the Marianas Trech. Anything like plate tectonics or uplift, emerging underwater fumerals and the like. ☺️
That's what took Japan by surprise aswell in 2011. They expected a high tsunami after the 9 earthquake. But in several places it was much higher due to underwater landslides. They only found out later, too late.
One never knows when theyre last breath will be. In high school alone we lost over a dozen friends to various causes. Most were alcohol related. NOW is the time for salvation because tomorrow could never come.
Could you you do a thing on the Big Lava Field, NE of Carson WA? There's cool ice caves and lakes that drain in the spring and such and, who knows, maybe DB Cooper is there.
I read that a rock sheet is expected to break loose in the Azores. If it slowly slides into the sea, no big deal. But if it slides down all at once, then a possible tsunami over 1000ft could hit New York City!
could you do a video on man made earthquakes: geothermal water extraction, gas/oil extraction/damming of rivers/etc... there must be hundreds of them. I live in an area where gas extraction has caused frequent earthquakes.
So many docos on this and other potential mega tsunamis caused by faults and volcanic eruptions leading to land slips including Canary Is, Krakatoa etc. Makes me wonder what the largest wave by a meteorite could be if it caused the displacement of land masses or the continental shelf. Guess it depends on the size of the meteorite, it's speed and angle of impact. Skies the limit, scary thought.
Dear sir, Do you think we now have enough information about the earth's landscape/geology to be able to come up with a plan to help migrate people towards safe ground that can also be self-sustaining either for that region or for trade?
Any update on South Western Iceland? There was indications a rift would open up near a town and geothermal power plant a few weeks/months back... Have things calmed down? Still a tense wait? More earthquakes indicating location or when it might erupt? How are preparations to evacuate and or redirect the lava flow going or have such preparations ceased?
Topic: what if the place where is Mexico City was a Volcanic Caldera that with time turns into a lake and turns into a city? Or it was just a valley in between some mountains and volcanoes 🌋?
Lituya Bay has been the site of frequent large volume landslides and tsunamis during the last 1,000 years. What makes this hazard most worrying is how similar other sections of the Alaskan coastline look to this bay, meaning that a similar landslide + tsunami could also occur there.
Wasn't there a guy who road that Tsunami out in a canoe?
if it's unstable enough all it would take would be a small Tremor to trigger one.
@lazarman121 no it’s was a very large fishing boat.
As an Alaskan that is a scary thought
Once again I must send my compliments to you for providing such educational videos. I am always impressed by your topics and the way you explain it. Love your channel. 💕
Let's not forgot that the last time a mega tsunami hit the planet was...in October 17, 2015 in Alaska...and it made absolutely no news anywhere even though it was the 4th largest ever recorded on earth.
Correction: Another one hit Greenland in 2017, admittedly that was 6th largest, still interior to the 2015 disaster.
I looked it up. 193m!
Wow! Thanks for paying attention and relating this information. Very nice of you and caring! As some of us with inquiring minds do need to know. Blessings!
I would love to see a video on this event.
Glad you covered this amazing Lituya Bay event, and we can thank geologist Don Miller for his early investigations and images. His original 1960 paper is linked in one of your citations: Don J. Miller (1960), "Giant Waves at Lituya Bay, Alaska"
We anchored in that bay in 1998. The captain handed me a book about the disaster. Beautiful place, but not somewhere you'd want to be all the time.
Why not, mosquitoes?
@@tryscience Yes, they were bad. And the book about the disaster made it feel unnerving. Plus, the entrance to the bay through the sand spits is dodgy. There are a few wrecks there.
@@JustinQuilling sounds like an interesting experience just the same. I appreciate your reply.
Hazards like what happened in the Alaskan fjord also can happen in Norway. In fact any where fjords exist.
They're so beautiful though. There's always a catch with the beauty of mother nature.
Can they happen in a chjevy?
Or just fjords?
One of my favorite geology stories. That mountain getting scalped is insane!!!
When you can meaningfully measure volume in cubic kilometers you know you're dealing with something scary!
a wall of water carrying crush depth pressures inside it
It's always the most picturesque places on this planet that have a hidden monster behind it. As a child I always thought the Yellowstone area was one of the most beautiful mountain areas in the U.S. until I found out it was the worlds largest super volcano. The most pristine beaches on this planet are formed by the most violent storms...etc..
Same can be said of Oregon's Crater Lake, phenomenal landscape especially late at night and yet it's still an active volcano.
Yellowstone is not the largest supervolcano, there's at least 3 or 4 above it, and that's a lot since supervolcanos are very rare.
@@sjwarialaw8155 Altiplano puna magma complex would be considered the largest right?
It's a great disaster movie scenario but Yellowstone is not going off anytime soon. Most of its magma is not liquid enough or under enough trapped pressure to provide the right conditions.
That's my completely amateur understanding anyway.
The Altiplano-Puna volcanic complex actually produced many massive explosive eruptions, with 3 being VEI 8. The most notable of these is La Pacana. Please search on it.
While the tsunami in Valdez didn’t quite reach the height of a mega-tsunami, the 1964 Good Friday earthquake generated a tsunami in Valdez, AK that reached heights of up to 50 meters, and ranged for more than 3 KM inland. It killed several hundred people, and almost completely destroyed the town. In fact it was so bad, and due to the shape of the fjord Valdez is built in, the town ended up being moved almost 5 miles around the side of the fjord to a safer location where adjacent valleys, and several intervening outcroppings of rock can shield it from a direct hit from a tsunami. It was caused by an enormous section of the sun-ocean continental shelf breaking off and collapsing during the earthquake which resulted in the water effectively being sucked out of the fjord at first, then rushing back in.
There's video of that happening off Anchorage during the 1964 earthquake, taken by a sailor on board a ship that was pulled toward the sinking water.
Wow never heard of this before, I can't even imagine the scale of such a wave. Kind of makes me hope another one happens soon and someone can get it on video (so long as no one gets hurt lol).
Wow what an amazing video. My only complaint is that it wasn't longer. But you bet I'm gonna binge watch as many of these as I can now. Also if you haven't already done one, I'd love to see a video about the geological history of the Great Lakes and/or the Niagara Escarpment, which the Niagara Falls go over. As I understand it, the area around the tip of the Bruce Peninsula near Tobermory in Ontario also has some of the oldest rocks in the world. That might make an interesting video as well.
On a clear day flying from Seattle to Anchorage you can spot this bay if you know where to look.
I’ve heard about this mega-tsunami before, but I’ve never heard such a clear explanation for it until now. Thanks for making this video!
I've seen a video on this before, but wow does this video really show it well! You do a great job with the drawings
The actual wave wasn't that tall, it was just the initial splash/runup. The actual wave was around 300 feet tall and was only about 50 feet when it hit the boats near the mouth of the bay.
That still had to have sucked...but at the same time been awesome
Story time! I had a random video recommended to me about The Lituya Bay tsunami. A recommended video on that one led me to your channel haha
Thank you for this video. I've read about this event before but your visuals really helped to illustrate how the event played out.
Thanks for this talk on Lituya Bay. I first read about this inlet tsunami in the 80's and found it very interesting.
Could you do a video about the massive land slide that formed the eastern side of the island of Oahu in Hawaii? I hear it may have been one of the largest land slides ever on the planet.
YES!!! The Nuuanu Slide! My all time favorite geological event and an incredibly obscure and elusive one, despite it being THE largest known landslide in history. Pieces like the Tuscaloosa Seamount, the size of Manhattan island, rolled as far as 200km away across the ocean floor!! That absolutely boggles the mind. The best part is you can easily see all of it still lying on the sea floor today from a Google satellite map, it looks similar to the way wet snow scatters after kicking a snowbank.. It was 1.5My ago. A similar event occurred forming the north face of Molokai too, it’s debris path actually intersects the Oahu one. It’s the reason why Molokai’s north face has the world’s steepest sheer cliffs at 1700’!
HISTORY Channel’s absolutely spectacular full length video on the Hawai’ian Islands in their series “How the Earth Was Made” is available on their UA-cam page and it spends maybe 3-4 minutes covering this.
What about the Hilina Slump! That’s ready to go at anytime. ❤️🙏❤️
WOW!! The force of that landslide was amazing! And just think how comparatively common landslides are vs. tsunami producing earthquakes.
Thanks for your informative video.
In 1964, I lived near Crescent City, CA (20 miles from Oregon border). We woke up on Saturday to hear news of the Good Friday earthquake in Alaska and the resultant tsunami which struck the west coast -especially CC.
The Crescent City harbor had a jetty to shelter the harbor on the shallow crescent shaped bay. In 1955, CC was the first port in the western hemisphere to use tetrapods to reinforce its jetty. One of the 25-ton reinforced concrete tetrapods was put display on a concrete base near the harbor shoreline. The tsunami generated by the 1964 earthquake in Alaska was sufficient to move this tetrapod a few feet on its base.
Because the tetrapods were eventually being broken apart by the power of the ocean, the jetty was further reinforced in 1974 with 42-ton reinforced concrete dolos. There is one on display near the displayed tetrapod.
The graphics used to explain the process of this rockfall and resulting tsunami are excellent. I'd heard of this landslide/tsunami, but I didn't know about the fracturing of the ground under the rockfall and the subsequent slide of the glacial sediment into the bay. Yep, it would definitely be best to skip any boating on this bay! Thanks for another excellent video.
My younger brother and I were at a summer camp outside of Juneau that evening in 1958. He was 11 and I was 13. In the girl's tent, we thought the boys were outside shaking the tent which was on a wooden platform, but after we heard nobody outside, we unzipped the door and looked out. The 200+ foot tall hemlock and spruce were whipping in the air like wheat in the wind. We thought it was cool.
My mother back in Sitka said the furniture bounced across the room. Meanwhile, a Sitka fisherman and his son were bedding down for the evening in Lituya Bay in their fishing boat. They managed to get the anchor up and were carried along with the wave. Howard, the father, said they could look down into the water and see the tops of trees that grew on an island in the bay. The unfortunate people camping on that island were not so lucky.
We are used to being shaken up now and then, but sometimes these quakes are deadly. The saving grace was that this one was in an isolated location. Not so much so during the Good Friday quake that hit Southcentral Alaska in 1964.
Because there are not too many good bays for boats along that part of the Gulf of Alaska, boats still do use it to pull into during a storm. Your odds are better for a small fishing boat in the bay than in the open water of the gulf.
Great information !
Can you talk about the potential for the same to occur near Prince Rupert BC and Kitimat
Whoah amazing video, extremely well explained, super easy to understand. Thank you, I can't imagine the time it must've taken to put this together. Cheers!
do you think you could do more videos on really ancient asteroid craters? like billion+ years old
A very good description with details that are sometimes missed out of other tellings of then event (e.g. other tsunamis that occurred at this location).
Fascinating report. Thank you. I enjoyed learning about this area in Alaska.
That was beautiful. Would you consider doing more videos like these?
I only recently heard about this incredible event, and of the boaters that were in the bay at that time and whom encountered that wave!
Soley due to the remoteness of where this took place, and the absence of people, the injuries and damage was very limited.
Thank you. Very interesting.
Could you do a video on the 2011 Virginia Earthquake? This is one of two earthquakes I've ever felt (the other being a lower-magnitude earthquake in Delaware) and the only one I've ever felt strongly. My family was at the beach in NJ at the time. I was playing in some sand right along the shore and when the shaking started I thought it was just heat-related confusion since I had never felt an earthquake before. My family members sitting on our beach chairs got rocked back and forth a bunch but the ones swimming or wading in the ocean at the time felt nothing. I'd love to see a video on this earthquake and the east coast's geology that let me feel a magnitude 6 earthquake so strongly nearly 200 miles from the epicenter.
Look at channel “Deep Dives” they did a 30 min video something like “Why East Coast Earthquakes Are The Most Devastating”, along those lines. Search “deep dive east coast earthquakes”
What's really crazy is another earthquake that was also felt in the NY/NJ area. But it was not from 200 miles away in Virginia... but rather nearly 900 miles away in Missouri and Arkansas. If/when NMSZ goes again, Memphis and St. Louis are in serious trouble.
If memory serves me right, I believe a father and son were fishing somewhere in those waters. Can you imagine, “hey dad, what the heck is that?”AAAAAAAAAH!!! I also believe they survived.
Yes, indeed. They eded up fairly far out to sea but were otherwise fine.
Is one of these (perhaps the second one mentioned that occurred in another bay) the tsunami that caused a small boat with a father and son on it to be lifted and pushed above the tree line? I’ve seen an interview with the man who was the boy with his dad back then, and it is an amazing story!
No the the wave was not 524m. it sloshed up the opposing sides of the canyon 524m. The wave as it crosses from one side to the other is much much much shorter.
The wave and the slosh height are different
It's called the runup height, and it's the result of waves stacking on top of one another, much the way mountains do. Mt. Everest has its roots at over 10,000 feet, yet you wouldn't claim the peak is not actually 29,000 feet high.
Also, a slosh wave is a seich, not a tsunami.
@@AtarahDerek a seiche, tho great vocab, is not what we are talking about.
@@TheJttv Sloshing because the water got shaken = seiche
Big ripples caused by something big falling in the water = tsunami
Its roots are actually very deep in the Earth’s crust.
On the east coast of the U.K. we nave a stretch of water known as the Dogger Bank which is well known to fishing boats but by all accounts this was a piece of land the size of a lot of countries they named Dogger Land and this was wiped out a few thousand years ago by a sunami
Imagine suddenly witnessing a wave taller than the Empire State Building.
Deep Impact, anyone?
Terrifying ‼️
Sounds like a good place to surf
Did you see that there was a large landslide this week inside Rocky Mountain National Park in/near Chaos Canyon?
Great content as always! Much thanks.
I thought the definition of "megatsunami" was the landslide mechanism, to separate it from a tsunami caused by a megathrust earthquake. I've also heard it used to refer to impact and volcanic explosion tsunamis too, so I don't know.
Also note that there is a recent paper about the 2020 Elliot Lake landslide and tsunami with a 100m runup. DOI:10.1029/2021GL096716 "The 28 November 2020 Landslide, Tsunami, and Outburst Flood - A Hazard Cascade Associated With Rapid Deglaciation at Elliot Creek, British Columbia, Canada"
Lake Tahoe experienced a very large t sf unsmi when there was a major landslide. Some of the biggest Megatsuasmis of recent geologic times probably occurred when flank collapses occured in the Hawaiian Islands. A flank collapse of the island of Hawaii is perhaps the largest probable natural disaster looming in the future outside of an impact event. When Oahu suffered a flank collapse a large enough piece came off of the island that it was initially thought to be a seamount.
My wife and I camped on Cenotaph Island in 1994 after rafting the Tat river. The entrance to the bay was terrifying, the tree line was shocking and that night both me and my wife had dreams warning us to "get out while you still can". On the island is a plaque placed by the Harvard Mountaineering Club thanking a local trapper for his help when they climbed Mt Fairweather. The real cenotaph was left by the La Perouse expedition in honor of the 21 sailors lost when surveying the entrance channel. It is that dangerous.
WOW that was insanely powerful. Thanks for sharing!
Ah, the infamous Lituya bay tsunami. I would not want to be there when it was occurring !
great video
😲 FASCINATING‼️‼️‼️
I'm glad you're using metric.
Next video idea: I got to visit Pompeii when I was in high school many years ago. I was always interested in why some people were not able to escape and perished. What are your thoughts on how many people escaped and how many met their end? Were there warnings? Can we learn from this? Love the channel!!
The story on that is actually pretty mundane.
Long story short, the people with means fled as there were tremors and earthquakes that made people leave 2-4 days prior to the volcano erupting. Themost people who died were poor people and slaves and other people too stubborn to leave or did not have the means to leave.
Pompeii had become like Sodom & Gamorra. New finding are showing they were almost as decitant as America has become in the last year alone.
if you can see a volcanoe you are too close
I think another aspect of Pompei was that the people were used to there being some volcanic activity such as ash and tremors. This caused a lot of complacency in the population as a whole. Those that left early were indeed wealthy but many of those left not from fear but more from the inconvenience the ash, the tremors, etc were causing to their daily lives.
@@Isabella-nh5dm All n all, 2k deaths out of 20k people living isn't too shabby for a evacuation in all honesty for the time. Roman civics weren't too shabby even by today standards. I've seen worse in the modern day.
There is an eyewitness report of a father and son fishing the bay when it hit telling how the rode the wave over trees
Several fishing boats were in the bay when this tsunami happened. The wave lifted the boats over the spit of land at the entrance and deposited them out into the deeper water. The guys on the boats survived.
“I would not recommend visiting the area” sounds like staying away from most of the AK coast. That’s a little bit like keeping away from all trees because a branch could fall and hit your head. There are risks in staying in your home too.
That would be the scariest thing to witness... A wall of water we almost can't even comprehend existing... Yet it does...
Let's see something on Island Park Caldera. Very beautiful and in the real sense of the word Awesome.
Hello, I live in Alaska. Therefore, I have a personal interest in this video content.
Great info for someone in the high remote Himalayas on the most what's called 'the most dangerous road in the world.' The entire Himalayan regions could go like this - anytime!!!
I think a father and son rode this wave and survived.
The lines and arrows really add to the explanation.
Request: When you look at a satellite map of eastern USA, there is a distinct striped pattern running northeast - southwest from perhaps Pennsylvania to North Carolina, and I’ve even observed it and photographed it from an airliner, but I’ve never heard anybody describe what it is. I’m really shocked because it seems like such an obvious geological phenomenon and I’ve learned a million other things and yet never once heard any reference to this.
Excuse my ignorance if this is not related - but is it the "fall line"? I just heard about this the other day and can't believe I didn't know of it earlier.
Looks like a great location for a 24/7 webcam. Maybe call it Northern Lights with a bonus?
I would like to suggest a topic for a future video, the Nuuanu landslide in Oahu.
Absolutely terrifying
Educational thank you
They should install cameras overlooking the bay to see if they can catch the next one
Hi, Could you make a video about that massive eroded volcano/caldera in NSW Australia called the Tweed volcano?
Can vouch for the erosion in the Tweed Valley. Very obvious after at least two big "rain events" this year, where to my mind the first hugely softened the riverbanks and thus the second was able to sweep tall gum trees and lots of mud and soil down the river.
Drove up that valley last week and the landscape was very different from just a few months ago. A series of muddy, round lagoon type areas have formed next to the river, where I guess large volumes of water and debris ate away at the banks and scoured them hard with tall trees crashing and sweeping along the narrow valley.
Along the valley's top 50km or so, there were at least four temporary traffic lights, where the road has collapsed into the river, cutting the road to one lane. Elsewhere, entire road sections just disintegrated so you drive over 100m or so of rubble and no tar paving is left at all due to water that flowed over it during the deluges. We seem to be in a long-lasting La Niña phase that has now spanned two or three years. There's a 2km or so elevated section along the very top of the valley, a bit away from the river, where you can see right along and past the ancient volcano core, the distinctive Wollumbin (Mt Warning). Parts of the road there have just slipped down the escarpment.
So even though it's a very old and very dead volcano, it's still a dynamic landscape with geologic forces and changes literally visible over the course of a few months!
0:34 😲 to put into perspective how big this wave, just look up to Petronas Twin Towers (452m)
This is the first time I'm hearing of the earthquake.
Mentioned this to my 10 year old. He said, "Yeah Dad, that was in Lituya Bay." 👀
Enjoy expanding my horizons with this channel. You're keeping me interested. SUGGESTION: What's new in the Marianas Trech. Anything like plate tectonics or uplift, emerging underwater fumerals and the like. ☺️
That's what took Japan by surprise aswell in 2011. They expected a high tsunami after the 9 earthquake. But in several places it was much higher due to underwater landslides. They only found out later, too late.
Do they keep cameras here for scientific observation? Would be great to have footage of the next one
Would classify the 1700 height as more of a giant splash, than a wave.
Scary to know how easy the earth can shake off all life on it.
One never knows when theyre last breath will be. In high school alone we lost over a dozen friends to various causes. Most were alcohol related. NOW is the time for salvation because tomorrow could never come.
I read somewhere about a man and son who rode one of these events in a boat!
have you ever looked into storegga landslide and tsunami?
I suspect they can occur with just glacier melting itself releasing pressure on side of those mountains?
Next video please: the geologic oddity in Tucson az, the mt lemmon hoodoos
Could you you do a thing on the Big Lava Field, NE of Carson WA? There's cool ice caves and lakes that drain in the spring and such and, who knows, maybe DB Cooper is there.
Terrifying and fascinating !
200 million cubic metres of sediment ! Damn !
Speaking of landslide tsunamis, do a video on the potential Cumbre Vieja tsunami on La Palma in the Canary Islands.
You forgot to mention that 3 boats where in the fjord at the time, I think everyone survived though, could be wrong.
Trollers and longlining boats still anchor up in there from time to time
I read that a rock sheet is expected to break loose in the Azores. If it slowly slides into the sea, no big deal. But if it slides down all at once, then a possible tsunami over 1000ft could hit New York City!
Wow National Geographic did an article on the Lituya Bay Tsunami about 16 years ago maybe why is Alaska so Geologically Unstable???
I hope they set up lots of camera's around that place so we can actually see the next tsunami!
One of those situations where you sit there and like Yup this is it I'm going to die
There is a way to predict the probabilities of landslides in that area.
could you do a video on man made earthquakes: geothermal water extraction, gas/oil extraction/damming of rivers/etc... there must be hundreds of them. I live in an area where gas extraction has caused frequent earthquakes.
yes
It happens every 50-75 years so 1-50 is definitely accurate
So many docos on this and other potential mega tsunamis caused by faults and volcanic eruptions leading to land slips including Canary Is, Krakatoa etc. Makes me wonder what the largest wave by a meteorite could be if it caused the displacement of land masses or the continental shelf. Guess it depends on the size of the meteorite, it's speed and angle of impact. Skies the limit, scary thought.
Dear sir,
Do you think we now have enough information about the earth's landscape/geology to be able to come up with a plan to help migrate people towards safe ground that can also be self-sustaining either for that region or for trade?
I would love to know more about Siberia
Very scary 😨
Any update on South Western Iceland? There was indications a rift would open up near a town and geothermal power plant a few weeks/months back... Have things calmed down? Still a tense wait? More earthquakes indicating location or when it might erupt? How are preparations to evacuate and or redirect the lava flow going or have such preparations ceased?
Wow that’s something if it ever happens to where there’s a Big city that won’t be good.
I am feeling the horror of experiencing it the more I try to visualize it. And on the heels of such a big eq. Monster.
Bodhi is still searching for this wave
Topic: what if the place where is Mexico City was a Volcanic Caldera that with time turns into a lake and turns into a city? Or it was just a valley in between some mountains and volcanoes 🌋?
There is an interesting litt,le book"Tsunamis"describing this tsunami
The narrator is chewing on his tonque while speaking. 😂
you wouldnt survive the pressure if you were enveloped by that size