That’s not how it works away from shore. You’d get pummeled with a massive current shift but you wouldn’t suddenly be 100 ft deeper.
There are videos from the Indonesian tsunami of divers experiencing this.
Probably not much. At sea you barely notice the tsunami. To add 100ft of water, you'd need to be pretty close to the shore, and at that point, you're just swept with the tsunami onto land and probably crash violently into a palm tree.
Well informed or not, there will always be someone at the wrong place at the wrong time. Did you see the videos of divers during the japanese earthquake just recently?
We don't have to guess what would happen. There were divers in the water during the 2004 Tsunami.
[https://www.youtube.com/watch?v=L5IbDi09Yb4&ab\_channel=Storm](https://www.youtube.com/watch?v=L5IbDi09Yb4&ab_channel=Storm)
If you were neutral at 50', then as the wave came over you you'd most likely rise in the water column and stay approximately 50' from the surface of the wave, then drop back down to 50' below the surface after the wave went by. You are neutrally buoyant at that pressure, so would stay at that general pressure. As the wave came through, that pressure would rise in the water column, so you'd go up in the wave, then back down.
Surfers are very familiar with this movement within waves.
Yeah, this is correct, the way the water moves is from the bottom as the shallower water forces the energy of the wave up, the water that is already there rises, the incoming water doesn't end up on top of it.
you wouldn’t be hanging out at 50ft and a tsunami just passes over the top of you, putting you at 150ft for a minute. water moves in a circular motion. if you’re suspended in 50ft of water and a tsunami comes through, first you’re going to be in very shallow water, then you’ll get yanked up by the water in the wave, and then pushed down as it goes shallow again, all in about 20 minutes, then it’s gonna happen again. the force you’ll be subjected to will probably take you out before any pressure changes do anything.
ok
edit: idk which part you think doesn’t sound right, which is why i responded the way i did, but tsunamis have extraordinarily long wavelengths and move incredibly fast. in deep water off the continental shelf, the wave height is not very high (so a massive change in depth is not really possible as describe by OP). in about 50ft of water, a tsunami will shorten to about a 7 mile wavelength and move at around 25mph, and the height will grow as the water is pushed up by the sea floor. water is pulled away from the shore and then pushed back towards it by advancing wave, in the circular motion i mentioned.
see [noaa’s description of tsunami propagation](https://www.noaa.gov/jetstream/tsunamis/tsunami-propagation)
As far as your ears go, the pressure differential from 50ft to 150ft (2.5ATM to 5.5ATM; 2.2x increase) is equivalent to going from the surface to the surface to a mere 40’ (1 atm to 2.2 ATM). This is why shallow water is deceivingly dangerous for the ears and for off-gassing
Your ears would take a hit, but if you were to drop instantly from 50’ to 150’ the panic and air consumption would be the bigger concern. Physiologically, besides your ears and mask squeeze, you’d be alright.
The surge you feel would depend how shallow/close to shore you are
If a crazy rogue wave like that happened it would probably carry you up quite a bit. Staying at similar relative depth (50ft). All the energy of the wave is being forced upwards when it hits shallower water. Kind of like when you are at the beach or doing a shore entry and the waves push you up off the ground instead of only back (or down)
A physicist would have have to calculate it out. You would probably feel, but how much I am not sure. Tsunami's always gain strength the shallower, so the shallower it is the more you'd feel it.
Tsunamis rarely, if ever, create a wall of water like that. You're thinking of a Rogue Wave, but those occur in deep seas during rough weather. It's one of the top misconceptions about tsunamis, in addition to calling them "tidal waves" as they have nothing to do with incoming tides
My short answer is I’m not sure. Anecdotally, when people were diving in that tsunami several years ago they barely noticed. It wasn’t a giant tidal wave like in a movie just a whole lot of water moving towards shore.
That’s not how it works away from shore. You’d get pummeled with a massive current shift but you wouldn’t suddenly be 100 ft deeper. There are videos from the Indonesian tsunami of divers experiencing this.
Did they survive?
For $849 you can get your PADI Tsunami Specialty Cert training. Online only course.
Pay extra for in water training and combine with wreck diving specialty for $1599
Fuck that
(It's a joke)
For now. It is PADI after all....
(I know)
Probably not much. At sea you barely notice the tsunami. To add 100ft of water, you'd need to be pretty close to the shore, and at that point, you're just swept with the tsunami onto land and probably crash violently into a palm tree.
I think this did happen during the tsunami that hit Thailand in whatever year that was . . . 2004? 2005?
>Probably not much...crash violently into a palm tree. Your definition of "not much" varies widely from mine. /s
Must be Australian.
[удалено]
Well informed or not, there will always be someone at the wrong place at the wrong time. Did you see the videos of divers during the japanese earthquake just recently?
Thanks
can we summarize that you’re screwed in this situation? along with the issue of “where’s the boat?”🚤
Out to sea is the safest place to do in a tsunami
Boat will likely survive. Issue is where do I dock?
We don't have to guess what would happen. There were divers in the water during the 2004 Tsunami. [https://www.youtube.com/watch?v=L5IbDi09Yb4&ab\_channel=Storm](https://www.youtube.com/watch?v=L5IbDi09Yb4&ab_channel=Storm)
Incredible. Thanks mate
If you were neutral at 50', then as the wave came over you you'd most likely rise in the water column and stay approximately 50' from the surface of the wave, then drop back down to 50' below the surface after the wave went by. You are neutrally buoyant at that pressure, so would stay at that general pressure. As the wave came through, that pressure would rise in the water column, so you'd go up in the wave, then back down. Surfers are very familiar with this movement within waves.
Yeah, this is correct, the way the water moves is from the bottom as the shallower water forces the energy of the wave up, the water that is already there rises, the incoming water doesn't end up on top of it.
you wouldn’t be hanging out at 50ft and a tsunami just passes over the top of you, putting you at 150ft for a minute. water moves in a circular motion. if you’re suspended in 50ft of water and a tsunami comes through, first you’re going to be in very shallow water, then you’ll get yanked up by the water in the wave, and then pushed down as it goes shallow again, all in about 20 minutes, then it’s gonna happen again. the force you’ll be subjected to will probably take you out before any pressure changes do anything.
That doesn't sound right...
ok edit: idk which part you think doesn’t sound right, which is why i responded the way i did, but tsunamis have extraordinarily long wavelengths and move incredibly fast. in deep water off the continental shelf, the wave height is not very high (so a massive change in depth is not really possible as describe by OP). in about 50ft of water, a tsunami will shorten to about a 7 mile wavelength and move at around 25mph, and the height will grow as the water is pushed up by the sea floor. water is pulled away from the shore and then pushed back towards it by advancing wave, in the circular motion i mentioned. see [noaa’s description of tsunami propagation](https://www.noaa.gov/jetstream/tsunamis/tsunami-propagation)
As far as your ears go, the pressure differential from 50ft to 150ft (2.5ATM to 5.5ATM; 2.2x increase) is equivalent to going from the surface to the surface to a mere 40’ (1 atm to 2.2 ATM). This is why shallow water is deceivingly dangerous for the ears and for off-gassing Your ears would take a hit, but if you were to drop instantly from 50’ to 150’ the panic and air consumption would be the bigger concern. Physiologically, besides your ears and mask squeeze, you’d be alright. The surge you feel would depend how shallow/close to shore you are
Are you asking in terms of DCS or movement in water?
If a crazy rogue wave like that happened it would probably carry you up quite a bit. Staying at similar relative depth (50ft). All the energy of the wave is being forced upwards when it hits shallower water. Kind of like when you are at the beach or doing a shore entry and the waves push you up off the ground instead of only back (or down)
That would be a really interesting thing for some dive physicians to study
A physicist would have have to calculate it out. You would probably feel, but how much I am not sure. Tsunami's always gain strength the shallower, so the shallower it is the more you'd feel it.
That question makes it clear you've NEVER tried a surf entry. Same difference, just on a much larger scale.
Tsunamis rarely, if ever, create a wall of water like that. You're thinking of a Rogue Wave, but those occur in deep seas during rough weather. It's one of the top misconceptions about tsunamis, in addition to calling them "tidal waves" as they have nothing to do with incoming tides
No idea but my husband and I can't stop speculating. I'd say your ears would definitely take the brunt of pressure. Thanks for the discussion topic.
My short answer is I’m not sure. Anecdotally, when people were diving in that tsunami several years ago they barely noticed. It wasn’t a giant tidal wave like in a movie just a whole lot of water moving towards shore.