My indoor pressure sensors registered both eruptions (?). Iam from germany.
How big was the Tonga eruption?
131–140 of 269 posts
Re: How big was the Tonga eruption?
#132Earlier quoted context omitted.
> And then you have idiots that build train tracks and highways right through lava I was disappointed to see no active lava flows in your linked image. What you show is simply a road and train tracks built on top of rocks.
Lava will likely flow there again the next time Shasta erupts.
Its eruption history is on the order of once every hundreds of years. By the time its next eruption comes around, it's very possible that infrastructure will be long gone for other reasons.
In most cases, infrastructure existence and placement is barely a blip on geologic time.
Re: How big was the Tonga eruption?
#133The animation with it placed over Florida helped me understand, but also gave me a really good idea...
No need to take action, Florida Man is on the job!
Re: How big was the Tonga eruption?
#134This looks like a tedious process that I would have totally done on my own had I thought of it. By that I mean the painstaking process of matting out each frame, then randomly placing it on places of the map, just because I could, just for the lulz. I'm not discounting it as "i could have thought of that", but appreciation for how useful it actually is. Some people cannot grasp certain things without visuals, and thi…
I'd like to see what it would have looked like on Mars.
Re: How big was the Tonga eruption?
#135Earlier quoted context omitted.
My colleague's backyard weather station picked up the pressure wave in Christchurch several times as it repeatedly circled the globe. Sea levels in the upper south were a little 'odd', trending higher and more variably than usual, even if not by that much, for a week.
I find it difficult to believe that even a massive eruption could literally push sea levels up or down in the surrounding area (waves /= sea level). Volcanoes are massive, but the energy to move cubic miles of water, water many hundreds or thousands of miles away, is at different level. Hurricanes can move water like that, but they do so with orders of magnitude greater energy (tens of thousands of nukes).
US tsunami monitoring has a record.
Re: How big was the Tonga eruption?
#136Earlier quoted context omitted.
How about this tool? https://evergiven-everywhere.glitch.me/ Granted, it's the Evergiven, but how hard would it be to exchange the image?
You can choose the 2022 Tonga eruption example on the tool. https://www.leventhalmap.org/projects/insizeor/
Oh, nice! Moving around gives a really good feeling for map projection too.
Re: How big was the Tonga eruption?
#137Someone else estimated the Tonga explosion at 10 megatons [1] and it was heard thousands of miles away. Bear in mind, humans have detonated nuclear weapons larger than this, most famously the Tsar Bomba [2] at 50 megatons. Compare this to something not that long ago: Krakatoa, estimated at 200 megatons [3]. Then compare this to the Year Without Summer (536 AD) [4]: > Falling in the time known as the 'Dark Ages', the…
The magnetic poles are about to flip Austin actually :) At least we know this time
Re: How big was the Tonga eruption?
#138This is an excellent lesson in how shitty my sense of geographic scale is. I would have guessed that the size of the eruption was on par with the size of a small city.
The Pacific Ocean is ginormous (I think that’s the technical term?) I often find myself surprised when I spin a globe (physical or virtual) and compare the expanse of the ocean to my neighborhood of the planet. The scale also makes the history of Polynesian seafaring all that more incredible.
Yes, they had incredible techniques. They could detect a remote island by the way the swell is disrupted. Also recently read about Magellan's voyage and it is remarkable that they made it.
Re: How big was the Tonga eruption?
#139world's largest boom box for sure.. that bass travelled
Re: How big was the Tonga eruption?
#140Earlier quoted context omitted.
I find it difficult to believe that even a massive eruption could literally push sea levels up or down in the surrounding area (waves /= sea level). Volcanoes are massive, but the energy to move cubic miles of water, water many hundreds or thousands of miles away, is at different level. Hurricanes can move water like that, but they do so with orders of magnitude greater energy (tens of thousands of nukes).
US tsunami monitoring has a record. https://www.tsunami.gov/previous.events/?p=03-19-09-Tonga
A tsunami is a wave. Not sea level. Waves literally come and go over a period of seconds to minutes. They wobble back and forth without actually moving much water. Sea levels move on the order of hours and days and involve the physical movement of literally hundreds of cubic-miles of water. Raising or lowering a sea level measurement (not a temporary wave) requires far more energy than a volcano.
From the link: "Listed wave heights are maximum amplitude in cm (above sea level)." In other words, even tsunami waves heights are not changes to sea level.