I observed the Lamb wave from Tonga on the pressure sensor of my backyard weather station in Halifax, Canada. Not only did I observe the shortest-path arrival, but I also observed the one that took the long way around the great circle route. My speed estimates are comparable to the published ones, around 300 m/s (299 ± 2 and 308 ± 1, respectively).
Great material! Proof that "not quantity but quality is the most important". And the link to "Springer Link" is for me the discovery of the internet times !!! I wouldn't have dug into him for the next 10 years myself. Fantastic!!! Thanks! Warsaw / Poland
Doctor, salió gracioso. Solo soy un laico y un topo de Internet. Pero elegí no eliminar este comentario para agradecer al Señor por compartir Su conocimiento de una manera interesante y comprensible.
honest answer: I do not recall, but I did do some digging because I was also expecting a speed around ~340 m/s. Interestingly, the speed found here, 309 m/s, is in great agreement with many other measurements including ionospheric disturbances and also with the pressure wave speed of other volcanic explosions like Krakatoa ~315 m/s.
Apologies for the late reply. Feel free to send me your measurement and I would happily provide a version of the main plot on the paper with your measurement highlighted so you can see where it fits in the global context. Check the About tab for contact info.
In blast engineering and explosion physics, tonnes (and their multiples) of energy are used as "TNT equivalent." If you report the yield of an explosion as x kilotonnes, nobody will ask "kilotonnes of what?" it isimplicit that this refers to the equivalent energy released by exploding TNT.
I found your channel based on your comment from this local Tonga resident's observation of barometric pressure changes preceding audible explosions. There were many such explosions in the other video. What happened at the volcano that caused the largest explosion that presumably your study analyzed? ua-cam.com/video/vn1Gfqd6SK4/v-deo.html
What happened to the volcano goes beyond my area of expertise; however, I would recommend the NOVA documentary "Hidden Volcano Abyss" about the eruption of Hunga Tonga-Hunga Ha'apai with volcano experts www.pbs.org/wgbh/nova/video/hidden-volcano-abyss/
I observed the Lamb wave from Tonga on the pressure sensor of my backyard weather station in Halifax, Canada. Not only did I observe the shortest-path arrival, but I also observed the one that took the long way around the great circle route. My speed estimates are comparable to the published ones, around 300 m/s (299 ± 2 and 308 ± 1, respectively).
Great material! Proof that "not quantity but quality is the most important". And the link to "Springer Link" is for me the discovery of the internet times !!! I wouldn't have dug into him for the next 10 years myself. Fantastic!!! Thanks! Warsaw / Poland
Doctor, salió gracioso. Solo soy un laico y un topo de Internet. Pero elegí no eliminar este comentario para agradecer al Señor por compartir Su conocimiento de una manera interesante y comprensible.
🙏🙏🙏🙏 I get smarter every vid
Thanks for watching and welcome to the channel
Why was the wave velocity ~30m/s below M1?
honest answer: I do not recall, but I did do some digging because I was also expecting a speed around ~340 m/s. Interestingly, the speed found here, 309 m/s, is in great agreement with many other measurements including ionospheric disturbances and also with the pressure wave speed of other volcanic explosions like Krakatoa ~315 m/s.
Done❤
Aw, my measurements from New Orleans didn't get in the dataset 😩
Apologies for the late reply. Feel free to send me your measurement and I would happily provide a version of the main plot on the paper with your measurement highlighted so you can see where it fits in the global context. Check the About tab for contact info.
2:14 Equivalent to 61M ton of TNT instead of 61 Mt of energy
In blast engineering and explosion physics, tonnes (and their multiples) of energy are used as "TNT equivalent." If you report the yield of an explosion as x kilotonnes, nobody will ask "kilotonnes of what?" it isimplicit that this refers to the equivalent energy released by exploding TNT.
I found your channel based on your comment from this local Tonga resident's observation of barometric pressure changes preceding audible explosions. There were many such explosions in the other video. What happened at the volcano that caused the largest explosion that presumably your study analyzed? ua-cam.com/video/vn1Gfqd6SK4/v-deo.html
What happened to the volcano goes beyond my area of expertise; however, I would recommend the NOVA documentary "Hidden Volcano Abyss" about the eruption of Hunga Tonga-Hunga Ha'apai with volcano experts www.pbs.org/wgbh/nova/video/hidden-volcano-abyss/