Massive ULF 'Blast' Detected In US Bridge Collapse Catastrophe, page 2

First off, you ought to hit "Sorcha Faal" and close the window.

Second - "Sorcha" is making the same mistake that several posters in this thread have. Radio waves are not sound waves. Say it with me - radio waves are not sound waves. They are not related in any way. If you see someone conflating sound and radio/EM, you immediately know they don't have a clue.

Therefore, by stating in one line "Siberian Solar Radio Telescope (SSRT) detected a ‘massive’ ultra low frequency (ULF) ‘blast’" and then "...one of the United States primary research organizations into acoustic weapons research is Augsburg College" in another, you immediately know that the author is a nitwit.

Third. Low frequency anythings have long wavelengths. The longer the wavelength, the bigger the "focus". You cannot sharply focus a long wavelength sound or radio wave, because the smallest focus you're going to get is about 1/2 wavelength. For a ULF EM wave, that might be half a planet wide. Therefore, you can't target a structure with it. There are exceptions for EM where you can play around with metamaterials and evanescent waves but not for ULF.

Fourth. Receiving long wavelength radio waves requires long antennas, or really quirky receivers that look at the slopes of H-fields using superconducting magnetic field detector arrays. It's not the sort of thing you can or would add to a radio telescope, again, it's one of those wavelength related issues. That doesn't mean they don't have an ELF/ULF receiver, but the article stated that it was received by the radio telescope, which is nonsense.

Fifth. The concept that every material has some magic frequency (no one seems to ever come down on whether that's sound or EM) is not one you'll find well supported in science. I used to see it a lot on "Voyage to the Bottom of the Sea". It is true that elements have transition frequencies where you can get electrons to change state, that's how you get LEDs to work. That doesn't mean that the element goes away or blows up or what-have-you. There are other frequencies (usually in the microwave region) where you'll hit non-transition couples like spinning, rocking, scissoring and the like which are also defined by the quantum of momentum. This is how they do microwave spectroscopy. Again, hitting a material with this frequency doesn't make it fly apart, although it may preferentially absorb energy as heat.

For sound waves, there are usually mechanical resonances, but these may not be well defined for any particular shape, and the Q of the material/structure may not lend itself to supporting really good Tacoma Narrows type resonances. Without a really high Q to permit significant energy storage in the structure, you won't be able to beam some magic sound wave at the structure and make it fall apart without killing everyone in the vicinity.

The death beam/ULF thing doesn't hold water. But you could have stopped at "Sorcha Faal" and saved some time.

On the other hand, I could have done it with some explosives. You'd generally try to knock out a key structure and get the thing to tear itself to pieces, if possible starting from a single point. I see THAT happening, but I don't see any evidence of charges going off.

Therefore I'd assume it just fell in. Bridges fail all the time. Generally not quite this dramatically, but it happens.