Seismic spike indicates explosion before collapse

[Anders]

Hi,

I have found some evidence for explosion at the South Tower happening several seconds before the start of the collapse.

Quote from the official 9/11 Commission Report: "At 9:58:59, the South Tower collapsed in ten seconds". See Chapter 9.2 SEPTEMBER 11,2001:

Seismograms recorded by LCSN Station PAL:

See:

The seismic recording shows the time for a seismic event related to the collapse of the South Tower: 9:59:04. Notice here that this is the time for the recording at the PAL station. It takes about 17 seconds *) for the seismic wave to reach the PAL center from the source at WTC. Therefore the time for the seismic event at the source was: 9:58:47.

The time difference between the start of the collapse 9:58:59 and the recorded seismic event at the source 9:58:47 for the South Tower is 12 seconds. This indicates that an explosion happened at the WTC about 12 seconds before the start of the collapse of the South Tower.

I have seen claims that the time scale on the x-axis of each seismogram shows the time at the source, not at the PAL station where they were recorded. But the diagram says: "East-West component of motion at PAL". Indicating the time at the source wouldn't make sense for a seismogram, and if the time indicated was at the source then we get an inconsistency between the time stated in the official 9/11 Commission Report and the time recorded at the PAL station. This cannot be blamed on low signal-to-noise errors in time measurement at the PAL station since this was a huge seismic spike.

*) "This is based on an estimate of 2 km/s travel speed for the S waves, which, given the PAL station's distance of 34 KM from the WTC, gives a travel time of 17 seconds." -- From: http://911research.wtc7.net/wtc/analysi ... efall.html

[Edx]

Disproven at the thread so you're now spamming your crap here Anders?

And it seems you're a no planer to boot:

"I believe no planes hit the towers and that the impact floors were rigged beforehand with tons of kerosene, tons of Thermite and shape charges to produce the impact holes of planes. The rest was TV fakery" -

I'm not even sure Winston would defend that...

[Anders]

[Anders]

It seems that 'origin time' really is a seismic term for the time at the source. But then we get an inconsistency with officially reported times with 5 seconds and a huge discrepancy of 17 seconds for one of the plane impacts (which was a short event at the source and not something spanning over several seconds). So something is clearly inconsistent in the official report. Plus, although here I'm not sure yet, the seismic events for the collapses of the towers look way too 'spiky' and large to only have been caused by the collapses compared to the seismic event recorded for the collapse of WTC 7 (even when taking into consideration that WTC 7 was a much smaller building).

[Scepcop]

[Edx]