That's not what the seismographers say.
mgs.md.gov/esic/publications/download/911pentagon.pdf[/url]
But if that's what you want to insist upon, you go right ahead. I'm not sure our 9/11 bedunkers even know what they are saying anymore.
That right ergo? What
do the seismographers say? Why don't you quote them if they back you up?
It's just the old Truther dodge of posting a tangential link without an excerpt, trying to fake supporting documentation.
I'll stick with real proofs like the one you're running from. Here it is again, from people who own seismographs and know controlled demolition, your friends at Implosion World:
In all cases where seismographs detected the collapses, waveform readings indicate a single, gradually ascending and descending level of ground vibration during the event. At no point during 9/11 were sudden or independent vibration “spikes” documented by any seismograph, and we are unaware of any entity possessing such data.
This evidence makes a compelling argument against explosive demolition. The laws of physics dictate that any detonation powerful enough to defeat steel columns would have transferred excess energy through those same columns into the ground, and would certainly have been detected by at least one of the monitors that were sensitive enough to record the structural collapses. However, a detailed analysis of all available data reveals no presence of any unusual or abnormal vibration events.
BTW. Figure 4 in that Pentagon paper you cite shows no big spikes before the south tower collapsed. You probably should read your links.