Reply #6: Why would I make such an assumption?

[Bolo Boffin]

http://ae911truth.info/pdf/blanchard_implosion.pdf

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.

There were no detonations, so there could have been no explosive residues.