Several credible eyewitnesses are adamant that they heard explosions in or near
the towers."
PROTEC COMMENT: Maybe they did hear loud noises that sounded to them like
explosions, but such statements do nothing to refute scientific evidence that
explosives were not used.
Arguing over who heard explosion-like noise
s, when they heard them, how loud they
were or from what direction they came is a pointless exercise. This is not to imply that
any witness should be ridiculed or dismissed; however, such subjective, highly
interpretive statements do nothing to prove or disprove the presence of explosives.
Simply put, there are countless causes of sharp, loud noises that have no relation to
explosives.
The only scientifically legitimate way to ascertain if explosives were used is to cross-
reference the fundamental characteristics of an explosive detonation with independent
ground vibration data recorded near Ground Zero on 9/11. Fortunately, several
seismographs were recording ground vibration that morning, and perhaps more
fortunately, all available data is consistent and appears to paint a clear picture.
Seismographs at Columbia University's Lam
ont-Doherty Earth Observatory in Palisades,
New York, recorded the collapses of WTC 1, 2 and 7. This data was later released to
the public and currently appears on their website. Additionally, on 9/11 Protec field
technicians were utilizing portable field seismographs to continuously record ground
vibrations on several construction sites in Manhattan and Brooklyn for liability purposes.
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 agai
nst 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.