Seismic readings is one of the basic concepts of earthquake engineering which means application of an earthquake-generated agitation to a structure. Evidence on September 11, 2001 point to some form of demolition occurring. Seismic stations located in Columbia University’s Lamont-Doherty Earth Observatory (LDEO) in Palisades, New York, recorded various points that the earth shook on the morning of September 11. The NIST attributes this shaking to the debris hitting the ground with tremendous force. While the collapsing structures certainly did cause seismic readings to appear, incredibly the analysis of time shows that “seismic activity is noted 12 seconds before visible tower collapse” (Furlong, 8). These times, prior to the building collapse, coincide with the timing of over 60 personal testimonials describing either loud explosions or flashes from lower levels of the building (MacQueen, 57-72).
Overwhelming evidence points to the use of demolitions and explosives in bringing the towers down. It is highly improbable that the terrorists would have the means or the access to plant such devices throughout both structures, and the government’s denial of all these claims is hauntingly incriminating. Read more for further evidence.
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"Seismic Proof: 9/11 was an Inside Job!"
by Craig T. Furlong & Gordon Ross (Member, Scholars for 9/11 Truth)
SUMMARY
On 9/11 the seismic stations grouped around New York City recorded seismic events from the WTC site, two of which occurred immediately prior to the aircraft impacts upon the Twin Towers. Because these seismic events preceded the collisions, it is clear they were not associated with the impacts and must therefore be associated with some other occurrence. None of the authorities charged with the responsibility for the investigation of the events of 9/11 have proposed a source for these seismic events, nor have they given a valid reason for the difference in times between the seismic events and the aircraft impacts. Only by consideration of the evidence of basement explosions before the aircraft impacts, as experienced by William Rodriquez and 36 others, can an explanation be found for the fact that the seismic stations recorded seismic events originating from the WTC sites prior to the aircraft impacts. It seems unlikely that Middle Eastern terrorists could have overcome the WTC security and managed this kind of high level technological coordination. The facts presented here, simple and few, raise the possibility of inside help and involvement in 9/11/01, both before and after the attack.
Here are the impact times for each source:
AA Flt 11 UA Flt 175
LDEO: 8:46:26 9:02:54
9/11 Commission: 8:46:40 9:03:11
Differentials: 14 secs 17 secs
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The Missing Jolt: A Simple Refutation of the NIST-Bazant Collapse Hypothesis
Graeme MacQueen
Tony Szamboti
April 22, 2009*
NIST’s Hypothesis of Total Collapse:
Three essential elements of NIST’s hypothesis of total collapse are made explicit in the Final Report and the companion volumes of the study:
1. Because of damage to stories 93 to 98, and especially because of column buckling due to fire, the top 12 stories of the North Tower (99-110) plus the roof were, in effect, separated from the rest of the Tower and began to behave as a unit. [2]
2. This “rigid block” of 12 stories plus the roof began to move. First it tilted, and then it abruptly fell onto the stories beneath it. [3]
3. The fall of the rigid block caused such damage to the lower structure that “global collapse began.”[4]
The rigidity of the upper block of stories is crucial to this explanation. If the upper block were to break, disintegrate or flow on impact it would certainly not threaten the 92 intact floors beneath it.
d = ½ × g × t^2
where d stands for distance, g stands for acceleration due to gravity, which is 32.174 ft./s2 at sea level, and t stands for time. Using this formula, we discover that a freely falling object would travel 161.6 feet in the time it took the roof to drop 114.4 feet.
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Seismic Observations during September 11, 2001, Terrorist Attack.
Won-Young Kim
Lamont-Doherty Earth Observatory of Columbia University,
Palisades, N. Y. 10964, USA and
Gerald R. Baum
Environmental Geology and Mineral Resources Program,
Maryland Geological Survey
2300 St. Paul Street Baltimore, MD 21218, USA.
SUMMARY
Since the time of plane impact at the Pentagon had often been reported with large scatter, the United States Army contacted us to inquire whether we could obtain an accurate time of the Pentagon attack on September 11, 2001 based upon our seismic network. We analyzed seismic records from five stations in the northeastern United States, ranging from 63 to 350 km from the Pentagon. Despite detailed analysis of the data, we could not find a clear seismic signal. Even the closest station (Δ = 62.8 km) at Soldier's Delight, Baltimore County, Maryland (SDMD) did not record the impact. We concluded that the plane impact to the Pentagon generated relatively-weak seismic signals. However, we positively identified seismic signals associated with United Airlines Flight 93 that crashed near Shanksville, Somerset County, Pennsylvania. The time of the plane crash was 10:06:05 ±5 (EDT).
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References
Furlong, Craig T., and Gordon Ross. (Seismic Proof? 9/11 Was An Inside Job (Updated Version II).” Journal of 9/11 Studies. 3 (2006): 1-11. Web. 15 Mar. 2010.
MacQueen, Graeme, and Tony Szamboti. “The Missing Jolt: A Simple Refutation of the NIST-Bazant Collapse Hypothesis.” Journal of 9/11 Studies 24 (2009): 1-27. Web. 15 Mar 2010.
Won-Young, Kim, and Gerald R. Baum. "Seismic Observations during September 11, 2001,Terrorist Attack." Journal of 9/11 Studies. 3 (2006): 1-11. Web. 11 April 2010.