Part II
History Reveals The Truth
If we are asked which way the sun comes up, we would usually say, "Oh, in the East, of course" and that it goes down in the West. This, however is not precise. Due East, by the compass is 90 degrees and the sun does not always come up due East! Due West is at 270 degrees by the compass. Many people are stunned to find out that there are actually TWO North's! Our compasses point to "magnetic" North, due to the magnetic attraction of the compass needle. But the North Pole is not due North. This goes for every direction that there is; The South Pole is not South by the compass and neither is East or West. Now that I have you thoroughly confused, let me explain a little better!
It is theorized that the core of the Earth spins off axis from the crust of the Earth. Kind've like a ball within a hollow sphere. The axis of the core, or inner ball, determines which way is magnetic North! True North is the name for the direction that the North Pole lies and Magnetic North is the name of the direction that the compass points. Airplane pilots have to adjust for this difference because the lines of longitude and latitude are laid out in reference to True North (the North Pole), but the instruments that they use utilize Magnetic North. The interesting thing, is that over the past, Magnetic North has changed! It has wandered over many miles. In fact there is proof that it has changed drastically, perhaps even 180 degrees or more. This can be seen from iron filings found in ancient pottery, that are oriented different from what we now know to be North.
A change in Magnetic North may not necessarily be devastating to the people who inhabit the Earth. We might have to change our instrumentation and pilots might get lost for awhile, but depending upon the time this change takes, there would likely not be grand destruction. But it is unlikely that such a change would occur in solidarity. There may be many factors to consider, not just a core shift. The possible causes to such a change would likely influence the crust as well as the core. It would likely affect geology as well as weather, biological stasis as well as psychology. This is the reason that the restriction of one discipline to a subject greatly limits our ability to comprehend. 
So again the question: Has this occurred in the past? The resounding proof is YES, it has happened and suggests that it could happen again. Perhaps in the near future. The proof is in the ancient structures fashioned by our ancestors on this hemisphere and perhaps around the world.
The ancient cultures that occupied the Americas are well known to have been incredible astronomers. They were star gazers. But for what purpose would they watch the stars? Some suggest it was to watch for the return of their gods. There may be another reason, if not greatly more important, in fact their very lives may have depended upon it. Many skeptics have ridiculed those that support the idea that comets are a threat to this world. They cite references that the ancients feared comets because they associated bad things happening in the same time periods, just by happenstance. Such as the death of Caesar following the passing of a visible comet. Again this is our puffed up egos working over time. We believe that because we are "modern" or have sophisticated equipment (like the HST) that we are better able to come up with the answers. This is a falsehood that will be our undoing if we are unable to correct our assumptions. Modern man is not here only because our ape like ancestors just happened to survive. The ancients were learned in the field of astronomy because it was necessary to their survival.
If there was a shift in the crust, it would have caused a change in planting seasons, weather patterns would drastically be altered, atmospheric and magnetic conditions would be affected. It is possible that great land masses could be distorted and changed, rivers change course and oceans spill over their banks. This could occur quickly, over two or three days, or it could take months. There could be warning signs that something was about to occur. And what kind of signs could be expected if there was a change coming? The signs would be in the heavens above!
Because the Earth is tilted in the ecliptic plane around the sun (23.5 degrees), the sun appears to rise and set in a little different place every day. Our daylight becomes longer in summer and shorter in the winter (Northern Hemisphere). On summer solstice the sun rises at its northern most point and on the winter solstice it rises at its further most southern point.

It should be pointed out here, that all of the archeological sites named within this page, that are located on the Western Hemisphere, have been dated by conventional means (which means carbon-14 dating), are believed to have been built since A.D. One. However taking into consideration the inaccuracy of Carbon-14, these edifices could have been erected as far back as 1000 B.C., but are not older. Making the following phenomenon, by age standards, a nearly current event.
Please see THE MILLENNIUM GROUP's extraordinary finding concerning COSMIC RAYS from the sun!
This will change the way you view this entire document!

These dates were important for ancient Americans as seen in  observatory codex. In the Madrid Codex seen here in figure 3, two priests sit atop the pyramid, one facing the sunrise and one facing the sunset. The big "X" of circles and merlons (the "L" shaped figures) point to the rising and setting solar positions of the winter and summer solstice. Pairs of priests positioned around the perimeter, are the "keepers" of the cardinal directions; North, East, South, and West. 
These positioning attributes can be seen in many other drawings by the ancients such as the Codex Fejervery-Mayer (figure 4, seen here) and the well known Aztec Calendar (figure 5, below).
When they built a city, it was the practice for their temple to be the central building amidst the grand observatory. This is a common motif among many of the structures throughout the MesoAmericas, such as, the Temple of The Seven Dolls at Dzibilchaltun, Naachtun and El Seibal, and possibly Cahal Pichik and La Muneca [5]. The layout of these cities was generally precisely aligned with the cardinal compass. In addition, what is unique about many of these structures is that there exists a substructure built sometime prior to a stone and rubble veneer that they are covered over by at a later date. The substructures are generally great slabs of stone and the coverings are either made by another group of builders with new techniques or done without the expectation that building would need to be repeated. But why cover up perfectly fine structures, with rubble and veneer? The only possible logical reason is that they were no longer useful. And the only thing that would make them obsolete is for a cardinal shift to occur. If the sun were to rise or set in a different position.
In the ancient city of Teotihuacan, below the Pyramid of the Moon, there is a structure called The Building of the Altars. In the figure, you can see a central platform, and around the perimeter a platform at each of the cardinal points. Between the cardinal points lie other platforms, which indicate the solstice points. This structure is strictly laid out in reference to the other structures within the city.
Survey markers have been found three kilometers to the east and west of the main access. The river has even been turned to cross the main access at a right angle. Direction was of profound importance to these people. There is one very peculiar thing although about the city; It is oriented 15 degrees east of True North!
In the "older" portion of the site at Chichen Itza there is a well known observatory called the Caracol. It is a solar observatory used to mark the seasons. Unfortunately the small windows used to sight the sun on critical dates - the solstice and equinox, do not line up at all. Again, to the east of North!
Many are bothered by this fact, such as Andrews[1]: 
"It cannot be proven that the tower was actually used for purposes of observation, but it is the only logical explanation which can be advanced in support of its unusual form and details with respect to 'window' openings." 
So frustrated that many deny it is an observatory at all.
At the Templo de los Aires at Zempoala is a unique open aired structure for what appears to be solar observations. It is a circular wall with "merlons" ("L" shaped structures as seen in the first codex above) around the top. There are 260 of these merlons, which represented the 260 days of the pre-Columbian ceremonial year, that sit atop the circular structure. There are also four "double" merlons that each represent the cardinal points, just as in the codex above. The curious thing is, that these merlons represent directions, again 15 degrees east of North! Or 345 degrees west of North.  

There are many examples of this phenomenon throughout the Americas. And there are many more details that cannot be included in this limited space. 

In Cherokee County, Texas at the George C. Davis Site, this strangeness shows up again. There are literally hundreds of sites that reflect this phenomenon. Is there a good explanation for this?  

There have been many arguments disputing the possibility of a crustal shift. I'm not here, and this material is not here to argue the point. Arguing rarely convinces anyone, or changes anyone's mind about this subject. If you already believe it, on one hand, these truths will definitely help you feel better about these beliefs. But on the other hand, the possibility means the possibility of a shift re-occurring. That is not comforting at all.