2012 and beyond
Graham Hancock has suggested in his book Fingerprints of the Gods, that an unusual planetary alignment at the end of the Great Cycle will cause a gravitational effect on the crust of the Earth, which is top-heavy with polar ice. The crust will slip, wiping out most of the life on Earth as a result of colossal tidal waves. However, this planetary alignment is due on 24 December 2011, which is the date given by Frank Waters in Mexico Mystique as the end of the Great Cycle. Since the end-point has now been confirmed as 21 December 2012, if we are due for crustal displacement, this alignment will probably NOT be the trigger (see addendum).
About Crustal displacement
information source http://www.diagnosis2012.co.uk