I postulate that a "Galactic Superwave" will cause this mammoth quake. The info below from a message channeled via Greg Giles also confirms quakes above Mag 10 will happen before the end of December 2012.
[link to www.ascensionearth2012.org
"We would like to work with you to resolve the issue of your shorelines in some areas that are faulty and do not offer adequate protection in the event that sea levels may rise even just a few inches, or in some cases, a few feet. This will not do, as the proper protection for communities and cities alike are seawalls that can withstand many feet of sea surge, as all planets experience their share of tremors and the shifting of tectonic plates from time to time. The events that we foresee in your very near future, just months away, are events that are not particularly above and beyond the norm of what many planets experience quite regularly. You have been quite fortunate in your recent history as you have not experienced a great seismic event by any means, as your tectonic plates have shifted, but have only shifted a few inches or a few feet in their most extreme movements.What we foresee in the months ahead is comparatively much more severe shifting which will move your tectonic plates above each other much further than they have been moved in your recent history.
We see them shifting 10, 15, or even 20 or more feet, which would cause tremors in the range of 8 to 10 on your Richter scale, all the way up to levels close to and beyond 15 or 16 on this scale.
Do you realize how severe these earthquakes are compared to the earthquakes that you have become accustomed to, earthquakes that seldom exceed eight or nine on your Richter scale? We are talking massive shaking of your inner Earth, but we do not wish for you to be alarmed or to fly into panic mode, for this is one of the reasons we are here. We are here to assist you better transition through this.
Through the means of our experience, expertise, wisdom and our highly advanced technology, we can assist you to withstand the forces of these earth shakings and allow you to withstand even far greater measures of seismic activity."
Also this one here, from April 2012: [link to www.ascensionearth2012.org
"We would like to share with you some further details of what you can expect in the days ahead, and we feel that this should give you solace and peace of mind knowing that there is nothing at all to be worried about. Towards the last quarter of your year of 2012, towards the months of October, November and December, we foresee some Earth tremors which will cause some water damage to homes and businesses located within areas that are prone to flooding.
These areas that we see as being prone to this kind of water damage include the state of Florida within the United States, the Southern California region of the United States, lowland areas of Northern Europe, and the area of South Asia. What we plan to do is temporarily relocate those of you who reside within these areas to locations that are not susceptible at all to this kind of water damage.
This is certainly nothing new to those who live in Florida and South Asia, as many times throughout your past residents of these areas have temporarily relocated due to approaching hurricanes and typhoons and the water damaged caused by rising sea levels. These residents returned to these areas after the storms had passed, and this is precisely how those of you who live in the areas that we feel are susceptible will experience the latter part of this year. The only difference this time will be that you will not have to relocate on your own through the means of your limited resources and little advanced notice to prepare."
I asked my online ET contacts Hagel and Valugua about the veracity and credibility of Greg Giles' channeled messages above, and they both confirmed that quakes above Magnitude 10 will happen before the end of December 2012.