The 27-day pattern in Sun spots, lead us to know when future solar storms will happen! For example,

It is well known from astronomers that the Sun rotates its sunspots every 27.2 days.

It was also recently discovered that the same core of sun spots stay from one cycle, to the next one. They might not be visible but the magnetic core is there, invisible, and they show themselves again, over the next solar cycle, in that same solar surface spots. This is not to say that new magnetic cores will form, and give origin to new sunspots. But roughly the same sunspots appear over and over again after 27.2 days.

I then checked when there were recently sunspots facing Earth, and geomagnetic storms:
For example:
9 to 14 January 2011
5 to 10 February 2011
4 to 9 March 2011

Going backwards this correlates with major solar storms in 31-.5 August 2010, or even back to 20 January 2005, very close to 15 July 2001 and 2 April 2001.
Only the major storm of 29-4 Nov 2003 does not fit in the cycle. Curiously appearing 14 days later, as if in the opposite side of the sun, to where most intense sunspots referred before formed.

Have you followed so far?

Extending the 27.2 day cycle into the future, we will get for example the following dates:
31 to 4 April 2011
28 to 2 May 2011
...
12 to 17 September 2011
9 to 14 October 2011
5 to 10 November 2011
...
20 to 25 March 2012
16 to 21 April 2012
13 to 18 May 2012
10 to 15 June 2012
7 to 12 July 2012
...
18 to 23 December 2012

Curiously, the 21/12/2012 Mayan date, appears right on the spot, as the solar maximum is predicted for 2012 and 2013. As usual, major solar storms will occur. How big no one knows.

It will be interesting to see if the solar sunspots and corresponding geomagnetic storms on Earth will fit this pattern!

Now that's awesome. Someone could of said that for you to be like "omg!" and realize it or it actually is true,
But nothing much is going to happen just a few million would die that's all...

I also discovered this possible cycle, about 7 months which fit with most solar storms on past 10 years:
April 2001 (X20)
...
July 2002 (X4)
...
October 2003 (X28)
...
January 2005 (X17)
...
nothing big happened afterwards until the current solar cycle 24
...
19 January 2010 (strongest solar flare in 2 years)
4 August 2010 ("solar tsunami" of 1st August)
15 February 2011 (X2)

And the next big ones come in:

• 16-21 August or 12-17 September 2011 (most likely) or 9-14 October 2011
  
• 20-25 Mar 2012 or 16-21 Apr 2012 (most likely) or 13-18 May 2012
  
• 25-30 Oct 2012 or 21-26 Nov 2012 or 18-23 Dec 2012
  

The problem is that I am not sure what is the precise period of this cycle, it's something around 7 months.

also going backwards we will also find June 1991 flares (X12) and March 1989 (Quebec power grid failure)!

By some strange reason, the post appears now in the Japan forum.
Could any of the forum moderators, move it to the Fragile Earth forum?

I now think the most likely dates for a BIG solar storm will be:

• 13-18 May 2012
  
• 18-23 December 2012 (which is the Mayan end date)
  
• 23-28 July 2013

A major solar flare might also happen before in 12-17 September or 9-14 October 2011.
Please add 27 days after or before these dates, as sometimes the cycle varies a little bit.