Let's take a look at similar earthquakes in 2010 - 7.5 and stronger. There were four of them (I'm not using 2011 because of the Japan earthquake and all of its aftershocks don't make it a good point of comparison:
Magnitude 7.8 NORTHERN SUMATRA, INDONESIA April 06, 2010
Magnitude 7.5 NICOBAR ISLANDS, INDIA REGION June 12, 2010
Magnitude 7.6 MORO GULF, MINDANAO, PHILIPPINES July 23, 2010
Magnitude 7.7 KEPULAUAN MENTAWAI REGION, INDONESIA October 25, 2010
Four earthquakes. Giving your window of this happening within two days, that means a four-day window for a given quake to seem to have some correlation.
Four quakes times four days, and that's sixteen days. That means a random prediction had a 4.3 percent chance (16/365) of random correlation to a 7.5+ quake in 2010.
Lots of folks play the Pick 3 in the state lottery with far worse odds. Some even think their particular numbers are lucky.
Let’s not jump the gun here. This one is a day or two short. Now if we get a big one on exactly the 22nd or within a few hours of the 22nd, the 188 day theory gets real interesting, IMO.