And if something fails to happen, how would you know it was averted or whether it never was to happen to begin with? That's a common and reasonable question.
Regarding personal events, however, I noticed that anything of an emotionally charged nature is preceded by a buildup of various types of dream/synchronistic "signs" and "trends". This happens often enough that when these signs appear to me, I can be sure that the emotionally charged event soon manifests. Often these situations are beyond my control and therefore it's not just self-fulfilling prophecy.
But if I act on these signs and go out of my way to anticipate the most probable outcomes, then most often the signs subside and then nothing unusual happens. I have tried both letting it flow and stopping the flow often enough to conclude that a probable future can be averted through awareness and anticipation.
So maybe this is true on a larger scale. Which is more unusual, that an event should happen, or that an event should not happen given the current signs and trends? For instance, given that dark clouds are looming over head and you hear thunder, it is more unusual for it not to rain. But if the sky is blue, then no rain is normal. There's just enough to the magnetic pole flip idea to catch my interest, but not enough to show whether a non-event was will be due to aversion or not.
One of the indicators would be animals. They are known for reacting ahead of time to tornadoes, volcanic erruptions and earthquakes. Our cat also reacts to what must be alien beings lurking around in the etheric prior to an attempted abduction or some sort of psychic manipulation. Impatiens, thanks for sharing that observation about the one flock of birds flying north.
Acquiring fringe knowledge is like digging for diamonds in a mine field.
(all eyes are peering at the weekend, with furitive looks.... 
It will become a nice decoration that hangs from my car's rearview mirror!
