Well, first of all, you can purchase tools to make certain anomalies appear. However, a few days ago, just for laughs, I tried to go through each of the locations to see if there were patterns for when certain conditions appeared in that area. In some areas, it seems that the reflection mode is certainly followed by a past mode. However, on other days, the same location produced a different set of mode/anomalies rotation. I think the algorithm is different at least every other day. So most of the time, I just play until what I'm looking for comes up. But I will say that I do notice that when I close out of the game for the day I make note of where certain modes are located. The next time I open it, they usually are different.
Comment found on Hidden City: Now for the anomalies : ...