It probably has to do with the air and sea currents near the equator. The Moon and Sun may play a role in the way that hurricanes move as well.
I know that you are going to say it is because the world turns.
Well of course that is what I think, I just want to hear a flat earth explanation for this well known phenomenon. Also, you are aware that according to round earthers (translation: everyone) the currents are caused by many things but at the equator the same forces effecting hurricanes are also effecting currents and winds.
Observations show that no hurricanes form within 5 degrees latitude of the equator. People argue that the Coriolis force is too weak there to get air to rotate around a low pressure rather than flow from high to low pressure, which it does initially. If you can't get the air to rotate you can't get a storm. This is a reason why genesis does not occur at low latitudes.
BTW fephoenix.... As much as I agree with nearly every point you've been making in these forums I think you are incorrect in this instance. It does appear to me that the image shows storms reaching over land. This is okay though because neither myself nor the image determined what level of tropical storm the tracks show before the line stops being drawn. Storms do go over land but then die off after some time and dissipate. As I mentioned before, the ends of these tracks could merely be the remnants of these storms. Also, as I mentioned earlier, this image is merely being used as a reference and bringing light to these specifics are not relevant to the reason why I started this thread in the first place.