This cannot be seen with the charts I presently have stored at my Web site. But it will be possible to see it with the 1990 – 2003 year chart that I am preparing.

Those waves in the charts provide a good illustration of how the different solar and lunar cycles look compared with one another. One such comparison that I just noticed in that larger chart I am preparing looks at two moon orbital times. With one, the moon moves close to, farther away from, and then close to the Earth once a month. With the other the moon is directly over about 25N at one point during the month and then 25S at another point. Then later in the month it returns to 25N. If you compare those two cycles it takes them about 10 years to match one another.

In other words, if the moon is exactly, directly above 25N this month when it is closest to the Earth in its cycle, then next month when it is closest to the Earth it will be directly above say, 23N, then 21N the next month and on and on. In about six months it will be both closest to the Earth and roughly above 25S. And about six months later it will be back at about 25N. But it will not be both exactly, directly above 25N and closest to the Earth in its orbit at the same time for another 10 years.

Another of those lunar cycle comparisons involves comparing either of those two cycles with the time it takes for the moon to circle the Earth and return to a position in the sky where it is over the same longitude line as the sun. Those cycle times are quite a bit different in length compared to the close – distant, and north - south transit cycles.

SIGNIFICANCE

If earthquake occurrence times are in fact affected by the angles of the gravity forces relative to the north – south – east – west orientation of a fault zone etc. then it is important to understand how those solar and lunar transit cycles work. And my charts are intended in part to help show earthquake researchers around the world how they work.