Lunar Notes (not music): Perigee is when the Moon is closest to Earth in its various 28-29 day orbit cycles. Apogee is when it is farthest from Earth. The difference between Perigee and Apogee (P-A) is PA Flux. Flux is related to gravitational pull between the Moon and Earth. The greatest flux creates the greatest gravitational stress. We see this in the oceanic tides. Once each month the tides rise the highest around the time of Perigee. We also see the greatest ebb associated with the greatest Apogee (when the Moon is farthest away from Earth). The greatest tidal flux occurs when the PA Flux is greatest. What we cannot see is the effect on Earths crust, or mantle. The same thing happens there (and in the atmosphere). The difference is - we cant see it like we can see the tide. This year, Perigee occurred on July 13. The next highest Perigees to follow was on August 10. The next is on September 8. Apogees occurred on July 28 and August 24. The PA Flux of all those dates were: 100% (highest for the year), 99.91 and 96.9%. The PA Flux for the coming Sept 8 Perigee will be 95.5%. After that is will decline rapidly for the rest of the year until it begins to rise again around Christmas. The Point: Bardarbunga began shaking and magma began moving around August 16-17, about halfway between August 10 and 28, between 2 of the strongest PA Fluxes of the year. Now its moving, so inertia is at play. Thats why I think it will be interesting to see what happens as we near September 8 and the days after when the next significant PA Flux occurs. What do you think?
Posted on: Sun, 31 Aug 2014 15:35:04 +0000
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