| Polar
Motion Is Unsteady & Looks Deeply Anomalous At The Moment
by Michael
Mandeville The anomalous motion in the location of the Spin Axis which I have been remarking upon is continuing. Part of the reason is we are in the X MIN phase, or nearly so. Comparison of X MIN phases during the last 100 years quickly demonstrates that the X MIN motion is the least regular motion of the spin axis. So in a sense this phase is always somewhat anomalous from all others. But there is more here than during the past. The tightening spiral is just too tight at the moment. Obviously there is a large displacement of the focal point (ave. location of the pole), substantially larger than normal. For another thing, the motion of the Spin Axis is actually hesitating. There is a resistance to a smooth and regular motion in the wobble. The Spin Axis has actually slowed its wobble motion drastically during the past few weeks. This has no impact on the DAY or the regular 24 hour spin of the Earth. I am not talking about the actual spin, I am talking about the motion of the changing LOCATION of the spin axis. It is currently at nearly a dead stop. This hesitation can be seen in polar motion predictions from the supercomputers. The next X MIN is now being projected by IERS to arrive on June 28. Here is the defining moment as predicted in France. These are the dates of the highest X values for 2006. Date MJD x(arcsec)
y(arcsec) UT1-UTC(sec)
This point is earlier than predicted last week, earlier by four days and at a higher point than last week (0.0912). This is a significant deviation showing the current hesitation. The Earth appears to hesitate on each swing of the Spin Axis through this same quadrant. I believe that we will continue to see the X MIN coming in even earlier. I believe that this is going to make it a short (not so) "seven" year cycle from MIN to MIN. I believe that we are going to be short a few months, the shortest cycle possibly in 100 years. I will have to measure this out after Christmas, month by month for many cycles. Does this mean things really are speeding up? I think it may mean a "phase shift", which pretty much qualifies as being in the same pew as speeding up, at least temporarily. But don't go too far out on a limb with this yet. Let me do the hard numbers. The date for transistion of the annual x plot motion to dip below X=0 has only slipped by one day, to October 9. This will commence the window of extraordinary seismic risk in the Northern Arc of the Pacific Rim of Fire. The swing of the X plot into negative numbers after the X WAVE MIN, is the period of time in which earthquakes suddenly spike in daily frequency for magnitudes 3.0 and above in California and Japan, as I detected for the 1990's. I believe this will happen again, most likely anytime between about November 1 through to about the end of January. According to the IERS numbers, the super computer model expects the wobble spiral to normalize out by widening out substantially during the next six months to show less curl. Maybe so, but the super computers cannot predict an anomalous shift in the phase and amplitude of the Wobble, such as occurred in 1936 and at a few other X MIN points. So it is inherently unknowable what is playing out at the moment. Regardless, this coming year should be more active than this year for volcanism, but I believe that the season in 2007 will be even more awesome. Side note: Hardly
anyone is studying PLANETARY volcanism. Mostly people into such things
study VOLCANOES. Accordingly, we have no decent planet-scope figures
and it is thus hard to make truly objective charts. Smithsonian figures
are quite squishy and their reports do not add up with other sites,
and other impressions, for instance, with the Southwest Volcano Centre
in Tuscon, which appears to be more aggressive in tracking volcanic
eruptions. EVEN SO, it is clear that over-all volcanism has increased
significantly duriing the past five years. Best Wishes, Michael
Wells Mandeville, Author of "Return
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