March 18, 2008

New wooble graphic!!

Via Michael Mandeville!!

: Spin Axis, Magnetic Poles


[3-18-08 ECB] POLAR MOTION: No change from prior weeks. There remains some apparent tendency to truncation of the spiral track on the Y Axis. Movement up and down the X Axis appears slightly easier for the Earth's crust than than movement on the Y Axis. This pattern we have been observing since the wobble "freeze" of January 2005.

[2-18-08 ECB] POLAR MOTION: The track now shows some outward expansion as one would expect.

[2-11-08 ECB] POLAR MOTION: Polar Motion apparently is now deviating once again from a normal track. What has been a smooth outward expansion since March 2006 is now apparently too truncated to be called an expansionary spiral. It is "retarded" and parallels far too closely the spiral track of 14 months ago. It should be showing progressive enlargement, but this is no longer evident. There are two possible explanations. One is that this Seven Year Wobble Cycle will be smaller than normal (which happens frequently). Another possible explanation is that the Wobble is merely showing us that significant drift in the average location of the center of the wobble has been and is still underway, such that the spiral center is now drifting towards the left bottom of the chart (down towards about Longitude West 70-80). This the Wobble has also done before. A third possibility is that both factors are in play. Stay tuned, the Wobble continues to be more dynamic than anyone previously imagined.

[1-28-08 ECB] POLAR MOTION: As reported January 27 in the "Pivot Point" Bulletin (see Yahoo Archives), the Earth was apparently at tectonic standstill on Saturday/Sunday (almost 0 seismic activity 4+, ultra-low activity in the range of 2.5-4)) while the Earth's tilted axis orientation (fixed on Polaris) began to recede from the orbital Perihelion point and thus begin the shift of the orientations of the Northern and Southern Hemispheres toward the Sun. Otherwise, no significant change from previous reports. The Spiral Track of Earth's Wobble continues to expand outward in a stable pattern. As can be expected (by looking at the history of the Wobble Track), the Earth's Wobble is currently receiving a boost of energy from the Earth's Perihelion moment with the Sun. Since the Earth is closer to the Sun at this moment, solar gravity is tugging in phase slightly more strongly on the heavy side of the Earth (the Southern Hemisphere). As a result the track of Polar Motion is now clearly showing a marked acceleration in the outward, expansionary movement of its spiral track. This is all normal. The Spin Axis is currently located in the longitude quadrant of the Russian Far East moving rapidly towards Alaska..

[11-12-07 ECB] WOBBLE TRACKER SOFTWARE IMPROVED. Davis Chapman graciously upgraded the WobbleTracker Software in a way which makes it easier to use and more analytically powerful for plotting exact date sequences. Anyone who has previously purchased WobbleTracker is eligible for an upgrade which I will email as a zip file.

Mouse arrow cursor points toward the latest location of Spin Axis

Image is from WobbleTracker software, drawn by MWM

Graph Scale is set to 1.0 arcseconds, Grid Size = 0.05 arcseconds
Time Domain as shown in upper right hand corner
All movement is counter-clockwise.

This chart shows the location of the North Spin Axis relative to the “map coordinates” which were established at the end of the 19th century. A drift of over 50 feet since 1900 in the circular track of Chandler’s Wobble is shown in this chart. This drift is the primary cause of the acceleration in Earth’s tectonic activity. In order to “parallel” the way in which geophysicists create and record the Earth’s polar location geo-reference system, this graph shows the negative numbers opposite to the manner which they are typically drawn in school books. –X is shown on the top half, and this corresponds to the direction of the Pacific Hemisphere. –Y is shown on the right side and this corresponds to the Eurasian Land Mass. X= Longitude 0, which is the Greenwich Meridian which bisects through England; +Y= Longitude West 90, which bisects through the Great Lakes (North America).

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