Post by DannyRock on Feb 22, 2006 23:28:55 GMT -5
Major Anomaly In Chandler's Wobble - 2005/2006
last revised February 22, 2006
The Earth’s Wobble Remains Paused
What this portends, no one knows.
(ECB – February 22, 2006, MWM) About six weeks after the beginning of the pause on about ~January 5, 2006, the Earth resumed its wobble motion straight down the X Axis beginning about ~February 10, 2006. The wobble still has no net motion on the Y axis aside from very minor quivers such as are typically caused by atmospheric and tidal conditions.
The latest graphs from the IERS (International Earth Rotation Service), which is the only authoritative source of information on the motions of the poles (and earth’s crust) shows a reversal of the path which the Spin Axis took during November-December, when the current anomaly began. After a radical shift in the path for approximately two months, something paused the normal spiral motion of the Spin Axis during January and early February, 2006.
Normally at this time in the spiral motion of the wobble, the track of the moving Spin Axis would be moving to the right hand of the graph of polar motion, (see the Wobble Tracker graph below). The track should be nearly at the lowest point it would reach this year (on the Wobble Tracker chart) and should begin to slowly spiral back up towards the top of the graph no later than about the beginning of May at the latest. It is doubtful it will make it and indeed IERS predictions now show that this will not occur very late in 2006.
For the latest Wobble Tracker graph of Polar Motion as of February 21, 2006, see
www.michaelmandeville.com/earthmonitor/polarmotion/plots/ wobbletrac_Feb21_06.gif
www.michaelmandeville.com/earthmonitor/polarmotion/2006_wobble_anomaly.htm
last revised February 22, 2006
The Earth’s Wobble Remains Paused
What this portends, no one knows.
(ECB – February 22, 2006, MWM) About six weeks after the beginning of the pause on about ~January 5, 2006, the Earth resumed its wobble motion straight down the X Axis beginning about ~February 10, 2006. The wobble still has no net motion on the Y axis aside from very minor quivers such as are typically caused by atmospheric and tidal conditions.
The latest graphs from the IERS (International Earth Rotation Service), which is the only authoritative source of information on the motions of the poles (and earth’s crust) shows a reversal of the path which the Spin Axis took during November-December, when the current anomaly began. After a radical shift in the path for approximately two months, something paused the normal spiral motion of the Spin Axis during January and early February, 2006.
Normally at this time in the spiral motion of the wobble, the track of the moving Spin Axis would be moving to the right hand of the graph of polar motion, (see the Wobble Tracker graph below). The track should be nearly at the lowest point it would reach this year (on the Wobble Tracker chart) and should begin to slowly spiral back up towards the top of the graph no later than about the beginning of May at the latest. It is doubtful it will make it and indeed IERS predictions now show that this will not occur very late in 2006.
For the latest Wobble Tracker graph of Polar Motion as of February 21, 2006, see
www.michaelmandeville.com/earthmonitor/polarmotion/plots/ wobbletrac_Feb21_06.gif
www.michaelmandeville.com/earthmonitor/polarmotion/2006_wobble_anomaly.htm
