Science
Related: About this forumEarth's Magnetic Field Is Up To Some Seriously Weird Stuff And No One Knows Why
Tom Hale
11 Jan 2019, 16:07
The planets magnetic field is up to mischief again and geologists are pretty dumbfounded.
Earths magnetic poles can wander several kilometers every year, however, the north pole's movement has become increasingly stranger in recent years. For reasons that are currently unclear, the magnetic north pole seems to be increasingly slipping away from Canada and towards Siberia at an erratic rate, according to a news report in Nature.
The location of the north magnetic pole appears to be governed by two large-scale patches of magnetic field, one beneath Canada and one beneath Siberia, Phil Livermore, a geomagnetist at the University of Leeds in the UK said at the latest American Geophysical Union meeting, according to Nature.
The Siberian patch is winning the competition.
Every five years, the National Oceanic and Atmospheric Administration (NOAA) maps out the Earths magnetic field in the World Magnetic Model (WMM). This was last published in 2015, with the next edition planned for 2020, but this freak behavior forced scientists to revise the map earlier than anticipated. Unfortunately, the revamped WMM was supposed to be released on January 15, but it's been postponed until at least January 30 due to the ongoing government shutdown.
More:
https://www.iflscience.com/environment/earths-magnetic-field-is-up-to-some-seriously-weird-stuff-and-no-one-knows-why-/
PoindexterOglethorpe
(25,908 posts)applegrove
(118,832 posts)PoindexterOglethorpe
(25,908 posts)I do know that the magnetic poles flip on a more or less regular basis.
applegrove
(118,832 posts)since humans have had electricity? And nothing happened? Or do you mean recent in geological time?
PoindexterOglethorpe
(25,908 posts)A quick Google search says that the last time it happened was about 780,000 years ago, but that flip probably happened very quickly.
The flipping of the magnetic north and south poles has been enormously useful in determining the age of various events, especially the sea floor spreading in the middle of the oceans.
If you do a Google search on this topic you will find lots of interesting articles.
Enjoy!
FirstLight
(13,366 posts)All of our electronics from big tech to handheld ,run on a certain polarity. You flip the current and shit melts down... sorry for being so scientific lol
sfwriter
(3,032 posts)The Siberian patch is winning the competition.