Earths Magnetic Field

[Sparky]

Mingling lines of magnetic force from the sun and Earth criss-cross and join to create the openings. "X-points" are where the criss-cross takes place. The sudden joining of magnetic fields can propel jets of charged particles from the X-point, creating an "electron diffusion region."

Thanks for the info., but this makes my brain hurt, trying to understand how it works....

Will just have to accept the data of the effect.

[seasmith]

_ A so-called electron diffusion region. It is a boundary just a few kilometres thick that occurs at an altitude of approximately 60000 kilometres above the Earth’s surface, where electrons can be accelerated to approximately one hundredth the speed of light. On 25 January 2005, and for nineteen times in one hour, the Cluster quartet found themselves engulfed in an electron diffusion region.
http://www.esa.int/esaCP/SEM8DA9ATME_index_1.html





_Electron Diffusion Region (EDR)- In a plasma (a gas of charged particles), during magnetic recon[figuration], magnetic field lines of opposite direction ... [reconfigure], forming an X-line magnetic topology. The new... field lines accelerate the plasma away from the X-line. (Credit: Center for Visual computing, Univ. of California Riverside)

“Understanding the structure of the diffusion region and its role in controlling the rate at which magnetic energy is converted into particle energy remains a key scientific challenge,” says Dr Michael Shay, University of Delaware, USA.
Until recently, theoretical scientists believed that the electron diffusion region was relatively tiny (width about 2 km, length about 10 km)...

Comparison between observations and simulation
On 14 January 2003, the four Cluster satellites were crossing the magnetosheath, a turbulent plasma region located just outside Earth’s magnetosphere, when they encountered an electron diffusion region. The length of the observed region measured 3000 km, 300 times longer than the earlier theoretical expectations and four times longer than seen in recent simulations. Nevertheless, the observations strongly support new simulations.

http://www.sciencedaily.com/releases/20 ... 230056.htm



Sparky,

Apparently they have been working on this data forawhile and have just recently decided that these cusps, forming periodically at junctures of the solar magnetic flux and the earth's magnetosphere, can form "portals" which conduce a rush of ions ("accelerate the plasma away from the X-line") right through our magnetosphere.

Here the electrons are provided by the current sheets which collimate the earth-magnetosphere like the layers of a big green-onion / shallot,
~ but comes to mind the physics of an old TV picture tube where diffuse electrons (from the the wall outlet) are collimated by the magnetic yolks (cusps) and and shot down tube, like a portal to our eyeballs.

s

Observing the Electron Diffusion Regionwith MMS

http://yosemite2010.swri.edu/talks/Torbert.pdf

[Lloyd]

Magnetic Field Decline Started in 1860
* That's what this article says: http://www.newscientist.com/article/dn9148-ships-logs-give-clues-to-earths-magnetic-decline.html. It says before 1860 the decline was negligible. So it's been declining only for 150 years.
* What caused the decline to start at that time?
* Wikipedia says: Its magnitude at the Earth's surface ranges from 25,000 to 65,000 nanoteslas (0.25 to 0.65 gauss); ... the present strong deterioration corresponds to a 10–15% decline over the last 150 years and has accelerated in the past several years....

[seasmith]

by Lloyd » Sat Sep 08, 2012 2:31 pm

Magnetic Field Decline Started in 1860
* That's what this article says: http://www.newscientist.com/article/dn9 ... cline.html. It says before 1860 the decline was negligible. So it's been declining only for 150 years.
* What caused the decline to start at that time?

Transiting intragalactic DL (cusp) ?

[moses]

The ships logs only measured the direction of the magnetic field, which could include the angle into which the field entered the ocean. And then the article goes on to mention that the major difference is located around South America. And the article mentions measurements of bricks and pottery, etc, without mentioning more ancient measurements of such, or producing a graph of these results.

So all told - a pretty poor article.
Mo

[project722]

In the EUT, how is the earths magnetic field generated? Does the dynamo effect still hold water in this model?

[Sparky]

Earth's magnetic field is an even bigger mystery. Some mechanism obviously generates the field, and many scientists think the field is formed from fluid iron in Earth's main outer core acting like a giant electric dynamo, or motor. The geomagnetic field, as it is called, shuts down periodically and sometimes reverses its polarity -- with the North and South poles exchanging their magnetic charges.

The energy sources previously thought to power the dynamo are unable to decrease and then increase again, Herndon explained, so scientists have had to resort to assuming the dynamo mechanism is inherently unstable.

Interesting idea, supported by evidence.