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logan
science forum beginner
Joined: 18 May 2005
Posts: 5
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 Posted: Wed May 18, 2005 9:45 pm Post subject:
Origin of Earth's Magnetic Field
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http://csep10.phys.utk.edu/astr161/lect/earth/magnetic.html
The above mentions that "The origin of the Earth's magnetic
field is not completely understood, but is thought to be associated
with electrical currents produced by the
coupling of convective effects and rotation in the
spinning liquid metallic outer core of iron and
nickel".
Have you watched the movie "The Core" where the spinning
liquid metallic outer core stopped and they had to
send nukes to reset it. Anyway. You know what keeps the
liquid core spinning? What powers it??
Any alternative theory wiz here can give what they think
is the origin of earth magnetic field which the article
said is not completely understood.
Another thing. The article says a permanent bar magnet
has moving electrons that creates the magnetic field.
What keep the electrons moving compared to other
stationary objects.
log |
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Uncle Al
science forum Guru
Joined: 24 Mar 2005
Posts: 1226
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| Posted: Wed May 18, 2005 9:52 pm Post subject:
Re: Origin of Earth's Magnetic Field
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logan wrote:
| Quote: |
http://csep10.phys.utk.edu/astr161/lect/earth/magnetic.html
The above mentions that "The origin of the Earth's magnetic
field is not completely understood, but is thought to be associated
with electrical currents produced by the
coupling of convective effects and rotation in the
spinning liquid metallic outer core of iron and
nickel".
Have you watched the movie "The Core" where the spinning
liquid metallic outer core stopped and they had to
send nukes to reset it. Anyway. You know what keeps the
liquid core spinning? What powers it??
[snip] |
Momentum. Idiot.
<http://www.newsdesk.umd.edu/scitech/release.cfm?ArticleID=992>
Ignorance can be educated. Stupidity is forever. Make your choice.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf |
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logan
science forum beginner
Joined: 18 May 2005
Posts: 5
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| Posted: Wed May 18, 2005 10:18 pm Post subject:
Re: Origin of Earth's Magnetic Field
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Genius. If you spin a top, it stops spinning after certain time. But
the spinning cores keeps spinning much like the moon around the
earth but it is in contact. Has anyone actually detected the spinning
outer core or is it only infered theoretically.
Hey. Eotvos wizard, you are bound for Sweden and Oprah. What
the hell are you doing in this list. Try to prepare and review
language lessons so you'd look good in Larry King Live interview
and dozens of other shows as you are hailed "the man who
wiped out 80% of M-theory in a single blow".
log |
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PD
science forum Guru
Joined: 03 May 2005
Posts: 4363
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| Posted: Wed May 18, 2005 11:41 pm Post subject:
Re: Origin of Earth's Magnetic Field
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logan wrote:
| Quote: | http://csep10.phys.utk.edu/astr161/lect/earth/magnetic.html
The above mentions that "The origin of the Earth's magnetic
field is not completely understood, but is thought to be associated
with electrical currents produced by the
coupling of convective effects and rotation in the
spinning liquid metallic outer core of iron and
nickel".
Have you watched the movie "The Core" where the spinning
liquid metallic outer core stopped and they had to
send nukes to reset it. Anyway. You know what keeps the
liquid core spinning? What powers it??
Any alternative theory wiz here can give what they think
is the origin of earth magnetic field which the article
said is not completely understood.
Another thing. The article says a permanent bar magnet
has moving electrons that creates the magnetic field.
What keep the electrons moving compared to other
stationary objects.
log
|
Scientific American within the last 3 months ran a terrific article
about the geomagnetic field and what the heck is happening during
reversals.
PD |
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PD
science forum Guru
Joined: 03 May 2005
Posts: 4363
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| Posted: Wed May 18, 2005 11:41 pm Post subject:
Re: Origin of Earth's Magnetic Field
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logan wrote:
| Quote: | http://csep10.phys.utk.edu/astr161/lect/earth/magnetic.html
The above mentions that "The origin of the Earth's magnetic
field is not completely understood, but is thought to be associated
with electrical currents produced by the
coupling of convective effects and rotation in the
spinning liquid metallic outer core of iron and
nickel".
Have you watched the movie "The Core" where the spinning
liquid metallic outer core stopped and they had to
send nukes to reset it. Anyway. You know what keeps the
liquid core spinning? What powers it??
Any alternative theory wiz here can give what they think
is the origin of earth magnetic field which the article
said is not completely understood.
Another thing. The article says a permanent bar magnet
has moving electrons that creates the magnetic field.
What keep the electrons moving compared to other
stationary objects.
log
|
Scientific American within the last 3 months ran a terrific article
about the geomagnetic field and what the heck is happening during
reversals.
PD |
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Llanzlan Klazmon
science forum addict
Joined: 29 Apr 2005
Posts: 70
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| Posted: Wed May 18, 2005 11:51 pm Post subject:
Re: Origin of Earth's Magnetic Field
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"logan" <logansummersh@yahoo.com> wrote in news:1116461880.183719.254950
@o13g2000cwo.googlegroups.com:
| Quote: | Genius. If you spin a top, it stops spinning after certain time.
|
Look up friction doofus.
Klazmon.
<SNIP> |
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Sam Wormley
science forum Guru
Joined: 30 Apr 2005
Posts: 1491
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John Popelish
science forum addict
Joined: 19 May 2005
Posts: 83
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| Posted: Thu May 19, 2005 1:02 am Post subject:
Re: Origin of Earth's Magnetic Field
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logan wrote:
| Quote: | http://csep10.phys.utk.edu/astr161/lect/earth/magnetic.html
The above mentions that "The origin of the Earth's magnetic
field is not completely understood, but is thought to be associated
with electrical currents produced by the
coupling of convective effects and rotation in the
spinning liquid metallic outer core of iron and
nickel".
Have you watched the movie "The Core" where the spinning
liquid metallic outer core stopped and they had to
send nukes to reset it. Anyway. You know what keeps the
liquid core spinning? What powers it??
Any alternative theory wiz here can give what they think
is the origin of earth magnetic field which the article
said is not completely understood.
Another thing. The article says a permanent bar magnet
has moving electrons that creates the magnetic field.
What keep the electrons moving compared to other
stationary objects.
log
Here is a pretty good article about results from a model of the |
positive feedback that would couple generation of current, the
magnetic field, convection and rotation:
http://es.ucsc.edu/~glatz/geodynamo.html |
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Guest
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| Posted: Sat May 21, 2005 12:09 am Post subject:
Re: Origin of Earth's Magnetic Field
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"PD" <pdraper@yahoo.com> wrote in message
news:1116466885.832365.293100@g44g2000cwa.googlegroups.com...
| Quote: | Scientific American within the last 3 months ran a terrific article
about the geomagnetic field and what the heck is happening during
reversals.
PD
Can you link or email me a copy. I have my own ideas about apparant |
geomagnetic reversals you know
Lee Pugh |
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PD
science forum Guru
Joined: 03 May 2005
Posts: 4363
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| Posted: Sun May 22, 2005 10:28 pm Post subject:
Re: Origin of Earth's Magnetic Field
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miltonpugh@sbcglobal.net wrote:
| Quote: | "PD" <pdraper@yahoo.com> wrote in message
news:1116466885.832365.293100@g44g2000cwa.googlegroups.com...
Scientific American within the last 3 months ran a terrific article
about the geomagnetic field and what the heck is happening during
reversals.
PD
Can you link or email me a copy. I have my own ideas about apparant
geomagnetic reversals you know
Lee Pugh
|
Get off the computer and visit your local public library.
PD |
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Sam Wormley
science forum Guru
Joined: 30 Apr 2005
Posts: 1491
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| Posted: Sun May 22, 2005 10:58 pm Post subject:
Re: Origin of Earth's Magnetic Field
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miltonpugh@sbcglobal.net wrote:
| Quote: | "PD" <pdraper@yahoo.com> wrote in message
news:1116466885.832365.293100@g44g2000cwa.googlegroups.com...
Scientific American within the last 3 months ran a terrific article
about the geomagnetic field and what the heck is happening during
reversals.
PD
Can you link or email me a copy. I have my own ideas about apparant
geomagnetic reversals you know
Lee Pugh
|
Buy a copy or go to your public library and learn something. |
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Maleki
science forum Guru
Joined: 29 Apr 2005
Posts: 304
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| Posted: Mon May 23, 2005 4:11 pm Post subject:
Re: Origin of Earth's Magnetic Field
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On Mon, 23 May 2005 00:58:25 GMT, Sam Wormley wrote:
| Quote: | miltonpugh@sbcglobal.net wrote:
"PD" <pdraper@yahoo.com> wrote in message
news:1116466885.832365.293100@g44g2000cwa.googlegroups.com...
Scientific American within the last 3 months ran a terrific article
about the geomagnetic field and what the heck is happening during
reversals.
PD
Can you link or email me a copy. I have my own ideas about apparant
geomagnetic reversals you know
Lee Pugh
Buy a copy or go to your public library and learn something.
|
Download it free from eMule. |
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Guest
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| Posted: Mon May 23, 2005 8:48 pm Post subject:
Re: Origin of Earth's Magnetic Field
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I think that the origin of the Earth's magnetic field may be the
atmosphere. The atmosphere generates a small but constant magnetic
field which then drives the larger magnetic field coming from the core.
It has been observed that about 10% of the surface magnetic field may
be due to processes in the Earth's atmosphere
http://www.albany.edu/faculty/rgk/atm101/magnet.htm. Weather generally
moves from west to east, and we know that the earth has a large
electric field and that charge separation happens in the cloud layers.
The charged atmosphere could be considered a large conductor moving
from west to east and may setup an initial weak magnetic field that
helps jumpstart or regulate the field from the larger molten core. This
would make the very specific prediction that the strength of the
magnetic field relies on the atmosphere and rotation. So no atmosphere
means little magnetism and lots of moving atmosphere means big magnetic
field. I believe this holds true in the solar system. The moon and
mercury have little atmosphere and little magnetic field. Mars also has
much less atmosphere and magnetic field. Saturn and Jupiter have much
atmosphere and rotation and huge magnetic fields. Venus has lots of
atmosphere, but very little rotation. See a chart of atmospheric
pressure rotation and magnetic fields at:
<http://www.astronomynotes.com/solarsys/plantblb.htm>.
fhumag |
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The Ghost In The Machine
science forum Guru
Joined: 25 Mar 2005
Posts: 1551
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| Posted: Tue May 24, 2005 3:00 am Post subject:
Re: Origin of Earth's Magnetic Field
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In sci.physics, franklinhu@yahoo.com
<franklinhu@yahoo.com>
wrote
on 23 May 2005 15:48:23 -0700
<1116888503.375094.74780@g43g2000cwa.googlegroups.com>:
| Quote: | I think that the origin of the Earth's magnetic field may be the
atmosphere. The atmosphere generates a small but constant magnetic
field which then drives the larger magnetic field coming from the core.
|
And how, precisely, would it do this with no ferromagnetic
materials to speak of floating about in the atmosphere?
Also, compass needles always point north. The north
point does drift a bit but I for one would think the
current flow within thunderstorms both (a) in the wrong
direction and (b) not large and constant enough to
allow for compass needles to point north.
In order to have a needle pointing north one would need
a current girding at or near the magnetic equator (which
is slightly tilted from the true equator, since the
magnetic poles are not coincident with the true poles).
Admittedly, it's not an impossible notion but I for one
would think that far more current is needed to generate
a ~ 10^-4 Tesla field on the ground in the temperate zones
than is provided by the weather.
| Quote: |
It has been observed that about 10% of the surface magnetic field may
be due to processes in the Earth's atmosphere
http://www.albany.edu/faculty/rgk/atm101/magnet.htm. Weather generally
moves from west to east, and we know that the earth has a large
electric field and that charge separation happens in the cloud layers.
The charged atmosphere could be considered a large conductor moving
from west to east and may setup an initial weak magnetic field that
helps jumpstart or regulate the field from the larger molten core. This
would make the very specific prediction that the strength of the
magnetic field relies on the atmosphere and rotation. So no atmosphere
means little magnetism and lots of moving atmosphere means big magnetic
field. I believe this holds true in the solar system. The moon and
mercury have little atmosphere and little magnetic field. Mars also has
much less atmosphere and magnetic field. Saturn and Jupiter have much
atmosphere and rotation and huge magnetic fields. Venus has lots of
atmosphere, but very little rotation. See a chart of atmospheric
pressure rotation and magnetic fields at:
http://www.astronomynotes.com/solarsys/plantblb.htm>.
fhumag
|
Mercury has a nice magnetic field. Does it have an atmosphere?
--
#191, ewill3@earthlink.net
It's still legal to go .sigless. |
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H. Dziardziel
science forum beginner
Joined: 10 May 2005
Posts: 40
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| Posted: Wed May 25, 2005 1:20 pm Post subject:
Re: Origin of Earth's Magnetic Field
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On 23 May 2005 15:48:23 -0700, franklinhu@yahoo.com wrote:
| Quote: | I think that the origin of the Earth's magnetic field may be the
atmosphere. The atmosphere generates a small but constant magnetic
field which then drives the larger magnetic field coming from the core.
It has been observed that about 10% of the surface magnetic field may
be due to processes in the Earth's atmosphere
http://www.albany.edu/faculty/rgk/atm101/magnet.htm. Weather generally
moves from west to east, and we know that the earth has a large
electric field and that charge separation happens in the cloud layers.
The charged atmosphere could be considered a large conductor moving
from west to east and may setup an initial weak magnetic field that
helps jumpstart or regulate the field from the larger molten core. This
would make the very specific prediction that the strength of the
magnetic field relies on the atmosphere and rotation. So no atmosphere
means little magnetism and lots of moving atmosphere means big magnetic
field. I believe this holds true in the solar system. The moon and
mercury have little atmosphere and little magnetic field. Mars also has
much less atmosphere and magnetic field. Saturn and Jupiter have much
atmosphere and rotation and huge magnetic fields. Venus has lots of
atmosphere, but very little rotation. See a chart of atmospheric
pressure rotation and magnetic fields at:
http://www.astronomynotes.com/solarsys/plantblb.htm>.
fhumag
|
I believe it's the other way around; the magnetic fields retain
the atmospheres. Thanks for the link. |
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