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Off Topic => Ten Forward => Topic started by: Rat_Boy on December 12, 2003, 09:37:57 am

Title: Earth losing it's magnetism
Post by: Rat_Boy on December 12, 2003, 09:37:57 am
From CNN

Well, that'll mess up the compass industry.
Title: Re: Earth losing it's magnetism
Post by: JMM on December 12, 2003, 09:41:21 am
Thank God for GPS!  
Title: Re: Earth losing it's magnetism
Post by: WaterTiger on December 12, 2003, 09:53:23 am
It happened before ...

From the article:

 
Quote:

 At that rate of decline, the field could vanish altogether in 1,500 to 2,000 years, said Jeremy Bloxham of Harvard University.

Hundreds of years could pass before a flip-flopped field returned to where it was 780,000 years ago. But scientists at a meeting of the American Geophysical Union cautioned that scenario is an unlikely one.
 



Some theorize it launched the Metazoic era.

This book touches on some of these fascinating topics ...

 Integration

Stormbringer will go nuts on this topic, don't get him started ... I can hear him typing now.

 

WaterTiger
Title: Re: Earth losing it's magnetism
Post by: hobbesmaster on December 12, 2003, 10:45:53 am
It looks like the field will just do a reversal, those are actually quite common geologically; the way to tell how old the ocean floor is at a given spot is to see how many reversals its gone through.  
Title: Re: Earth losing it's magnetism
Post by: WaterTiger on December 12, 2003, 10:48:45 am
 
Quote:

 the way to tell how old the ocean floor is at a given spot is to see how many reversals its gone through.
 



Got a deep-sea submersible handy? Where is Jacques Cousteau when you need him?

WT
Title: Re: Earth losing it's magnetism
Post by: Sirgod on December 12, 2003, 10:49:49 am
 
Quote:

Stormbringer will go nuts on this topic, don't get him started ... I can hear him typing now.
 


 

I tell you what though, If I need some estoric Bit of science to be answered I go to him.
Programming, toastyO, And for Everything else that Would make you think, why would I ever need to know that, Sethan.  

Stephen
Title: Re: Earth losing it's magnetism
Post by: Sethan on December 12, 2003, 11:35:01 am
Quote:

 And for Everything else that Would make you think, why would I ever need to know that, Sethan.  



Yep that's me.  Master of useless trivia.  If something is completely useless, and I ever learned it, I probably still remember it.

Example: When I was 12, I happened to see a wall chart listing "The International Definition of the Meter" - which was at the time 1,650,763.73 times the orange-red wavelength of the spectrum of krypton-86.  That definition hasn't been used since 1983 - so naturally, I still remember it 28 years after I saw the poster.

On the other hand, remembering to take out the garbage is a real challenge.  

Title: Re: Earth losing it's magnetism
Post by: Falaris on December 12, 2003, 12:20:48 pm
Quote:


On the other hand, remembering to take out the garbage is a real challenge.  




It's strange but I think our brains are primarily filled with the 'useless trivia' category.

Then again, if not things would probably be pretty boring....
 
Title: Re: Earth losing it's magnetism
Post by: Dogmatix! on December 12, 2003, 12:26:32 pm
Quote:

 
Quote:

 the way to tell how old the ocean floor is at a given spot is to see how many reversals its gone through.
 



Got a deep-sea submersible handy? Where is Jacques Cousteau when you need him?

WT  





"Deeper and deeper....colder and colder...."

"Michel is dead..."


 
Title: Re: Earth losing it's magnetism
Post by: WaterTiger on December 12, 2003, 12:35:32 pm
 
Quote:

 Posts: 4904  
Loc: Planet Claire  
 



I just noticed, Commodore Dogamatix ... Planet Claire, eh?

Reminds me of the B-52's concert at San Diego State University a few years back.

And now, thanks to you, I have that song stuck in my head this morning, rewinding in my brain to only the words I remember.

 

Rock lobster anyone?

WaterTiger
Title: Re: Earth losing it's magnetism
Post by: Death_Merchant on December 12, 2003, 01:02:12 pm
Quote:



And now, thanks to you, I have that song stuck in my head this morning, rewinding in my brain to only the words I remember.

Rock lobster anyone?

WaterTiger  


Go get Apple's free iTunes and listen to 30 sec samples of all that stuff.
Careful with buying... At a buck a song, it's real easy to get carried away...
That album (The B-52-'s, released 1979) is at the iTunes store for $8.91.
Curse you! Now I must buy it...

Oh, how's this for a song to get stuck in your head:
"My bologna has a first name. It's O S C A R....."  
Title: Re: Earth losing it's magnetism
Post by: WaterTiger on December 12, 2003, 01:04:25 pm
 
Quote:

"My bologna has a first name. It's O S C A R....."  



OMG! Noooooooo. Why did you do that DM? Uggggggggg.
Title: Re: Earth losing it's magnetism
Post by: S'Raek on December 12, 2003, 03:06:06 pm
Quote:

Oh, how's this for a song to get stuck in your head:
"My bologna has a first name. It's O S C A R....."  



Man, that was just cold!!  

But on topic, could this lessening of the magnetic field be the reason for the hole in the ozone layer that everyone has been so upset about?  Isn't that somewhere over the Atlantic?    
Title: Re: Earth losing it's magnetism
Post by: Stormbringer on December 12, 2003, 03:18:01 pm
At it's worst the southern ozone hole actually exposed part of Ausie land to unfiltered UV. Ozone is electrically charged so it likely is affected by the magnetosphere. Exactly how and how much I'm not sure. But the magnetic field reverses itself cyclicly in gelogic time. And as it switches direction there iss a brief period where it is nuetralized by equal alignments of forward and reversed magnetic domains in the geological strata. The variance over time results in grid north and magnetic north not agreeing to greater or lesser degrees. At the bottom of all military maps is a declination diagram which is a conversion factor to add or subtract in order to realine compass readings with grid north. But because that alignment changes overtimes older maps declination diagrams will not be correct for the present conversion factor. This is becaise as the plastic mantle lays down new layers under the old the domain alignment changes with currents in the molten material.
Title: Re: Earth losing it's magnetism
Post by: JMM on December 12, 2003, 03:27:45 pm
Also Napster is back!  
Title: Re: Earth losing it's magnetism
Post by: Stormbringer on December 12, 2003, 03:33:40 pm
There is a procedure for determining the current declination in any area by dialing in the correct azimuth to a known point from a known point then turning using record motion to magnetic north the new value on the dial will be the declination constant though the procedure is normally repeated several times using a succession of several known points and taking the mean reading if they agree to within half a mil. A mill is .05625 degrees. a degree is 17.7- mils.
Title: Re: Earth losing it's magnetism
Post by: IntgrSpin on December 12, 2003, 08:28:27 pm
Hey look at it this way...

If it flips, the north pole will actually be up north again.    
Title: Earth losing it's magnetism
Post by: Rat_Boy on December 12, 2003, 09:37:57 am
From CNN

Well, that'll mess up the compass industry.
Title: Re: Earth losing it's magnetism
Post by: JMM on December 12, 2003, 09:41:21 am
Thank God for GPS!  
Title: Re: Earth losing it's magnetism
Post by: WaterTiger on December 12, 2003, 09:53:23 am
It happened before ...

From the article:

 
Quote:

 At that rate of decline, the field could vanish altogether in 1,500 to 2,000 years, said Jeremy Bloxham of Harvard University.

Hundreds of years could pass before a flip-flopped field returned to where it was 780,000 years ago. But scientists at a meeting of the American Geophysical Union cautioned that scenario is an unlikely one.
 



Some theorize it launched the Metazoic era.

This book touches on some of these fascinating topics ...

 Integration

Stormbringer will go nuts on this topic, don't get him started ... I can hear him typing now.

 

WaterTiger
Title: Re: Earth losing it's magnetism
Post by: hobbesmaster on December 12, 2003, 10:45:53 am
It looks like the field will just do a reversal, those are actually quite common geologically; the way to tell how old the ocean floor is at a given spot is to see how many reversals its gone through.  
Title: Re: Earth losing it's magnetism
Post by: WaterTiger on December 12, 2003, 10:48:45 am
 
Quote:

 the way to tell how old the ocean floor is at a given spot is to see how many reversals its gone through.
 



Got a deep-sea submersible handy? Where is Jacques Cousteau when you need him?

WT
Title: Re: Earth losing it's magnetism
Post by: Sirgod on December 12, 2003, 10:49:49 am
 
Quote:

Stormbringer will go nuts on this topic, don't get him started ... I can hear him typing now.
 


 

I tell you what though, If I need some estoric Bit of science to be answered I go to him.
Programming, toastyO, And for Everything else that Would make you think, why would I ever need to know that, Sethan.  

Stephen
Title: Re: Earth losing it's magnetism
Post by: Sethan on December 12, 2003, 11:35:01 am
Quote:

 And for Everything else that Would make you think, why would I ever need to know that, Sethan.  



Yep that's me.  Master of useless trivia.  If something is completely useless, and I ever learned it, I probably still remember it.

Example: When I was 12, I happened to see a wall chart listing "The International Definition of the Meter" - which was at the time 1,650,763.73 times the orange-red wavelength of the spectrum of krypton-86.  That definition hasn't been used since 1983 - so naturally, I still remember it 28 years after I saw the poster.

On the other hand, remembering to take out the garbage is a real challenge.  

Title: Re: Earth losing it's magnetism
Post by: Falaris on December 12, 2003, 12:20:48 pm
Quote:


On the other hand, remembering to take out the garbage is a real challenge.  




It's strange but I think our brains are primarily filled with the 'useless trivia' category.

Then again, if not things would probably be pretty boring....
 
Title: Re: Earth losing it's magnetism
Post by: Dogmatix! on December 12, 2003, 12:26:32 pm
Quote:

 
Quote:

 the way to tell how old the ocean floor is at a given spot is to see how many reversals its gone through.
 



Got a deep-sea submersible handy? Where is Jacques Cousteau when you need him?

WT  





"Deeper and deeper....colder and colder...."

"Michel is dead..."


 
Title: Re: Earth losing it's magnetism
Post by: WaterTiger on December 12, 2003, 12:35:32 pm
 
Quote:

 Posts: 4904  
Loc: Planet Claire  
 



I just noticed, Commodore Dogamatix ... Planet Claire, eh?

Reminds me of the B-52's concert at San Diego State University a few years back.

And now, thanks to you, I have that song stuck in my head this morning, rewinding in my brain to only the words I remember.

 

Rock lobster anyone?

WaterTiger
Title: Re: Earth losing it's magnetism
Post by: Death_Merchant on December 12, 2003, 01:02:12 pm
Quote:



And now, thanks to you, I have that song stuck in my head this morning, rewinding in my brain to only the words I remember.

Rock lobster anyone?

WaterTiger  


Go get Apple's free iTunes and listen to 30 sec samples of all that stuff.
Careful with buying... At a buck a song, it's real easy to get carried away...
That album (The B-52-'s, released 1979) is at the iTunes store for $8.91.
Curse you! Now I must buy it...

Oh, how's this for a song to get stuck in your head:
"My bologna has a first name. It's O S C A R....."  
Title: Re: Earth losing it's magnetism
Post by: WaterTiger on December 12, 2003, 01:04:25 pm
 
Quote:

"My bologna has a first name. It's O S C A R....."  



OMG! Noooooooo. Why did you do that DM? Uggggggggg.
Title: Re: Earth losing it's magnetism
Post by: S'Raek on December 12, 2003, 03:06:06 pm
Quote:

Oh, how's this for a song to get stuck in your head:
"My bologna has a first name. It's O S C A R....."  



Man, that was just cold!!  

But on topic, could this lessening of the magnetic field be the reason for the hole in the ozone layer that everyone has been so upset about?  Isn't that somewhere over the Atlantic?    
Title: Re: Earth losing it's magnetism
Post by: Stormbringer on December 12, 2003, 03:18:01 pm
At it's worst the southern ozone hole actually exposed part of Ausie land to unfiltered UV. Ozone is electrically charged so it likely is affected by the magnetosphere. Exactly how and how much I'm not sure. But the magnetic field reverses itself cyclicly in gelogic time. And as it switches direction there iss a brief period where it is nuetralized by equal alignments of forward and reversed magnetic domains in the geological strata. The variance over time results in grid north and magnetic north not agreeing to greater or lesser degrees. At the bottom of all military maps is a declination diagram which is a conversion factor to add or subtract in order to realine compass readings with grid north. But because that alignment changes overtimes older maps declination diagrams will not be correct for the present conversion factor. This is becaise as the plastic mantle lays down new layers under the old the domain alignment changes with currents in the molten material.
Title: Re: Earth losing it's magnetism
Post by: JMM on December 12, 2003, 03:27:45 pm
Also Napster is back!  
Title: Re: Earth losing it's magnetism
Post by: Stormbringer on December 12, 2003, 03:33:40 pm
There is a procedure for determining the current declination in any area by dialing in the correct azimuth to a known point from a known point then turning using record motion to magnetic north the new value on the dial will be the declination constant though the procedure is normally repeated several times using a succession of several known points and taking the mean reading if they agree to within half a mil. A mill is .05625 degrees. a degree is 17.7- mils.
Title: Re: Earth losing it's magnetism
Post by: IntgrSpin on December 12, 2003, 08:28:27 pm
Hey look at it this way...

If it flips, the north pole will actually be up north again.    
Title: Earth losing it's magnetism
Post by: Rat_Boy on December 12, 2003, 09:37:57 am
From CNN

Well, that'll mess up the compass industry.
Title: Re: Earth losing it's magnetism
Post by: JMM on December 12, 2003, 09:41:21 am
Thank God for GPS!  
Title: Re: Earth losing it's magnetism
Post by: WaterTiger on December 12, 2003, 09:53:23 am
It happened before ...

From the article:

 
Quote:

 At that rate of decline, the field could vanish altogether in 1,500 to 2,000 years, said Jeremy Bloxham of Harvard University.

Hundreds of years could pass before a flip-flopped field returned to where it was 780,000 years ago. But scientists at a meeting of the American Geophysical Union cautioned that scenario is an unlikely one.
 



Some theorize it launched the Metazoic era.

This book touches on some of these fascinating topics ...

 Integration

Stormbringer will go nuts on this topic, don't get him started ... I can hear him typing now.

 

WaterTiger
Title: Re: Earth losing it's magnetism
Post by: hobbesmaster on December 12, 2003, 10:45:53 am
It looks like the field will just do a reversal, those are actually quite common geologically; the way to tell how old the ocean floor is at a given spot is to see how many reversals its gone through.  
Title: Re: Earth losing it's magnetism
Post by: WaterTiger on December 12, 2003, 10:48:45 am
 
Quote:

 the way to tell how old the ocean floor is at a given spot is to see how many reversals its gone through.
 



Got a deep-sea submersible handy? Where is Jacques Cousteau when you need him?

WT
Title: Re: Earth losing it's magnetism
Post by: Sirgod on December 12, 2003, 10:49:49 am
 
Quote:

Stormbringer will go nuts on this topic, don't get him started ... I can hear him typing now.
 


 

I tell you what though, If I need some estoric Bit of science to be answered I go to him.
Programming, toastyO, And for Everything else that Would make you think, why would I ever need to know that, Sethan.  

Stephen
Title: Re: Earth losing it's magnetism
Post by: Sethan on December 12, 2003, 11:35:01 am
Quote:

 And for Everything else that Would make you think, why would I ever need to know that, Sethan.  



Yep that's me.  Master of useless trivia.  If something is completely useless, and I ever learned it, I probably still remember it.

Example: When I was 12, I happened to see a wall chart listing "The International Definition of the Meter" - which was at the time 1,650,763.73 times the orange-red wavelength of the spectrum of krypton-86.  That definition hasn't been used since 1983 - so naturally, I still remember it 28 years after I saw the poster.

On the other hand, remembering to take out the garbage is a real challenge.  

Title: Re: Earth losing it's magnetism
Post by: Falaris on December 12, 2003, 12:20:48 pm
Quote:


On the other hand, remembering to take out the garbage is a real challenge.  




It's strange but I think our brains are primarily filled with the 'useless trivia' category.

Then again, if not things would probably be pretty boring....
 
Title: Re: Earth losing it's magnetism
Post by: Dogmatix! on December 12, 2003, 12:26:32 pm
Quote:

 
Quote:

 the way to tell how old the ocean floor is at a given spot is to see how many reversals its gone through.
 



Got a deep-sea submersible handy? Where is Jacques Cousteau when you need him?

WT  





"Deeper and deeper....colder and colder...."

"Michel is dead..."


 
Title: Re: Earth losing it's magnetism
Post by: WaterTiger on December 12, 2003, 12:35:32 pm
 
Quote:

 Posts: 4904  
Loc: Planet Claire  
 



I just noticed, Commodore Dogamatix ... Planet Claire, eh?

Reminds me of the B-52's concert at San Diego State University a few years back.

And now, thanks to you, I have that song stuck in my head this morning, rewinding in my brain to only the words I remember.

 

Rock lobster anyone?

WaterTiger
Title: Re: Earth losing it's magnetism
Post by: Death_Merchant on December 12, 2003, 01:02:12 pm
Quote:



And now, thanks to you, I have that song stuck in my head this morning, rewinding in my brain to only the words I remember.

Rock lobster anyone?

WaterTiger  


Go get Apple's free iTunes and listen to 30 sec samples of all that stuff.
Careful with buying... At a buck a song, it's real easy to get carried away...
That album (The B-52-'s, released 1979) is at the iTunes store for $8.91.
Curse you! Now I must buy it...

Oh, how's this for a song to get stuck in your head:
"My bologna has a first name. It's O S C A R....."  
Title: Re: Earth losing it's magnetism
Post by: WaterTiger on December 12, 2003, 01:04:25 pm
 
Quote:

"My bologna has a first name. It's O S C A R....."  



OMG! Noooooooo. Why did you do that DM? Uggggggggg.
Title: Re: Earth losing it's magnetism
Post by: S'Raek on December 12, 2003, 03:06:06 pm
Quote:

Oh, how's this for a song to get stuck in your head:
"My bologna has a first name. It's O S C A R....."  



Man, that was just cold!!  

But on topic, could this lessening of the magnetic field be the reason for the hole in the ozone layer that everyone has been so upset about?  Isn't that somewhere over the Atlantic?    
Title: Re: Earth losing it's magnetism
Post by: Stormbringer on December 12, 2003, 03:18:01 pm
At it's worst the southern ozone hole actually exposed part of Ausie land to unfiltered UV. Ozone is electrically charged so it likely is affected by the magnetosphere. Exactly how and how much I'm not sure. But the magnetic field reverses itself cyclicly in gelogic time. And as it switches direction there iss a brief period where it is nuetralized by equal alignments of forward and reversed magnetic domains in the geological strata. The variance over time results in grid north and magnetic north not agreeing to greater or lesser degrees. At the bottom of all military maps is a declination diagram which is a conversion factor to add or subtract in order to realine compass readings with grid north. But because that alignment changes overtimes older maps declination diagrams will not be correct for the present conversion factor. This is becaise as the plastic mantle lays down new layers under the old the domain alignment changes with currents in the molten material.
Title: Re: Earth losing it's magnetism
Post by: JMM on December 12, 2003, 03:27:45 pm
Also Napster is back!  
Title: Re: Earth losing it's magnetism
Post by: Stormbringer on December 12, 2003, 03:33:40 pm
There is a procedure for determining the current declination in any area by dialing in the correct azimuth to a known point from a known point then turning using record motion to magnetic north the new value on the dial will be the declination constant though the procedure is normally repeated several times using a succession of several known points and taking the mean reading if they agree to within half a mil. A mill is .05625 degrees. a degree is 17.7- mils.
Title: Re: Earth losing it's magnetism
Post by: IntgrSpin on December 12, 2003, 08:28:27 pm
Hey look at it this way...

If it flips, the north pole will actually be up north again.