The climate change movement: July 28, 1995 to August 14, 2020 RIP

[oil pan 4]

It doesn't appear to record fast double flips or sudden excursions very well.

[Piotrsko]

Originally Posted by freebeard

archive.org/details/ChanThomasTheAdamAndEveStoryTheHistoryOfCataclysms 1993FullUNCENSORED

Here it is 'uncensored' but not unexpurgated. I haven't read it all myself, but my understanding is that the geological record doesn't reflect a pole flip if it flips back again.

Depending on the rate of flip, there might be record in whatever lava is cooling provided you could find where it was flowing during the flip. From what I understand the flips take some time to accomplish, but since there were few devices to measure the changeback then I dunno. Haven't seen a decent explanation of what compasses indicate during this flip either. I believe they discovered this looking at stretch marks the plates make moving about

[oil pan 4]

There has to be lava flowing some where at the time and some one has to lucky enough find it and not throw out the results because it's not what they expected.
When the earth goes dipole compasses will be useless.

[Piotrsko]

Ummm the earth is dipole right now. Di means two: one north indicated, one south.

The compasses will point some direction, otherwise the mag field sheilding the earth is gone away

AFAIK, compasses are useless on Mars and the.moon

[oil pan 4]

Should have been quadpole. For some reason dipole auto corrects to dipole. When the earth's magnetic field is really week expect to possibly see 4 magnetic poles.

[freebeard]

The compasses will point some direction, otherwise the mag field sheilding the earth is gone away

If the needle compass starts getting sluggish, then know the end is near.

A pole flip would be less traumatic than if the Core flips inside the Mantle. There exists a duckduckgo.com/?q=low+viscosity+shear+zone&ia=web

[aerohead]

Originally Posted by freebeard

archive.org/details/ChanThomasTheAdamAndEveStoryTheHistoryOfCataclysms 1993FullUNCENSORED

Here it is 'uncensored' but not unexpurgated. I haven't read it all myself, but my understanding is that the geological record doesn't reflect a pole flip if it flips back again.

The geologic record does record excursions, with jumps back to the original polarity.
For a long time, the US NAVY submariners used their own top-secret, sea-floor magnetometer data as a means to navigate under water.
They've declassified 'some' but not all of it.

[aerohead]

Originally Posted by oil pan 4

It doesn't appear to record fast double flips or sudden excursions very well.

We'd want to qualify the use of the word 'fast' when used in the context of any geological event. We can be talking about events which take tens of thousands of years to cycle.
Scientists will always provide the temporal scales associated with the phenomena they're discussing.

[aerohead]

Originally Posted by oil pan 4

There has to be lava flowing some where at the time and some one has to lucky enough find it and not throw out the results because it's not what they expected.
When the earth goes dipole compasses will be useless.

1) The excursion or reversal will have no impact on GPS.
2) And it will have no impact on inertial navigation.
3) Student, Sport, and Ultralite pilots will fly by VFR, just like they always have, using known landmarks to navigate.
4) Night flyers can also use celestial navigation, as has been used by U2, Apollo, and SR-71 pilots.

[aerohead]

My reading of magnetic polar drift doesn't emphasize any diminishment in field strength, only 'orientation.'
The magnetic 'poles' in an 'excursion' may 'tilt' up to 45-degrees, but they're just as strong.
In a full reversal, the poles are 'flipped' but just as strong.
It makes no difference if the aurora take place over the tropics.
The Earth's 'innards' are sufficiently solid, or super-high-viscosity plastic, so as to preclude any 'fast' dynamical movements.Thousands of years are necessary.