العربية
中国
Français
Deutsch
Ελληνική
हिन्दी
Italiano
日本語
Português
Русский
EspañolRAPID-DECAY THEORY
The 'rapid-decay theory' uses measurements of the Earth's magnetic field to advance the young Earth argument: that the Earth is thousands rather than billions of years old.
It has been long observed that Earth's magnetic field gradually changes in time (e.g., Henry Gellibrand, Gresham College, 1634). Much of this change is due to movement of the magnet poles, and changes in the Earth's non-dipole field but in addition the Earth's magnetic dipole has been decreasing by about 5% per century.[1] Data on the Earth's magnetic field (and its changes) are collated in the International Geomagnetic Reference Field (IGRF).[2]
While the details of the creationists' arguments have changed,
in essence the argument is that if the Earth's dipole changes by 5% per century, the Earth can't be much older than 20 centuries.
One proposal[3] is based on the assumption that Earth was created from pure water with all of the molecules' spins aligned creating a substantial magnetic field. However spin relaxation (NMR) times T1 and T2 are typically measured in the range of seconds.
Russell Humphreys[4]
accepts a core-current based magnetic field and archaeomagnetic
measurements of the magnetic field (based on measurements of human artefacts), and concludes that several reversals of the magnetic field occurred during the biblical flood. Such rapid (month long) variation contradict measurements of the conductivity of the Earth's mantle.[5]
Such ideas are inconsistent with the basic physics of magnetism.[6] While short term variations have been shown to be due to a variety of factors, the long-term (million year) the variation in field intensity (and even reversal in polarity) are modeled as due to changes in electric currents in the liquid core of the Earth.
1. Annual Review of Earth and Planetary Science, 1988 16 p.435 "Time Variations of the Earth's Magnetic Field: From Daily to Secular" by Vincent Courtillot and Jean Louis Le Mouel
2. "The International Geomagnetic Reference Field (IGRF)", The International Association of Geomagnetism and Aeronomy
3. "The Earth: Is It Young or Is It Old?", Dr. Jay L. Wile
4. "The Earth's Magnetic Field is Young ", Russell Humphreys, Institute for Creation research
5. Annual Review of Earth and Planetary Science, 1988 16 p.452 "Time Variations of the Earth's Magnetic Field: From Daily to Secular" by Vincent Courtillot and Jean Louis Le Mouel
6. Claim CD701, The TalkOrigins Archive
★ "The Earth: Is It Young or Is It Old?", Dr. Jay L. Wile
★ "Evidence For The Young-Earth Theory", Examine the Evidence
★ Dynamo theory
★ Age of the Earth
★ Young Earth creationism
| Contents |
| Analysis |
| Notes |
| References |
| See also |
Analysis
It has been long observed that Earth's magnetic field gradually changes in time (e.g., Henry Gellibrand, Gresham College, 1634). Much of this change is due to movement of the magnet poles, and changes in the Earth's non-dipole field but in addition the Earth's magnetic dipole has been decreasing by about 5% per century.[1] Data on the Earth's magnetic field (and its changes) are collated in the International Geomagnetic Reference Field (IGRF).[2]
While the details of the creationists' arguments have changed,
in essence the argument is that if the Earth's dipole changes by 5% per century, the Earth can't be much older than 20 centuries.
One proposal[3] is based on the assumption that Earth was created from pure water with all of the molecules' spins aligned creating a substantial magnetic field. However spin relaxation (NMR) times T1 and T2 are typically measured in the range of seconds.
Russell Humphreys[4]
accepts a core-current based magnetic field and archaeomagnetic
measurements of the magnetic field (based on measurements of human artefacts), and concludes that several reversals of the magnetic field occurred during the biblical flood. Such rapid (month long) variation contradict measurements of the conductivity of the Earth's mantle.[5]
Such ideas are inconsistent with the basic physics of magnetism.[6] While short term variations have been shown to be due to a variety of factors, the long-term (million year) the variation in field intensity (and even reversal in polarity) are modeled as due to changes in electric currents in the liquid core of the Earth.
Notes
1. Annual Review of Earth and Planetary Science, 1988 16 p.435 "Time Variations of the Earth's Magnetic Field: From Daily to Secular" by Vincent Courtillot and Jean Louis Le Mouel
2. "The International Geomagnetic Reference Field (IGRF)", The International Association of Geomagnetism and Aeronomy
3. "The Earth: Is It Young or Is It Old?", Dr. Jay L. Wile
4. "The Earth's Magnetic Field is Young ", Russell Humphreys, Institute for Creation research
5. Annual Review of Earth and Planetary Science, 1988 16 p.452 "Time Variations of the Earth's Magnetic Field: From Daily to Secular" by Vincent Courtillot and Jean Louis Le Mouel
6. Claim CD701, The TalkOrigins Archive
References
★ "The Earth: Is It Young or Is It Old?", Dr. Jay L. Wile
★ "Evidence For The Young-Earth Theory", Examine the Evidence
See also
★ Dynamo theory
★ Age of the Earth
★ Young Earth creationism
This article provided by Wikipedia. To edit the contents of this article, click here for original source.
psst.. try this: add to faves
