The earth's magnetic field strength was measured by Carl Friedrich Gauss in 1835 and has been repeatedly measured since then, showing an exponential decay with a half-life of about 1400 years. This could also be stated as a relative decay of about 10% to 15% over the last 150 years. What would be some of the changes say if we went back in time 1400 years. Also look into the future, what will it hold for us in 1400 years?
2007-09-02 02:54:08 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Since we will al be dead in 1400 years, it probably won't matter much.
2007-09-02 03:07:46 · answer #1 · answered by Runa 7 · 1⤊ 3⤋
The Earth's magnetic field is a continuous moving field. It is caused by motion of fluids on the surface of the earth and also by motion of air fluids above the surface of the earth.
It order for magnetic fields to change the motional direction of the sea also would have to change as well wind directions.
A magnetic fied must have motion of electrons in order to be produced. And electrons have never stopped moving regardless of how many years have past on the Earth.
The 1400 years decays just is not plausible.
2007-09-02 07:15:06 · answer #2 · answered by goring 6 · 0⤊ 0⤋
Probably all unknown, except it is known that the Earth's Mag. Field has completely changed polarity several times in recent history (last Million years).
2007-09-02 03:03:55 · answer #3 · answered by jimmymae2000 7 · 1⤊ 0⤋
Probably about the same as the last time it reversed.
2007-09-02 04:19:21 · answer #4 · answered by Jim E 4 · 1⤊ 0⤋
Wow, I never heard that before...
Would magnetic compasses stop working???
2007-09-02 03:04:26 · answer #5 · answered by CinderBlock 5 · 2⤊ 0⤋