Register to reply

Reversal of earth's magnetic field

by Roodles01
Tags: earth, field, magnetic, reversal
Share this thread:
Roodles01
#1
Apr28-14, 07:56 AM
Roodles01's Avatar
P: 112
I understand that the sun changes magnetic polarity far more often than Earth does (correct me if I'm wrong as it's just what I read).

Apparently it is statistically likely that the earth's magnetic field will change polarity at some time, so what sort of effects will this have in practcal terms on us and our environment, apart from ruining the betting odds of any sensible result in pigeon racing or possibly getting the auroras in odd places


Can you think of any products which would be advantageous to have given this situation if it happened suddenly as I'd like to get in with the patents well before the event!
Phys.Org News Partner Earth sciences news on Phys.org
Evo
#2
Apr28-14, 11:19 AM
Mentor
Evo's Avatar
P: 26,557
The reversal isn't sudden, it usually happens gradually over a period of 1,000-5,000 years. It's been ~780k years since the last reversal, and scientists say it may happen in another 1,000 years, or not.

From the many articles and programs I have read, the wikipedia article actually does a fine job of briefly going over the issues.

http://en.wikipedia.org/wiki/Geomagnetic_reversal

I can post other links later. But you should read this first.
davenn
#3
Apr28-14, 06:40 PM
Sci Advisor
PF Gold
davenn's Avatar
P: 2,667
hi Evo,

you had better correct your 780 million years to 780,000 yrs

there's been some 20 - 21 reversals in the last 5 million years

cheers
Dave

Evo
#4
Apr28-14, 10:07 PM
Mentor
Evo's Avatar
P: 26,557
Reversal of earth's magnetic field

Quote Quote by davenn View Post
hi Evo,

you had better correct your 780 million years to 780,000 yrs

there's been some 20 - 21 reversals in the last 5 million years

cheers
Dave
LOL!! Corrected, thanks! I got it correct in other threads I've posted on this. We've had quite a few.


Register to reply

Related Discussions
Earth's magnetic field Classical Physics 1
Earth's Magnetic Field Earth 12
Earth's magnetic field Introductory Physics Homework 1
Earth's magnetic field Introductory Physics Homework 1
Earth's magnetic field? Astronomy & Astrophysics 1