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Tinaa
2003-Dec-30, 07:43 PM
I came across this article (http://science.nasa.gov/headlines/y2003/29dec_magneticfield.htm?list1099495).

How might this affect the protection the magnetic field gives the earth? I'd love to see auroras in south Texas. Will a magnetic reversal cause any problems/changes on Earth?

Josh
2003-Dec-30, 11:29 PM
The article didn't seem to allude to any perceived problems. The bottom of the article said that the reversing of the magnetic poles takes about 1000 years to complete and while it's happening it just gets more complicated - doesn't disappear. "But it's still a planetary magnetic field, and it still protects us from space radiation and solar storms."

Tinaa
2003-Dec-31, 01:23 AM
Agreed Josh, but it also said the last shift was 780,000 years ago. Will it cause even more degradation of the Ozone layer? What was going on here 780,000 years ago? I know it was the Pleistocene Era. Big animals, lots of ice. Do any geologic or ice records show anything happened?