Thursday, March 24, 2011

Our bipolar planet

After some 400 years of relative stability, Earth's North Magnetic Pole has moved nearly 1,100 kilometers out into the Arctic Ocean during the last century and at its present rate could move from northern Canada to Siberia within the next half-century. Tampa International Airport has recently updated its runway compass markings. Could other airports be far behind?

The overall magnetic field has been decreasing as well. Scientists have only been able to measure the intensity of the field since the 1830s, but ever since then, its strength has been on the decline, having decreased by about 10% since it was first measured. Could there be a connection to what seems like a recent increase in earthquake activity?

1 comment:

  1. The end is near... more like 2032 than 2012 methinks, but what do I know? ;)