# How would changes in the Earth's magnetic field affect space exploration?

It is well-known that the Earth's magnetic field may flip (geomagnetic reversal), and some data suggests it is weakening or distorting. The following shows the Earth's magnetic field at its surface in June 2014 (by ESA) which shows some distortion.

My question is, can such changes in the Earth's magnetic field affect the space exploration systems and satellites and possibly cause troubles for them?

• The time of variation is wildly different. The time scale of the field reversals is $100,000$ to $1,000,000$ years according to your link. As spacecraft programs are no longer than decades the field won't change enough to matter in that time. Measurements like this are interesting to understand geophysics, but the variation is small over a human lifetime. – Ross Millikan Apr 19 '15 at 4:48