Magnetic Field to Flip
Source: strangesounds.org
Scientists that the earth is overdue for a pole shift because the earth's magnetic field has been weakening about 5% per century. The last known flip was about 41,000 years ago.
During a reversal, the magnetic field weakens and allows more radiation to reach the earth's surface. The increased radiation will affect satellites, avionics, communications and the power grid. This will also have a deleterious affect on the internet. They predict that people will have only about a window of a day to prepare.
Source: strangesounds.com