Earth’s magnetic field shifts ten times faster than expected

The Earth's magnetic field can change direction up to ten times faster than previously realized, according to a new study from the University of Leeds and UC San Diego. Satellites have improved efforts to  measure and track the ever-shifting magnetic field in recent years, but scientists also need to examine how the field has changed and evolved throughout history. "We have very incomplete knowledge of our magnetic field prior to 400 years ago," said study co-author Dr. Chris Davies. "Since these rapid changes represent some of the …