This persnickety number determines the strength of magnetic fields. It figures in everything from motors and generators to audio speakers. Oh, and without it we’d live in eternal darkness.

The updated version of the World Magnetic Model was released on Dec. 17, with a new prediction of how the magnetic north pole will shift over the next five years. Here's why it was changed. When you ...

Dan Joling of Anchorage was set to photograph the full moon rising over the Port of Anchorage on Jan. 6. His research told him the moon would pop over the horizon at a certain number of degrees from ...

For centuries, the magnetic north pole steadily tracked along Canada's northern shore. But in recent decades, it has taken a new path, accelerating across the Arctic Ocean toward Russia's Siberia ...

For years, NASA has monitored a strange anomaly in Earth's magnetic field: a giant region of lower magnetic intensity in the skies above the planet, stretching out between South America and southwest ...

NASA has been monitoring a strange anomaly in Earth's magnetic field: a giant region of lower magnetic intensity in the skies above the planet, stretching out between South America and southwest ...