Magnetic Storm homepage. When an electric current passes through a metal wire, a magnetic field forms around that wire (see diagram at right).

This diagram shows the location of the north magnetic pole (white point) and the magnetic declination (contour interval 2 degrees) at the beginning of 2019. The Earth’s magnetic field is known ...

When CMEs collide with the Earth's atmosphere and magnetic field, they can trigger geomagnetic storms. ... An NOAA G1 geomagnetic storm watch diagram for July 17-18, 2023.