To measure this local field strength, the first item needed is a working compass. With the compass aligned to north, a magnet is placed with its poles aligned at a right angle to the compass.

A combination of a dynamo-generated magnetic field and massive impacts could explain the highly magnetized rocks in some ...

Therefore, the sample offers the first solid measure of not only the strength of Earth's ancient magnetic field, but also of the timing of when the magnetic field originally appeared. Breaking ...

Depending on the object's shape, its centre of mass can be inside or outside it. Gravitational field strength (g) is measured in newtons per kilogram (N/kg). The Earth's gravitational field ...

(Courtesy: Juan Eugenio Iglesias) Portable, low-field-strength MRI systems have the potential to transform neuroimaging – provided that their low spatial resolution and low signal-to-noise (SNR) ratio ...