John A. Fleming

John A. Fleming was an influential British geophysicist known for his work in geomagnetism, particularly in understanding Earth's magnetic field. He developed key theories on how the magnetic field interacts with solar winds and cosmic radiation. Fleming invented the fluxgate magnetometer, an instrument that measures magnetic fields with high precision, aiding in the study of Earth’s magnetism and its effects on navigation, communication, and space weather. His contributions have significantly advanced our knowledge of geomagnetic phenomena and their importance to both science and technology.