Chapman's main area of research was the Earth's magnetic field and for his work in this area he was elected to the Royal Society in 1919, and awarded the Society's Copley Medal in 1966:
Magtitingi ng pangunahing lugar ng pananaliksik ay ang Earth's batubalani field at para sa kanyang trabaho sa lugar na ito siya ay elected sa Royal Society sa 1919, at iginawad ang Kapisanan ng Copley medalya sa 1966: