We performed an experiment to examine the relationship between magnetization, polarizing field time, magnetic field and precession frequency using a 125 mL sample of water and the TeachSpin Earth’s Field NMR instrument. Through varying thee different parameters, we could determine the Larmor precession frequency of protons within Earth’s field, spin-lattice relaxation time, and the gyromagnetic ratio for protons. We found the Larmor precession frequency to be \(1852\pm18~Hz\), the spin-lattice relaxation time to be \(2.15\pm0.05~s\), and the gyromagnetic ratio to be \((2.65\pm0.04) \cdot 10^8~\frac{1}{s\cdot T}\), agreeing with the known value of \(2.68\cdot 10^8~\frac{1}{s\cdot T}\).