“…The RMS error (dimensionless) is defined as:
where N denotes the number of observed data. The convergence condition was that the mean square error between the predicted and observed data converges to a RMS error of 0.02 or the maximum number of iterations of 15 reaches a predetermined value (Su et al.,
2022). The average values of the total magnetic field, inclination, and declination in the study area during the inversion were 36,696.4 nT, −62.371° and −42.5°, respectively, as derived from the IGRF 13th model (Alken et al.,
2021).…”