Electromagnetic Transfer Function Confidence Analysis Evaluated at Usarray Site NDE29

Given the prevalence and intensity of cultural noise and its non-stationary characteristics, the uncertainties associated with estimated magnetotelluric (MT) impedances are crucial for MT interpretation and utilization. Here, we focus on MT impedance confidence interval estimates based on the parametric estimation method. In addition to the standard asymptotic estimates from system identification, we also consider two resampling methods for parametric estimation based on subsampling and moving block bootstrap strategies. We applied these approaches to a representative USArray site and the results show that the resampling based estimates have the potential to obtain more accurate and reliable estimated MT transfer impedances, especially when the data quality is poor.