Preconditioned Conjugate Gradient Algorithm-Based 2D Waveform Inversion for Shallow-Surface Site Characterization

Table 3

Comparative evaluation of the PCG performance for seismograms with 20% and 50% Gaussian white noise in the complex structure model noise-containing test.

Noise level (%)	Total iterations	Normalized final misfit value	Initial value of RMSE	Final value of RMSE
20	38	0.6725	0.1022	0.0379
50	29	0.8784	0.1022	0.0459