Quality over quantity: on workflow and model space exploration of 3D inversion of MT data

Earth, Planets and Space

Table 2 Results of covariance testing

Cov	RMS	RMS\(_{\text{var}}\)	KSU	No. of iterations	B/U RMS	B/U no. of iterations
0.1	2.17	14.9	4.9	137	1.6	194
0.2	1.53	12.5	7.1	196	1.47	240
0.2 smoothed once	1.76	6.5	14.8	180	1.86	169
0.3	1.6	9.7	6.9	192	1.61	167
0.4	1.75	8.14	5.3	147	1.69	198
0.5	1.97	8.0	5.8	162	1.83	180
0.75	3.86	22.7	6.6	184	4	189
0.4 to 10 km then 0.2	1.76	12.5	6.6	180	1.61	175

Covariance vs. overall RMS model fit (column 2) and RMS\(_{\text{var}}\) (column 3), the number of KSU per iteration (column 4) and number of iterations to converge (column 5) and the overall RMS misfit for the same model when the ocean is not locked (B/U= bathymetry unlocked, column 6) and the number of iterations taken to converge when the ocean is not locked (column 7)