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1. Can you explain how to properly perform inversion on dinver? When I use boring data (with a depth of 30m) as input parameters in dinver, I only obtain depth results <= 30 m. Can I achieve a target depth > 30 m, for example, 1000 m? How can I do that?

2. How deep can dinver inversion estimate with input data of <=30m depth?

Hi,
What do you mean by boring data up to 30 m? If you invert a dispersion curve (Rayleigh waves), the maximum depth of resolution depends upon various parameters, among them the frequency range of the dispersion curve. There is a rule of thumb that the maximum depth is round one third of the maximum wavelength. Hence to reach 1km, you have to measure the phase velocity at a wavelength of 3000 m, that is, if the phase velocity is at 750 m/s, a minimum frequency of 0.25 Hz.
Best regards,
Marc