Dear authors,

One of the referees sent their comments back and although you have addressed most of their concerns, there are still several points that need to be accounted for or explained, which is why I marked your submission as needing major revision (and there is no "moderate revision" option). I would like to carefully review and respond to these before I can make a final decision on your paper:
(1) You have not explained your choice of measuring group velocities instead of phase velocities. There isn't much advantage I can see to use group velocities in this case since you do not have to worry about the source function.
(2) The white blanks in Fig. S5 and in Fig. 8 are worrisome. Please, check what caused them and whether the inversions need to be rerun with different damping as suggested by the reviewer.
(3) reference to Barmin et al., 2001, 2012 are missing

I will add to the reviewer's comments the following:
(1) there should be a discussion of the effect of regularization on the inversion and how it may affect the anisotropy discussion. As you know, if the damping on the Love or the Rayleigh inversion were to be changed, the effect on the model may strongly affect the anisotropy results.
(2) FTA is usually called FTAN in the literature. Please, change it everywhere in the text for consistency (with publications made over several decades).

Thank you for taking the time to address all remaining comments. I will now recommend it for publication.

Dear Authors,

based on the Topical Editor's report and overall assessment of the review process, I am pleased to accept your manuscript for publication in Solid Earth.

Many thanks for choosing Solid Earth as a platform for publishing your research.

Sincerely,

Federico Rossetti