This code performs joint inversion of phase and group velocities applying transdimensional Bayesian inversion. 1-D earth model is parameterized using layer interface model. This code also allows to interact the chains so that faster convergence is achieved. For more details, we refer to the following publications: 1) Pachhai., S., M. Li, M.S. Thorne, J. Dettmer, and H. Tkalcic (2022), Internal structure of ultralow-velicity zones consistent with origin from a basal magma ocean, Nature Geoscience, 15(1), 79-84. 2) Manu-Marfo, D., Aoudia, A., Pachhai, S., and R. Kherchouche (2019), 3D shear wave velocity model of the crust and uppermost mantle beneath the Tyrrhenian basin and margins, Scientific Reports, 9:3609, https://doi.org/10.1038/s41598-019-40510-z. 3) Pachhai, S., J. Dettmer, and H. Tkalčić (2015), Ultra-low velocity zones beneath the Philippine and Tasman Seas revealed by trans-dimensional Bayesian waveform inversion, Geophysical Journal International, 203 (2), 1302-1318, doi:10.1093/gji/ggv368 4) Pachhai, S., H. Tkalčić, and J. Dettmer (2014), Bayesian inference for ultralow velocity zones in the Earth’s lowermost mantle: complex ULVZ beneath the east of Philippines, Journal of Geophysical Research, 11(119), 8346-8365, doi: 10.1002/2014JB011067. 5) Dettmer, J., Molnar, S., Steininger, G., Dosso, S.E. & Cassidy, J.F., 2012. Trans-dimensional inversion of micrometer array dispersion data with hierarchical autoregressive error models, Geophys. J. Int., 188, 719–734 6) Thapa, H.R., S. Pachhai, A. Aoudia, D. Manu-Marfo, K. Priestley, and S. Mitra (2023), Crustal structure and discontinuities beneath the Nepal Himalaya using seismic ambient noise and teleseismic P wave coda autocorrelation, Journal of Geophysical Research,

{"references": ["Pachhai., S., M. Li, M.S. Thorne, J. Dettmer, and H. Tkalcic (2022), Internal structure of ultralow-velicity zones consistent with origin from a basal magma ocean, Nature Geoscience, 15(1), 79-84.", "Manu-Marfo, D., Aoudia, A., Pachhai, S., and R. Kherchouche (2019), 3D shear wave velocity model of the crust and uppermost mantle beneath the Tyrrhenian basin and margins, Scientific Reports, 9:3609, https://doi.org/10.1038/s41598-019-40510-z.", "Pachhai, S., J. Dettmer, and H. Tkal\u010di\u0107 (2015), Ultra-low velocity zones beneath the Philippine and Tasman Seas revealed by trans-dimensional Bayesian waveform inversion, Geophysical Journal International, 203 (2), 1302-1318, doi:10.1093/gji/ggv368", "Pachhai, S., H. Tkal\u010di\u0107, and J. Dettmer (2014), Bayesian inference for ultralow velocity zones in the Earth's lowermost mantle: complex ULVZ beneath the east of Philippines, Journal of Geophysical Research, 11(119), 8346-8365, doi: 10.1002/2014JB011067.", "Dettmer, J., Molnar, S., Steininger, G., Dosso, S.E. & Cassidy, J.F., 2012. Trans-dimensional inversion of micrometer array dispersion data with hierarchical autoregressive error models, Geophys. J. Int., 188, 719\u2013734", "Thapa, H.R., S. Pachhai, A. Aoudia, D. Manu-Marfo, K. Priestley, and S. Mitra (2023), Crustal structure and discontinuities beneath the Nepal Himalaya using seismic ambient noise and teleseismic P wave coda autocorrelation, Journal of Geophysical Research,"]}