Overview and general recommendation

This paper provides an InSAR Kinematic Modelling based on a reliable and widely used approach(TDEFNODE). As reported by the authors, this model has been applied in the study zone but is limited to GPS/GNSS data. The relevant point is the joint inversion of GNSS and InSAR velocities.  The authors present all the expected elements for a manuscript like this. After a detailed review of the manuscript, I consider the paper suitable for publication, but it will require minor corrections, as outlined in the following comments.

General comments:

The abstract, introduction, data and methodology, strain rate field, kinematic results, discussion, and conclusions are generally well written; however, minor comments are outlined in the next section as suggestions for the authors' consideration. In my view, probably, the inversion strategy is one of the most interesting contributions of this paper. However, I note a lack of revision of similar joint inversion strategies by other authors (e.g.). Wu et al.  https://doi.org/10.1029/2023GL106143.

Minor comments:

Please see the attached PDF.

This study uses GNSS and InSAR data to examine the deformation at the triple junction where the Cocos, North American, and Caribbean plates meet. The kinematic block model results for El Salvador are particularly interesting for this complex region as they also identify the distribution of the different zones of coupling. As the results are consistent with most of the data, presenting a new kinematic block model for El Salvador is useful for understanding the region. The work appears to be well executed and I have no specific comments.

Just two minor comments:

1. Could you please highlight the Forearc Sliver (FORE) in Figure 1, perhaps by coloring it differently, even if its borders are not be well defined?

1. You terminated your IPAL block until 91.8°W. However, based on seismicity, Legrand et al. (2025) have suggested that the Japaltagua fault may extend westwards to the Tacana volcano (at ~92.1°W), with the triple junction located close to this volcano (the first of the CAVA). Could you discuss this hypothesis? You decided to place the triple junction further to the east. Why?

Legrand D., Perton M., Spica Z., Jon J., Alatorre M., Peiffer L., Campion R., Valdés C., Caballero-Jiménez G., Vargas-Zamudio K., Espíndola J.M., De la Cruz-Reyna S., 2025: The Magma plumbing system and seismo-tectonics of the Guatemala-Mexico triple junction as revealed by the seismicity of the Tacaná volcano before and after the 2017 Mw8.2 Chiapas earthquake. Geophysical Journal International, 242, 1-14, https://doi.org/10.1093/gji/ggaf167