Appendix A. Monthly North and East coordinates time as resulting from the daily aggregation according to (McCaffrey et al. 2007). For each plot we removed the linear trend according to values reported in Appendix B. The error bars show the 95 per cent confidence interval. Ordinate units are millimetres.

Appendix B. Site code, geodetic coordinates, east and north velocity components referred to a fixed Central Europe frame (Nocquet & Calais 2003) and associated errors (95 per cent of confidence) are reported for all GPS stations included in the processing. For each site, the correlation between the east and north components of velocity (RHO) and the observation history is also reported.

Appendix C. Map showing the grid geometry (in red) used in the strain-rate computation. The velocity field was interpolated at each knot of this grid, which is 0.2° spaced by removing (i) all sites with fewer than 2.5 yr of data (CABA, ISER, PETC and ARCA); (ii) all sites located from Rome to the Bay of Naples (ENAV, FRUL, FORM and LICO) because distant from the rest of the network, and two of them are likely affected by local deformations and (iii) LATT and KROT sites because showing suspicious movements with respect to nearby sites. Black arrows represent observed velocity; white arrows represent the interpolated velocity. The strain-rates were computed at the centre of each grid cell, using the method of Haines et al. (1998).

GJI_5234_sm_Appendix_A.pdf481KSupporting info item
GJI_5234_sm_Appendix_B.pdf16KSupporting info item
GJI_5234_sm_Appendix_C.pdf352KSupporting info item
GJI_5234_sm_SuppMat.doc21KSupporting info item

Please note: Wiley Blackwell is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.