Maps of the 3 sub-networks used for the GAMIT processing. All stations are not present at every epochs, stations represented in pink did not send data for more than 2 years (either permanently decommissionned or temporary out of commission). On maps of sub-networks CHL1 and CHL2, stations commons to several sub-networks are highlighted by 2 different size circles. The network CHIL used for the processing until 2009 is not represented here. Stations highlighted by the orange frame are the one which time series are presented throughout the article.