Relative Motion between St. Croix and the Puerto Rico-Northern Virgin Islands Block Derived from Continuous GPS Observations (1995–2014)

Figure 3

Long-term daily positional time series of CRO1 (1995–2014) and VIKH (2006–2014) referred to the local reference frame SPRNVIRF. CRO1 and VIKH are located on the St. Croix island. The distance between these two GPS stations is 23 km. The linear regression result of the velocity for each positional time series is marked on each subplot. indicates the velocity (slope) of the site within the SPRNVIRF. represents the standard error. Statistically, there is a 95% possibility that the true velocity will be located within the range from to .