The movement or replacement of the antenna or an unexpected natural phenomenon may displace the position
of the CORS reference point. Geophysical processes earthquakes, volcanic activity, etc.
may also produce significant station displacements that should be documented. This information is critical
to CORS users if they want to use CORS data to determine accurate positional coordinates for points of interest to them. When the trend of the 60-day series of daily estimates differ from this station’s adopted positional coordinates
by more than the tolerances described in the preceding paragraph