Interpretation rule
ground-motion-egms-within
When it applies
Source class
V_WITHIN
The rule fires when the named source publishes this class for the point being asked about. Until the source does, TerraOverview adds nothing.
TerraOverview interpretation: no vertical motion beyond the measurement uncertainty
In the 100 metre cell that contains the point, the vertical mean velocity EGMS reports is within twice the uncertainty, that is the larger of the standard deviation published for the cell and the 0.7 mm/year EGMS states as the product specification: the measurement cannot tell a movement from zero, which does not rule out smaller movements. The threshold is TerraOverview’s choice.