More about earth tides: Check out the Wiki page. Normally we are not too concerned, as it is a regional effect and surveyors tend to measure to nearby control or base-stations. If everything moves by the same amount nobody will know or care. But there are applications where earth tides require consideration. For instance, PPP corrections are applied from global base stations which are corrected for earth tide. So the results from PPP positioning could display earth tide movement, if not corrected for this. Accurate gravity measurements also need to take earth tide into account. Note that in coastal areas there is also an effect of ocean loading which is not considered here.

About the graph: The graph is generated from a Python ported, slightly simplified version of the Fortran code presented here by Dennis Milbert. It is within a cm or so of the solid.exe results.

Terms of use: By using this webpage you agree to the following terms of use. This earth tide graph is indicative only, results are possibly inaccurate or wrong. Topomarine Ltd is not liable for any incidents, damage or any indirect incidental, consequential, special or exemplary damages arising out of the use, performance or access of this earth tide calculation. You indemnify, defend and hold harmless Topomarine Ltd and its personnel from any claim, proceeding, loss, damage, fine, penalty, interest or expense arising out of the use of this web page. If you are interested in professional application of solid earth tides, contact us for more information.