Global Vs30 Map Server
It is possible that you have found a bug. The only known bug affects dragging the rectangle in Firefox. If you think your issue is a bug in our code, please let us know.
The results of past calculations are stored in a table near the bottom of the page. Subsequent calculations will be appended to this table until you reload or leave the page.
Most likely, you forgot to set a parameter. All of the inputs on the page are required. You must select at least one output type.