Researchers managed to see under the surface to assess chemical reactions that alter the quality of groundwater.
In proving that Venus is geographically active, scientists are looking to understand why Earth and Venus evolved so differently despite being so similar.
Venus is also covered by clouds of sulfuric acid and has surface temperatures hot enough to melt lead.
The precise topographical map was compiled using ice thickness data from 19 research institutes, dating back to 1967.
Anak Krakatau had been erupting since June, the last eruption just 24 minutes before the tsunami.