Prediction Central, or the Laboratory of Theoretical Geochemistry, was the laboratory of Prof. Harold C. Helgeson at UC Berkeley. The geochemical community lost a great leader with the passing of Prof. Helgeson in May 2007. In memoriam.

On this site you will find a bibliography of publications of H. C. Helgeson, with full abstracts and external links. The software packages SUPCRT and OBIGT are also available here together with an updated thermodynamic database. There is also a list of alumni and photos of lab groups through the years.