The San Andreas Fault (SAF) in California is a mature plate boundary fault capable of great (magnitude 8 or greater) earthquakes. The southern section of the SAF has not produced a major event in historic times (over the last 300 years), and is currently believed to pose the largest seismic risk in California (Weldon et al., 2005; Field et al., 2014). While much progress was made toward understanding seismic potential of the Southern San Andreas Fault (SSAF) and the likely socio-economic impacts of a large future earthquake on the SSAF, several important questions remain. Over the last decade several lines of evidence emerged suggesting that the 80 km-long Coachella Valley- Bombay Beach segment of the SSAF may not be vertical and may have a substantial dip to the East, similar to a well-recognized SSAF dip in the San Gorgonio bend further to the North.