In 1993, Kajima Engineering and Construction Corp. and Agbabian Associates established the Borrego Valley Downhole Array (BVDA) near Borrego Springs, in Southern California. The BVDA site consists of borehole and surface instruments that extend east-west 3000m across the Borrego Valley and a remote rock site at the western edge of the valley that includes surface and borehole sensors. The site was installed to provide information about wave propagation across the alluvial basin generated by the Coyote Creek and Clark Faults.



The UCSB Geotechnical Array monitoring program is funded by the United States Nuclear Regulatory Commission (NRC)  under
Contract# NRC-HQ-60-15-C-0001 Project title: "Observations and Analysis of Geotechnical Array Data"

This site previously funded (2004 to 2014) by the Geoge E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) Program of the National Earthquake Hazards Reduction Program (NEHRP) of the National Science Foundation (NSF) under Award Number CMMI-0927178.