Permanently Instrumented Field Sites
The NEES@UCSB facility consists of permanently instrumented geotechnical test sites designed to improve our understanding of the effects of surface geology on strong ground motion. The instrumentation at these sites includes surface and borehole arrays of accelerometers and pore pressure transducers designed to record strong ground motions, excess pore pressure generation and liquefaction that occurs during large earthquakes. An instrumented structure is also monitored to improve our understanding of soil-foundation-structure interaction (SFSI) effects.
Wildlife Refuge Liquefaction Field Site
Located in the Imperial Valley of Southern California within the Imperial Wildlife Management Area,the Wildlife Liquefaction Array is a fully instrumented site in an area that has historically produced significant ground motion and liquefaction effects. more
Garner Valley SFSI Field Site
The Garner Valley Array is a thoroughly characterized strong motion monitoring site with surface accelerometers, borehole pore pressure transducers and accelerometers, and an extensively instrumented Soil Foundation Structure Interaction (SFSI) test facility. The Garner Valley array records earthquakes on a daily basis, and is also used in active testing experiments. more
Earthquake Engineers and Researchers
Graduate Students
Students and Educators
Public Science InitiativesNews:
Students from UCLA and UCSD attending the summer Research Experiences for Undergraduates (REU) are briefed on the seismicity
of the Garner Valley located near both the San Andreas and San Jacinto faults.
Highlights Movie
Data from the these three other sites shown below have been integrated into the NEES@UCSB data processing.
Borrego Valley Downhole Array
The Borrego Valley field site (BVDA), located near Borrego Springs in southern California, has four borehole instruments at varying depths, and fifteen surface instruments. more
Hollister Downhole Array
The Hollister Earthquake Observatory (HEO) is located near the cities of Hollister and Salinas, in central California. It is located about 10 kilometers from the San Andreas fault, and consists of a vertical array of six accelerometers, and three other accelerometers at a remote site. more
Alaska Delaney Park Array
The array at Delaney Park has six boreholes and monitors the historically seismologically active area of downtown Anchorage, Alaska. more
