Initial source and site characterization studies for the U.C. Santa Barbara campus

Strong Earthquake Motion Estimates for the UCSB Campus, and Related Response of the Engineering 1 Building

“…The Phase 1 studies were completed in 1997, and are reported in detail in Archuleta et al, 1997. The main results are summarized below.…”

“…The primary seismic hazard to UCSB, however, originates from a series of local active faults. Among these faults, the North Channel-Pitas Point (NCPP) fault is believed to be the main controlling structure for producing strong-ground motion at UCSB, because of its size, proximity, and inferred slip rate and because it likely extends directly beneath the campus (Archuleta, et al, 1997). The NCPP fault is imaged in 2-D and 3-D seismic surveys as a blind thrust that terminates about 1.5 km below the seafloor and dips 20 0 -40 0 to the north.…”

“…The recurrence interval (RI) for a NCPP event was originally given as 300 to 1,500 years in the UCSB Phase 1 report (Archuleta et al, 1997), as shown in (Petersen at al, 1996) to 3mm/year (Kamerling and Sorlien, 1999) the RI is estimated to be in the range of 350 to 525 years.…”