The 4th ESG International Symposium will address current issues in earthquake ground motion prediction with an emphasis on the effects of surface geology on seismic motion. ESG4 will present recent studies, with an emphasis on advances in research since 2006 and data obtained from recent significant earthquakes, and will help to guide future research on the effects of surface geology on seismic motion.

NEES Workshop: Using the NEES Equipment Site Facilities in ESG Research

Participating NEES Equipment Sites:

• UCSB
• UCLA

Special Session on the Vs30 Debate:

How We Can and Cannot Use Vs30 in Site Response Estimation

• Session Chair: Alan Yong
• Moderator: Jon Stewart

Papers were submitted to the Symposium on the following topics:

• Strong motion data and processing techniques
• Nonlinearity in soils
• Liquefaction
• Microtremor techniques
• Site surveys
• Numerical simulations
• Empirical estimates of ground motion
• Case studies of ground motion
• Borehole array studies
• Vs30 and other predictors of site response for seismic hazard
• General site response