Past Earthquakes in Continental Settings—A Geomorphologic Perspective
摘要
This chapter addresses the measurement of displaced geomorphic landforms to constrain the along-fault distribution of surface displacement from individual earthquakes and their recurrence. This line of work is motivated by the desire to constrain the size and other characteristics of past earthquakes to permit estimates of a fault’s likely future behavior to further improve seismic hazard assessment. For a number of reasons, discussed in this chapter, taking such measurements is not trivial. With this chapter, we want to outline why such measurements are important, what data sets are used to take them, how measurements can be taken and what assumptions are adopted to take those measurements. We also provide our recommendations for taking such offset measurements as well as a conceptual model for earthquake recurrence, based on findings from numerous researchers over the last few decades.