Yamada et al. (2009) collected recorded ground motions from the near-source region of large earthquakes that occurred before 2005 and investigated to what extent this historical record could provide a basis for estimating future ground motions at similar sites. Their main conclusion, which they refer to as a paradox, is that the largest peak ground acceleration (PGA) observed in the past can be considered representative of future ground motions with the largest PGA (even though at present earth scientists cannot reliably simulate PGA values by means of numerical models). In contrast to this, the largest peak ground displacement (PGD) observed...

First Page Preview

First page PDF preview
You do not currently have access to this article.