One of the more direct methods of gaining hands-on experience in geotechnical engineering is the organization and participation in research expeditions (especially following major earthquake events). In geotechnical (as well as in structural) engineering, observations of performance offer valuable information which, over the years, shape engineering practice and prompt scientific research. Moreover, a unique contribution that often arises through field studies is the revealing of phenomena that had been ignored. It is worth mentioning that in the field of earthquake engineering, most major events (e.g., Northridge, Kobe, Kocaeli, Düzce, Chi-Chi, Niigata-ken Chuetsu) have taught the engineering communities something new both in qualitative and quantitative terms. Information about some of the recent research expeditions can be found in the sub-menu on the left.