19 Advances in borehole networks, data, and analyses

Conveners: Seyyit Umit Dikmen , Olga-Joan Ktenidou , Bojana Petrovic , Kyriazis Pitilakis

Oral program  / Thu, 08 Sep, 14:30–17:30  / Room Vulcania 2 Poster program  / Attendance Thu, 08 Sep, 10:30–11:30  / Poster area

The analysis of data recorded by sensors installed in boreholes has yielded important information for numerous applications in the Engineering and Seismological communities. Borehole arrays can help estimate small-strain properties of the shallow layers and also improve our understanding of strong ground motion, including non-linear soil behaviour and material properties, as well as liquefaction phenomena. Strong and weak motion data from depths of a few meters down to a few kilometers can give information on the mechanisms behind site amplification (such as basin-edge and other complex site effects related to the shallow geological structure) and site attenuation (such as anelastic attenuation, Q, and the high-frequency decay parameter, kappa; the latter may also bear on seismological problems such as stress-drop). Downhole arrays are also the best source of data for estimating input ground motion at bedrock level. When combined with arrays installed in nearby buildings, the joint data analysis allows a comprehensive study of wave propagation through the shallow layers and interaction with the building.

This session aims to bring together the Engineering, Seismological, and Geophysical communities and create a platform for discussion and exchange concerning borehole arrays, data, and applications. We welcome contributions from all aspects of borehole data analysis, including, but not limited to: interferometry, material properties in the linear and non-linear range, site response, amplification, and attenuation. We encourage novel and hybrid applications of vertical arrays, including coupled subsurface-and-superstructure arrays. We also seek to hear from those installing new arrays and compiling new datasets and public databases of downhole data, and to discuss exciting new possibilities for applications.