Disaster mitigation

[DM-11] Development of international standard for array measurement of microtremors to estimate shear wave velocity profile

*Seiji Tsuno¹, Chisato Konishi², Shigeki Senna³, Christophe Vergniault⁴, Jørgen Johansson⁵, Mats Svensson⁶, Romans Arhipenko⁷ (1. Railway Technical Research Institute (Japan), 2. OYO Corporation (Japan), 3. National Research Institute for Earth Science and Disaster Resilience (Japan), 4. Électricité de France (France), 5. Norwegian Geotechnical Institute (Norway), 6. Tyréns (Sweden), 7. Borealis (Latvia))

Recently, the development of international standard on geophysical techniques has been discussed in ISO (International Organization for Standardization) /TC 182 (Geotechnics) / WG 9 (Geotechnical aspects of geophysical methods). In the WG 9, an international standard providing specifications of equipment and survey procedure of array measurement of microtremors which is one of the non-destructive testing methods with an array of sensors deployed on the ground surface, and data analysis of array records of microtremors (e.g. EAGE [2014]; Foti et al. [2017]) has been developing. The standard is intended for use by administrators of infrastructure facilities, building constructors, house builders, consultants, academia, and public/private research institutions to measure and evaluate soil structure and geotechnical site characteristics, with a view to contributing to various engineering fields. The international standard “array measurement of microtremors to estimate shear wave velocity profile” focuses on the array measurement of microtremors using vertical ground vibration to estimate an S-wave velocity profile by processing microtremor records as fundamental mode of Rayleigh waves. The document specifies requirements for equipment, survey procedure, data analysis, and reporting of array measurement of microtremors.

This paper reports the outline of the international standard “array measurement of microtremors to estimate shear wave velocity profile” under development.