The DAS system is installed at Sandia National Laboratories, NM, USA. The installation was presented and described by Porritt et al., (2022). The system consists of a 152-m long single-mode cable and a Silixa iDAS interrogator unit. The cable is installed variably on the surface, buried at shallow depth (< 1 m), and run through conduit at different segments. See R. W Porritt, A. C. Stanciu, R. E. Abbott, M. G. Baker, M. J. Fleigle, K. M. Hodgkinson and G. W. Slad (2022), Evaluation of Ground Coupling Tests of a Fiber-Optic Cable at the Sandia Facility for Acceptance, Calibration, and Testing for Distributed Acoustic Sensing, 2022 Fall Meeting, AGU, 12-16 Dec