Distributed Acoustic Sensing (DAS) has emerged as a groundbreaking technology in seismology, transforming fiber-optic cables into dense, cost-effective seismic monitoring arrays. DAS makes use of Rayleigh backscattering to detect and measure dynamic strain and vibrations over extended distances. Compared to the traditional monitoring networks using inertial seismometers, the fiber-optic approach can increase the spatial data density by orders of magnitude and enable data. Lab seismologist Gene Ichinose looks over an interrogator, an instrument that allows buried fiber-optic cable to be turned into thousands of virtual seismometers that can be used to measure the ground motion of the Earth and structures. It should significantly augment present seismic networks.
