Distributed Acoustic Sensing (DAS) can transform the already existing underground network of fiber-optic cables essential to modern life as arrays of thousands of seismometers with a measurement density on the order of meters and so, in a cost-effective way. DAS relies on coherent optical time-domain reflectometry to precisely measure the amplitude and phase of vibrations along a fiber. This new type of data for seismologists is offering many new opportunities for research. We want to explore its potential for ultra-high resolution imaging, microzonation in urban areas, and possibly for landslide and volcano monitoring. For more information about this technique, check out the video at the bottom of this page.
- Spica Z., Nishida K., Akuhara T., Pétrélis F., Shinohara M., Yamada Y., Marine Sediment Characterized by Ocean-Bottom Fiber-Optic Seismology, Geophysical Research Letters, 2020, doi: 10.1029/2020GL088360. Paper
- Spica Z., Perton M., Martin E., Beroza G., Biondi B., Urban Seismic Site Characterization by Fiber-Optic Seismology, 2020, Journal of Geophysical Research (Solid Earth), doi:10.1029/2019JB018656. Paper
- Lellouch A., Yuan S., Spica Z., Biondi B., and Ellsworth W. L., Seismic velocity estimation using passive downhole distributed acoustic sensing records – examples from the San Andreas Fault Observatory at Depth, 2019, Journal of Geophysical Research (Solid Earth), doi:10.1029/2019JB017533. Paper