TT12D:
Distributed Fiber-Optic Seismology in Theory and Practice


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Session ID#: 50246

Session Description:
Over the past decade, fiber-optic Distributed Acoustic Sensing (DAS) has become increasingly common in energy applications as a low-cost-per-sensor option for dense, permanent seismic monitoring. Researchers are beginning to explore how DAS could be used to solve basic and applied science questions, including problems related to earthquake detection, location and early warning, near surface geotechnics and infrastructure, hydrogeology and cryosphere. However, presently there is a lack of review papers or tutorials with specific-enough information for new users getting started with DAS. We aim to fill this gap, addressing the following questions: When and how is DAS advantageous? What are the limitations? Quantitatively, what is being measured? How do recording settings affect data fidelity at each frequency? What are existing methods for installing downhole and surface arrays, and what are their cost and quality tradeoffs? How do active source and earthquake recordings compare to seismometers? What signal is extracted from ambient noise interferometry of DAS data? This tutorial aims to enable more scientists to ask whether their applications might benefit from this type of dense, permanent seismic monitoring. Further, we will propose a list of open questions and several applications for which DAS has not been tested to our knowledge.
Primary Presenter:  Eileen Rose Martin, Virginia Polytechnic Institute and State University, Department of Mathematics & CMDA Division, Blacksburg, VA, United States; Lawrence Berkeley National Laboratory, Berkeley, CA, United States
Presenter:  Eileen Rose Martin, Virginia Polytechnic Institute and State University, Department of Mathematics & CMDA Division, Blacksburg, VA, United States; Lawrence Berkeley National Laboratory, Berkeley, CA, United States

Cross-Listed:
  • C - Cryosphere
  • EP - Earth and Planetary Surface Processes
  • NS - Near Surface Geophysics
  • S - Seismology
Index Terms:

7212 Earthquake ground motions and engineering seismology [SEISMOLOGY]
7294 Seismic instruments and networks [SEISMOLOGY]

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