Dark Fiber & Distributed Acoustic Sensing

Wednesday, April 11th, 2018 at 6:30 PM

TI Auditorium


6:30 - 7:00 PM Networking & Refreshments
7:00 - 8:00 PM Talks
8:00 - 8:30 PM Panel Session
8:30 - 8:45 PM Speaker Appreciation & Adjournment


Please register to help us estimate attendance.
The event is free, refreshments are $5.
Chair: MP Divakar
Organizer: MP Divakar

Session Abstract:Coming Soon

Speaker: Shan Dou

Bio: Shan Dou (PhD) is a research scientist at Feasible Inc. and a guest scientist at the Lawrence Berkeley National Laboratory (the Berkeley Lab). Throughout her work at the Berkeley Lab, Shan has been at the forefront of bringing fiber-optics distributed acoustic sensing (DAS) into key application areas including traffic-noise-based seismic imaging and earthquake sensing. Shan holds a PhD in seismology (University of California, Berkeley) and a BS in geophysics (University of Science and Technology of China).

Title: Telecommunication fiber-optics cables as dense seismic arraysa tale of dark fiber

Abstract: Recent advent of distributed acoustic sensing (DAS) technologies have transformed telecommunication fiber-optic cables into dense arrays of seismic sensors. As a result, dark fiber, the redundantly installed, currently unused telecommunication fiber, could be repurposed into massive seismic arrays. In this talk, Shan Dou will present the latest results obtained from the Lawrence Berkeley National Laboratory's FOSSA (fiber-optics Sacramento seismic array) experiment. The experiment uses a 13-mile-long dark fiber section (part of the ESnet testbed) to record both natural earthquakes and traffic noise that are needed for near-surface seismic imaging. Despite being installed entirely for telecommunication purposes, these dark fibers are effective in recording both earthquake signals and traffic noise, hence making fiber optics a powerful enabler in seismic applications ranging from earthquake early warnings to seismic imaging of ground water levels.