TY - JOUR
T1 - Estimating Rayleigh surface wave from ambient noise recorded by Distributed Acoustic Sensing (DAS) dark fiber array in the city
AU - Czarny, Rafał
AU - Zhu, Tieyuan
N1 - Funding Information:
The Penn State FORESEE array was supported by Penn State Institute of Environment and Energy seed grant and Institute of Natural Gas Research.
Publisher Copyright:
© 2022 Society of Exploration Geophysicists and the American Association of Petroleum Geologists.
PY - 2022/8/15
Y1 - 2022/8/15
N2 - We present the processing workflow of estimating stable, good-quality Rayleigh surface waves from ambient noise recorded by the Distributed Acoustic Sensing (DAS) dark fiber array inside the city. Our example concerns a 660-m long telecom fiber line as a part of the Penn State Fiber-Optic For Environment Sensing (FORESEE) array. We process a month of continuous data with the seismic interferometry method. We focus on traffic noise which dominates in urban areas. In comparison to a standard ambient noise interferometry strategy, we added frequency-wavenumber wavefield separation before cross-correlation. We analyze the quality of every virtual shot gathers (VSGs) retrieved along with the DAS profile. It tuned out that high quality VSGs are those with virtual source points located near the obstacle on the road (bumps, joints, manholes) and some intersections. Eventually, we stack selected 5 best quality VSGs for both positive and negative wavenumbers according to the offset. Multi-mode Rayleigh surface wave with the broadband response from few Hz up to 40 Hz gives us the ability to reconstruct the 1-D S-wave velocity model. The quality of the estimated wave is promising in terms of monitoring small velocity changes due to external impact, e.g., water table variations.
AB - We present the processing workflow of estimating stable, good-quality Rayleigh surface waves from ambient noise recorded by the Distributed Acoustic Sensing (DAS) dark fiber array inside the city. Our example concerns a 660-m long telecom fiber line as a part of the Penn State Fiber-Optic For Environment Sensing (FORESEE) array. We process a month of continuous data with the seismic interferometry method. We focus on traffic noise which dominates in urban areas. In comparison to a standard ambient noise interferometry strategy, we added frequency-wavenumber wavefield separation before cross-correlation. We analyze the quality of every virtual shot gathers (VSGs) retrieved along with the DAS profile. It tuned out that high quality VSGs are those with virtual source points located near the obstacle on the road (bumps, joints, manholes) and some intersections. Eventually, we stack selected 5 best quality VSGs for both positive and negative wavenumbers according to the offset. Multi-mode Rayleigh surface wave with the broadband response from few Hz up to 40 Hz gives us the ability to reconstruct the 1-D S-wave velocity model. The quality of the estimated wave is promising in terms of monitoring small velocity changes due to external impact, e.g., water table variations.
UR - http://www.scopus.com/inward/record.url?scp=85146702750&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85146702750&partnerID=8YFLogxK
U2 - 10.1190/image2022-3750564.1
DO - 10.1190/image2022-3750564.1
M3 - Conference article
AN - SCOPUS:85146702750
SN - 1052-3812
VL - 2022-August
SP - 2133
EP - 2137
JO - SEG Technical Program Expanded Abstracts
JF - SEG Technical Program Expanded Abstracts
T2 - 2nd International Meeting for Applied Geoscience and Energy, IMAGE 2022
Y2 - 28 August 2022 through 1 September 2022
ER -