Distributed Acoustic Sensing in the Puget Sound and Puget Lowlands, Washington, 
USA

Lipovsky, Bradley; Elgueta, Veronica; Ni, Yiyu; Denolle, Marine; Winebrenner, Dale; Holberg, Leo; Zumberge, Mark

doi:10.57757/IUGG23-5012

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Conference Paper

Distributed Acoustic Sensing in the Puget Sound and Puget Lowlands, Washington, USA

Authors

Lipovsky, Bradley
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Elgueta, Veronica
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Ni, Yiyu
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Denolle, Marine
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Winebrenner, Dale
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Holberg, Leo
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Zumberge, Mark
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

External Ressource

No external resources are shared

Fulltext (public)

There are no public fulltexts stored in GFZpublic

Supplementary Material (public)

There is no public supplementary material available

Citation

Lipovsky, B., Elgueta, V., Ni, Y., Denolle, M., Winebrenner, D., Holberg, L., Zumberge, M. (2023): Distributed Acoustic Sensing in the Puget Sound and Puget Lowlands, Washington, USA, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-5012

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021411

Abstract

The recent democratization of optical fiber geophysics opens new inroads to explore complex and difficult-to-access wave propagation environments. Here, we present an analysis of one year of continuous Distributed Acoustic Sensing (DAS) data recorded along two optical fiber cables located in the Puget Sound and Puget Lowlands, Washington, USA. The first cable is 12 km long and includes a 4 km long subsea component (average ~100 m water depth) and the second cable is 30 km long in an urban to suburban setting. Both DAS deployments make use of a Sintela Onyx interrogator. During the observation time, interrogators on both fibers observe local, regional, and teleseismic earthquakes. We find that the overall detection threshold for our terrestrial DAS observations is equal to and in some cases slightly better than the urban seismometers of the Pacific Northwest Seismic Network (PNSN). In addition to DAS, we present concurrent Ultrastable Laser Interferometry (ULI) observations on fiber in the same cable as one used for DAS. Distant teleseismic earthquakes provide a means to compare DAS and ULI strain measurements and yield strain correlation coefficients greater than .95. Regional earthquakes generate subsea Scholte waves and thereby enable a lower detection threshold than PNSN stations. A fiber running through the city of Seattle is used to map the spatial variability of engineering site parameters such as VS30. These results point the way to several areas of progress in understanding earthquake hazard including using optical fiber geophysics.