English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
 Local TagsRelease HistoryDetailsSummary
  Seismic and environmental observations from a North Atlantic seafloor sensor array created from a trans-oceanic submarine cable

Marra, G., Fairweather, D., Kamalov, V., Gaynor, P., Cantono, M., Mulholland, S., Baptie, B., Castellanos, J., Vagenas, G., Gaudron, J.-O., Kronjäger, J., Hill, I., Schioppo, M., Barbeito Edreira, I., Burrows, K., Clivati, C., Calonico, D., Curtis, A. (2023): Seismic and environmental observations from a North Atlantic seafloor sensor array created from a trans-oceanic submarine cable, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4366

Item is

 

show all hide all

Basic

show hide
Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021798 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021798_1
Genre: Conference Paper

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Marra, Giuseppe1, Author
Fairweather, David1, Author
Kamalov, Valey1, Author
Gaynor, Paul1, Author
Cantono, Mattia1, Author
Mulholland, Sean1, Author
Baptie, Brian1, Author
Castellanos, Jorge1, Author
Vagenas, Georgios1, Author
Gaudron, Jacques-Olivier1, Author
Kronjäger, Jochen1, Author
Hill, Ian1, Author
Schioppo, Marco1, Author
Barbeito Edreira, Irene1, Author
Burrows, Kathryn1, Author
Clivati, Cecilia1, Author
Calonico, Davide1, Author
Curtis, Andrew1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

Content

show
hide
Free keywords: -
 Abstract: Optical interferometry can be used to measure the propagation time of the light along fibre optic cables, enabling the detection of environmental perturbations such as earthquake waves as they interact with the fibre [Marra et al., 2018]. However, at any point in time, the measured signal is an integration of the optical path length changes along the entire fibre. This can result in a high measurement noise floor since the ambient noise along the entire length of the seafloor cable is integrated. Over the lengths of thousands of kilometres of transoceanic seafloor cables, this can prevent the detection of smaller magnitude events.We present a novel technique that allows many discrete spans along a single fibre optic cable to be used as individual ocean bottom seismometers. These spans are tens of kilometres long and this reduction in length of each line-receiver allows us to monitor specific locations along the cable path. From an observation window of four months, we show that earthquakes, tides, wave heights and ocean microseisms can all be recorded on individual spans between repeaters on a 5,860 km-long transatlantic cable, in addition to monitoring along the whole cable length.On the continental shelf we observe strong correlations between periodic signals at different frequencies with tides, wave heights and microseisms. In the comparatively quieter deep ocean we have detected two teleseismic earthquakes greater than Mw7. Other enigmatic signals related to ocean tides and the solid Earth’s microseisms are also evident.

Details

show
hide
Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-4366
 Degree: -

Event

show
hide
Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

Legal Case

show

Project information

show

Source 1

show
hide
Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
 Creator(s):
Affiliations:
Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -