Enhanced Global Seismic Resolution Using Transoceanic SMART Cables

Ranasinghe, N. R.; Rowe, C. A.; Syracuse, E. M.; Larmat, Carène; Begnaud, M. L.

doi:10.1785/0220170068

Cited by 13 publications

(12 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We compare ray coverage for these sources using the existing GSN (left) with that possible with these notional SMART cables (right). Full global forward modeling using 20 years of earthquakes demonstrates over 300% improvement in some suboceanic regions, where SMART cables would be deployed (Ranasinghe et al, 2018). This improved coverage will facilitate higher-fidelity 3D global models of both seismic wave speeds and attenuation, improving insight into the physical properties of the Earth mantle beneath the oceans and thus enabling better understanding of geodynamic processes.…”

Section: Seismologymentioning

confidence: 99%

“…Left: sampling of the Earth using today's GSN (blue circles). Right: greater sampling afforded by addition of notional SMART cables, with 75-km sensor spacing (green circles; Ranasinghe et al, 2018). Permission obtained for use of figure. and then, by applying tomographic analysis at a much smaller scale than described above estimate the material properties in the forearc.…”

Section: Seismologymentioning

confidence: 99%

See 1 more Smart Citation

SMART Cables for Observing the Global Ocean: Science and Implementation

et al. 2019

View full text Add to dashboard Cite

The ocean is key to understanding societal threats including climate change, sea level rise, ocean warming, tsunamis, and earthquakes. Because the ocean is difficult and costly to monitor, we lack fundamental data needed to adequately model, understand, and address these threats. One solution is to integrate sensors into future undersea telecommunications cables. This is the mission of the SMART subsea cables initiative (Science Monitoring And Reliable Telecommunications). SMART sensors would "piggyback" on the power and communications infrastructure of a million kilometers of undersea fiber optic cable and thousands of repeaters, creating the potential for seafloor-based global ocean observing at a modest incremental cost. Initial sensors would measure temperature, pressure, and seismic acceleration. The resulting data would address two critical scientific and societal issues: the longterm need for sustained climate-quality data from the under-sampled ocean (e.g., deep ocean temperature, sea level, and circulation), and the near-term need for improvements to global tsunami warning networks. A Joint Task Force (JTF) led by three UN agencies (ITU/WMO/UNESCO-IOC) is working to bring this initiative to fruition. This paper explores the ocean science and early warning improvements available

show abstract

Section: Seismologymentioning

confidence: 99%

Section: Seismologymentioning

confidence: 99%

SMART Cables for Observing the Global Ocean: Science and Implementation

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Over the normal one-or two-decade refresh cycle for such systems, global coverage could be built up. If industry and government would instrument their fiberoptic cables with BPRs and accelerometers, particularly in locations important for tsunami detection, it would greatly improve the world's ability to rapidly detect and measure tsunamis (Butler et al, 2014;Barnes et al, 2016;Ranasinghe et al, 2017;Barnes, 2018). Figure 5 illustrates the proximity of existing cable networks to tsunami source areas and existing tsunameters.…”

Section: Cabled Observation Systemsmentioning

confidence: 99%

Ocean Observations Required to Minimize Uncertainty in Global Tsunami Forecasts, Warnings, and Emergency Response

Angove

Arcas

Bailey³

et al. 2019

Front. Mar. Sci.

View full text Add to dashboard Cite

Reducing Tsunami Forecast and Warning Uncertainty other emerging techniques, and state-of-the-art modeling and computational resources, these capabilities will enable more timely and accurate tsunami detection, measurement, and forecasts. Because of these advances in detection and measurement, the opportunity exists to greatly reduce and/or quantify uncertainties associated with forecasting tsunamis. Providing more timely and accurate information related to tsunami location, arrival time, height, inundation, and duration would improve public trust and confidence and fundamentally alter tsunami emergency response. Additionally, this capability could be integrated with related fields (e.g., storm surge, sea-level rise, tide predictions, and ocean forecasting) to develop and deploy one continuous, real-time, accurate depiction of the always moving boundary that separates ocean from coast and, sometimes, life from death.

show abstract

“…Nowadays hundreds of pairs of PG&OBS are in operation. Thousands of similar measuring systems will be deployed in the near future (Tilmann et al, 2017;Ranasinghe et al, 2018). One should expect some human errors in calibration of ocean-bottom sensors.…”

Section: Introductionmentioning

confidence: 99%

Approbation of the Method for Examining the Performance of Seafloor Observatory Sensors Using Distant Earthquakes Records

et al. 2021

View full text Add to dashboard Cite

An algorithm is presented for testing the calibration accuracy of both z-accelerometers and pressure gauges (PG) installed in seafloor observatories. The test is based on the linear relationship between the vertical acceleration component of the seafloor movement and variations of the seafloor pressure, which is a direct consequence of Newton's 2-nd law and holds valid in the frequency range of “forced oscillations.” The operability of the algorithm is demonstrated using signals registered by 28 observatories of the DONET-2 system during 4 earthquakes of magnitude Mw ~ 8 that took place in 2018-2019 at epicentral distances from 55° up to 140°.

show abstract

Enhanced Global Seismic Resolution Using Transoceanic SMART Cables

Cited by 13 publications

References 33 publications

SMART Cables for Observing the Global Ocean: Science and Implementation

SMART Cables for Observing the Global Ocean: Science and Implementation

Ocean Observations Required to Minimize Uncertainty in Global Tsunami Forecasts, Warnings, and Emergency Response

Approbation of the Method for Examining the Performance of Seafloor Observatory Sensors Using Distant Earthquakes Records

Contact Info

Product

Resources

About