Suitability of Open-Ocean Instrumentation for Use in Near-Field Tsunami Early Warning Along Seismically Active Subduction Zones

Williamson, A.; Newman, A. V.

doi:10.1007/s00024-018-1898-6

Cited by 19 publications

(21 citation statements)

References 55 publications

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“…Additionally, for the particular case of Chile, the location of existing DART buoys in the area of interest requires observation times longer than those studied herein (Williamson and Newman 2019).…”

Section: Implementation Of Inversion Algorithmmentioning

confidence: 99%

“…For near-field tsunami forecasting, on the other hand, the lapse between tsunami generation and arrival may be too short to perform tsunami source evaluations and forward simulations. Williamson and Newman (2019) show that, in some places, first arrival can occur in as little as 5 min. In the field, Aránguiz et al (2016) reported arrivals in less than 8 min for the M w 8:4 Illapel event, based on anecdotal evidence.…”

Section: Introductionmentioning

confidence: 95%

“…Hence, offshore tsunami data from tsunameters such as OBPSs seem to be most appropriate for tsunami early warning systems. Williamson and Newman (2019) analyzed the possible coastal locations where sensors can provide a meaningful lead time for near-field tsunamis. These locations concentrate along narrow bands that run roughly parallel to subduction zones.…”

Section: Introductionmentioning

confidence: 99%

“…The number and placement of tsunameters have been based on expert judgment, considering technical aspects such as the variability and location of seismic sources (Schindelé et al 2008), travel time (Schindelé et al 2008;Omira et al 2009;Williamson and Newman 2019), financial factors, for instance pertaining to installation or operation costs (Araki et al 2008), and legal aspects, such as geographic boundaries or legal jurisdictions (Abe and Imamura 2013), among others. Regarding the construction of a sensor array, prior research indicates that two to four observation stations are capable of constraining the source parameters quite well if the stations are optimally located relative to the main tsunami energy beam, whereas adding more data does not significantly improve the inversion results (e.g., Percival et al 2011;An et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the relative distance between sensors and between sensors and the source will be constrained by the tsunami travel time and the duration of the tsunami record to be used in the inversion (e.g., Bernard et al 2001). Hence, given an earthquake, it is possible to define an area (henceforth termed the influence area A l ) over which the tsunami waves have already propagated away from the source and allow for sufficient data to be collected (e.g., Williamson and Newman 2019). A minimum of two sensors must be considered inside this area.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A Multiple-Parameter Methodology for Placement of Tsunami Sensor Networks

Meza

Catalán

Tsushima

2019

Pure Appl. Geophys.

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A methodology to optimize the design of an offshore tsunami network array is presented, allowing determination of the placement of sensors to be used in a tsunami early warning system framework. The method improves on previous sensor location methods by integrating three commonly used tsunami forecast performance indicators as a measure of the predictive accuracy through a single cost function. The joint use of different tsunami parameters allows for a network that is less subject to bias found when using a single parameter. The resulting network performance was tested using a set of synthetic target scenarios and also verified against a model of the 2014 Pisagua event, suggesting that having such a network in place could have provided meaningful information for the hazard assessment. The small number of sensors required (three spanning nearly 700 km of the Northern Chile coast) may be useful in implementing such networks in places where funding of denser arrays is difficult.

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Section: Implementation Of Inversion Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Multiple-Parameter Methodology for Placement of Tsunami Sensor Networks

Meza

Catalán

Tsushima

2019

Pure Appl. Geophys.

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Introduction to “Twenty Five Years of Modern Tsunami Science Following the 1992 Nicaragua and Flores Island Tsunamis, Volume I”

Kânoğlu

Tanioka

Okal

et al. 2019

Pure Appl. Geophys.

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Improving Efficacy of Tsunami Warnings Along the West Coast of the United States

Williamson

Allen

2023

Pure Appl. Geophys.

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Tsunamis cause significant damage and loss of life, particularly for the nearest communities, where the tsunami may arrive in minutes. These local communities often do not receive an informed or timely alert under traditional warning pathways. In response, numerous tsunami early warning (TEW) algorithms have been developed with the goal of providing informed tsunami source characterization for use in rapid, localized warning. An overlooked aspect of TEW is the means that this crucial information is disseminated. Current operations focus heavily on the time an alert is issued from a warning center, however, that alert passes through multiple groups and agencies before it is conveyed to affected communities. This distribution path can create further delays and contributes to inconsistencies in the message timeliness and content. In this study, we provide the framework and advocate for the use of a rapid dissemination tool, that we call WaveAlert, that would leverage preexisting advances in earthquake early warning systems to provide timely, clear, and consistent alerts to the public by use of the MyShake EEW phone app. This proposed tsunami dissemination tool would be able to provide consistent, public facing tsunami alerts over the duration of the hazard with the added benefit of low message latencies and high spatial resolution in who can be targeted for messages. We illustrate the need for rapid alerting strategies through a retrospective look at the alerting process during the 2022 Tonga tsunami and through a modeled potential near-field Cascadia timeline example affecting the west coast of the US.

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Suitability of Open-Ocean Instrumentation for Use in Near-Field Tsunami Early Warning Along Seismically Active Subduction Zones

Cited by 19 publications

References 55 publications

A Multiple-Parameter Methodology for Placement of Tsunami Sensor Networks

A Multiple-Parameter Methodology for Placement of Tsunami Sensor Networks

Introduction to “Twenty Five Years of Modern Tsunami Science Following the 1992 Nicaragua and Flores Island Tsunamis, Volume I”

Improving Efficacy of Tsunami Warnings Along the West Coast of the United States

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