Comparison Between Tsunami Signals Generated by Different Source Models and the Observed Data of the Illapel 2015 Earthquake

Calisto, Ignacia; Miller, Matthew; Constanzo, Iván

doi:10.1007/978-3-319-57822-4_20

Cited by 4 publications

(2 citation statements)

References 34 publications

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“…Tsunami modeling for different seismic sources and comparison with observations were carried out by Calisto et al (2016) and Fuentes et al (2016).…”

Section: Slip Distributionmentioning

confidence: 99%

A Review of Source Models of the 2015 Illapel, Chile Earthquake and Insights from Tsunami Data

Satake

Heidarzadeh

2016

Pure Appl. Geophys.

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The 16 September 2015 Illapel, Chile, earthquake and associated tsunami have been studied by many researchers from various aspects. This paper reviews studies on the source model of the earthquake and examines tsunami data. The Illapel earthquake occurred in the source region of previous earthquakes in 1943 and 1880. The earthquake source was studied using various geophysical data, such as near-field seismograms, teleseismic waveform and backprojection, GPS and InSAR data, and tsunami waveforms. Most seismological analyses show a duration of *100 s with a peak at *50 s. The spatial distribution has some variety, but they all have the largest slip varying from 5 to 16 m located at 31°S, 72°W, which is *70 km NW of the epicenter. The shallow slip seems to be extended to the trench axis. A deeper slip patch was proposed from high-frequency seismic data. A tsunami earthquake model with a total duration of 250 s and a third asperity south of the epicenter is also proposed, but we show that the tsunami data do not support this model.

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“…Tsunami modeling for different seismic sources and comparison with observations were carried out by Calisto et al (2016) and Fuentes et al (2016).…”

Section: Slip Distributionmentioning

confidence: 99%

A Review of Source Models of the 2015 Illapel, Chile Earthquake and Insights from Tsunami Data

Satake

Heidarzadeh

2016

Pure Appl. Geophys.

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“…Moreover, arrival times of the leading waves computed for full models may yield an anticipation or delay of several minutes when compared to pure tsunami or composite simulations. Currently, tsunami hazard assessments seldom include nonlinear interactions between tide and tsunami. Expected ranges of possible tsunami scenarios in such kinds of studies are usually addressed in terms of the variability of the initial condition of earthquake rupture, essentially based on historic events, differences in computed slip distributions for individual events, and/or determination of possible “worst case scenarios” in a somewhat deterministic fashion (e.g., Calisto et al, ; Razafindrakoto et al, ). Here we show that tsunami‐tide interactions, as well as the preferred modeling approach, lead to large differences in tsunami elevation, flow speed, and arrival times within highly energetic tidal channels, thus adding another source of variability for possible alternative scenarios which could affect coastal regions exposed to tsunamigenic events.…”

Section: Discussionmentioning

confidence: 99%

How Do Tides and Tsunamis Interact in a Highly Energetic Channel? The Case of Canal Chacao, Chile

et al. 2017

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This study aims at understanding the role of tidal level, speed, and direction in tsunami propagation in highly energetic tidal channels. The main goal is to comprehend whether tide‐tsunami interactions enhance/reduce elevation, currents speeds, and arrival times, when compared to pure tsunami models and to simulations in which tides and tsunamis are linearly superimposed. We designed various numerical experiments to compute the tsunami propagation along Canal Chacao, a highly energetic channel in the Chilean Patagonia lying on a subduction margin prone to megathrust earthquakes. Three modeling approaches were implemented under the same seismic scenario: a tsunami model with a constant tide level, a series of six composite models in which independent tide and tsunami simulations are linearly superimposed, and a series of six tide‐tsunami nonlinear interaction models (full models). We found that hydrodynamic patterns differ significantly among approaches, being the composite and full models sensitive to both the tidal phase at which the tsunami is triggered and the local depth of the channel. When compared to full models, composite models adequately predicted the maximum surface elevation, but largely overestimated currents. The amplitude and arrival time of the tsunami‐leading wave computed with the full model was found to be strongly dependent on the direction of the tidal current and less responsive to the tide level and the tidal current speed. These outcomes emphasize the importance of addressing more carefully the interactions of tides and tsunamis on hazard assessment studies.

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Locking-derived tsunami scenarios for the most recent megathrust earthquakes in Chile: implications for tsunami hazard assessment

2021

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Comparison Between Tsunami Signals Generated by Different Source Models and the Observed Data of the Illapel 2015 Earthquake

Cited by 4 publications

References 34 publications

A Review of Source Models of the 2015 Illapel, Chile Earthquake and Insights from Tsunami Data

A Review of Source Models of the 2015 Illapel, Chile Earthquake and Insights from Tsunami Data

How Do Tides and Tsunamis Interact in a Highly Energetic Channel? The Case of Canal Chacao, Chile

Locking-derived tsunami scenarios for the most recent megathrust earthquakes in Chile: implications for tsunami hazard assessment

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