Source and high-frequency decay parameters for the Azores region for stochastic finite-fault ground motion simulations

Carvalho, Alexandra; Reis, Cleômenes; Vales, Dina

doi:10.1007/s10518-015-9842-y

Cited by 16 publications

(32 citation statements)

References 29 publications

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“…No significant differences were found between these groups and all data were therefore grouped together. For the central west area, Carvalho et al (2015) did a coda Q study using geometrical spreading parameter 1.0, window length 20 s and lapse time at two times the S-travel time and got Q 76f 0:69 . The parameters are almost the same as our alternative parameters and the Q-relation also nearly the same.…”

Section: The Azores Archipelagomentioning

confidence: 99%

CodaQin Different Tectonic Areas, Influence of Processing Parameters

Havskov¹,

Sørensen²,

Vales³

et al. 2016

Bulletin of the Seismological Society of America

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Published results of coda Q show a large variation in values. These variations are often claimed to be related to different tectonics, whereas they might just be related to using different assumptions in the processing, leading to different input parameters for the analysis. In this study, the effect of using different processing parameters is investigated and significant differences, particularly at low frequencies, are observed. We find a new set of optimal parameters, which we recommend using in future studies. Using a short lapse time of 30 s and optimal parameters, data from both similar and very different tectonic regions are used to calculate coda Q using the same program and the same parameters.

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Section: The Azores Archipelagomentioning

confidence: 99%

CodaQin Different Tectonic Areas, Influence of Processing Parameters

Havskov¹,

Sørensen²,

Vales³

et al. 2016

Bulletin of the Seismological Society of America

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show abstract

“…For the path effects, two alternative geometric spreading models are tested: The first model was already employed by the study of Zonno et al (2010) and the second model is the region-specific model proposed by the study of Carvalho et al (2016).…”

Section: Ground Motion Simulation Methodologymentioning

confidence: 99%

“…For the quality factor, two different models are tested: The model employed by Zonno et al (2010) and the region-specific model of Carvalho et al (2016).…”

Section: Ground Motion Simulation Methodologymentioning

confidence: 99%

Stochastic Ground Motion Simulation of the 9<sup>th</sup> of July 1998 Faial Earthquake (Azores, North Atlantic)

Karimzadeh

Lourenço

2021

Preprint

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“…where b 1 = 1.0, b 2 = 0, and b 3 = 0.5, and R 01 and R 02 are related to crustal thickness ( D ; Carvalho et al, 2016). The average crustal thickness in Yunnan Province is 40 km (Su et al, 2006), so R 01 = 1.5 D = 60 km and R 02 = 2.5 D = 100 km.…”

Section: Simulation Of the 2021 Yangbi Earthquake With A Magnitude Of...mentioning

confidence: 99%

Ground motion simulation for the 21 May 2021 Ms 6.4 Yangbi, China, earthquake using stochastic finite-fault method

et al. 2022

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On 21 May 2021, a 6.4-magnitude earthquake occurred in Yangbi County, Yunnan Province, China. To reproduce the ground motion characteristics of this earthquake, the stochastic finite-fault method was adopted. The ground motion records were analyzed to determine the source, path, and site parameters. Based on the optimization algorithm, the stress drop was set to 10 bar. The S-wave attenuation relation ( QS = 122.7 f0.44) was calculated by the spectral decay method. For the site effect, the site amplification was corrected using the horizontal-to-vertical spectral ratio method, and the zero-distance kappa filter had a value of 0.0328 s. To verify the reliability of the input parameters, the simulated 5%-damped pseudo-spectral acceleration, time history, and Chinese instrumental intensity were compared with those observed at six stations and finding acceptable consistency. Furthermore, the fitted model was used to simulate the ground motion of 2279 nodal points in the area, and the seismic intensity contours were obtained. Finally, the earthquake damage assessment was performed in the Yangbi County, and the difference between the designed spectral acceleration and that simulated at a specific period was regarded as the degree of earthquake damage. It was found that the reinforced concrete structures near the epicenter have sufficient safety reserves, and the earthquake damage was not serious. In summary, the stochastic finite-fault method with calibrated parameters could effectively synthesize the ground motion of specific sites, thus providing a basis for the earthquake damage assessment of engineering buildings.

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Source and high-frequency decay parameters for the Azores region for stochastic finite-fault ground motion simulations

Cited by 16 publications

References 29 publications

CodaQin Different Tectonic Areas, Influence of Processing Parameters

CodaQin Different Tectonic Areas, Influence of Processing Parameters

Stochastic Ground Motion Simulation of the 9<sup>th</sup> of July 1998 Faial Earthquake (Azores, North Atlantic)

Ground motion simulation for the 21 May 2021 Ms 6.4 Yangbi, China, earthquake using stochastic finite-fault method

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