Stochastic Simulation of Strong Ground Motions From Two M > 5 Uttarakhand Earthquakes

Many studies based on the geodetic data and statistical analysis of seismicity have pointed out that sufficient amount of stress accumulated in the Himalayan plate boundary may host a big earthquake. Consequently, high seismic activities and infrastructural developments in the major cities around Hi...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Nitin Sharma, D. Srinagesh, G. Suresh, D. Srinivas
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	stochastic strong ground motion earthquake site effect simulation Science Q
Acceso en línea:	https://doaj.org/article/8fb5b2169520454f91c4cc863cb24494
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:8fb5b2169520454f91c4cc863cb24494
record_format	dspace
spelling	oai:doaj.org-article:8fb5b2169520454f91c4cc863cb244942021-12-01T14:01:38ZStochastic Simulation of Strong Ground Motions From Two M > 5 Uttarakhand Earthquakes2296-646310.3389/feart.2021.599535https://doaj.org/article/8fb5b2169520454f91c4cc863cb244942021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/feart.2021.599535/fullhttps://doaj.org/toc/2296-6463Many studies based on the geodetic data and statistical analysis of seismicity have pointed out that sufficient amount of stress accumulated in the Himalayan plate boundary may host a big earthquake. Consequently, high seismic activities and infrastructural developments in the major cities around Himalayan regions are always of major concern. The ground motion parameter estimation plays a vital role in the near real time evaluation of potentially damaged areas and helps in mitigating the seismic hazard. Therefore, keeping in mind the importance of estimation of ground motion parameters, we targeted two moderate-size earthquakes that occurred recently within a gap of 10 months in Uttarakhand region with M > 5.0 on 06/02/2017 and 06/12/2017. The ground motions are simulated by adopting a stochastic modeling technique. The source is assumed as ω−2, a circular point source (Brune’s model). The average value of reported anelastic attenuation from various studies, the quality factor, Qs = 130.4*(f0.996), and stress drop values obtained through iterative procedure are considered for simulations. The stochastic spectra are generated between 0.1 and 10 Hz of frequency range. The site effect is also estimated by using the H/V method in the same frequency range. The synthetic spectra are compared with the observed Fourier amplitude spectra obtained from the recorded waveform data and converted back to the time histories. The stochastic time histories are compared with the observed waveforms and discussed in terms of amplitude (PGA). The simulated and observed response spectra at different structural periods are also discussed. The mismatch between the observed and simulated PGA values along with the GMPE existing for shallow crustal earthquakes is also discussed in the present work.Nitin SharmaD. SrinageshG. SureshD. SrinivasFrontiers Media S.A.articlestochasticstrong ground motionearthquakesite effectsimulationScienceQENFrontiers in Earth Science, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	stochastic strong ground motion earthquake site effect simulation Science Q
spellingShingle	stochastic strong ground motion earthquake site effect simulation Science Q Nitin Sharma D. Srinagesh G. Suresh D. Srinivas Stochastic Simulation of Strong Ground Motions From Two M > 5 Uttarakhand Earthquakes
description	Many studies based on the geodetic data and statistical analysis of seismicity have pointed out that sufficient amount of stress accumulated in the Himalayan plate boundary may host a big earthquake. Consequently, high seismic activities and infrastructural developments in the major cities around Himalayan regions are always of major concern. The ground motion parameter estimation plays a vital role in the near real time evaluation of potentially damaged areas and helps in mitigating the seismic hazard. Therefore, keeping in mind the importance of estimation of ground motion parameters, we targeted two moderate-size earthquakes that occurred recently within a gap of 10 months in Uttarakhand region with M > 5.0 on 06/02/2017 and 06/12/2017. The ground motions are simulated by adopting a stochastic modeling technique. The source is assumed as ω−2, a circular point source (Brune’s model). The average value of reported anelastic attenuation from various studies, the quality factor, Qs = 130.4*(f0.996), and stress drop values obtained through iterative procedure are considered for simulations. The stochastic spectra are generated between 0.1 and 10 Hz of frequency range. The site effect is also estimated by using the H/V method in the same frequency range. The synthetic spectra are compared with the observed Fourier amplitude spectra obtained from the recorded waveform data and converted back to the time histories. The stochastic time histories are compared with the observed waveforms and discussed in terms of amplitude (PGA). The simulated and observed response spectra at different structural periods are also discussed. The mismatch between the observed and simulated PGA values along with the GMPE existing for shallow crustal earthquakes is also discussed in the present work.
format	article
author	Nitin Sharma D. Srinagesh G. Suresh D. Srinivas
author_facet	Nitin Sharma D. Srinagesh G. Suresh D. Srinivas
author_sort	Nitin Sharma
title	Stochastic Simulation of Strong Ground Motions From Two M > 5 Uttarakhand Earthquakes
title_short	Stochastic Simulation of Strong Ground Motions From Two M > 5 Uttarakhand Earthquakes
title_full	Stochastic Simulation of Strong Ground Motions From Two M > 5 Uttarakhand Earthquakes
title_fullStr	Stochastic Simulation of Strong Ground Motions From Two M > 5 Uttarakhand Earthquakes
title_full_unstemmed	Stochastic Simulation of Strong Ground Motions From Two M > 5 Uttarakhand Earthquakes
title_sort	stochastic simulation of strong ground motions from two m > 5 uttarakhand earthquakes
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/8fb5b2169520454f91c4cc863cb24494
work_keys_str_mv	AT nitinsharma stochasticsimulationofstronggroundmotionsfromtwom5uttarakhandearthquakes AT dsrinagesh stochasticsimulationofstronggroundmotionsfromtwom5uttarakhandearthquakes AT gsuresh stochasticsimulationofstronggroundmotionsfromtwom5uttarakhandearthquakes AT dsrinivas stochasticsimulationofstronggroundmotionsfromtwom5uttarakhandearthquakes
_version_	1718405072262529024

Stochastic Simulation of Strong Ground Motions From Two M > 5 Uttarakhand Earthquakes

Ejemplares similares