Ground motion parameters for the 2015 Nepal Earthquake and its aftershocks

Basu, Jahnabi; Podili, Bhargavi; Raghukanth, S. T. G.; Srinagesh, D.

doi:10.1007/s11069-022-05755-4

Cited by 5 publications

(1 citation statement)

References 57 publications

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“…The selection of appropriate ground motion models (GMMs) applicable to Nepal is clearly one of the main challenges since currently, no fully local GMM based on locally observed seismic data has been developed suitable for PSHA purpose [93]. Some efforts have been made in recent years to develop GMMs adapted for the Himalayan context (e.g., [94][95][96]), however, for this study, we exclude the application of such GMMs due to several limitations such as the model developed for estimation of PGA only or/and use of very limited local data from Nepal for development of GMM. Hence, for this project, we made the simple choice to adopt a multiple GMM approach using GMMs developed based on global or Japanese datasets.…”

Section: Ground Motion Modelsmentioning

confidence: 99%

New Probabilistic Seismic Hazard Model for Nepal Himalayas by Integrating Distributed Seismicity and Major Thrust Faults

Maharjan¹,

Poujol²,

Martin³

et al. 2023

Geosciences

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Nepal is one of the most seismically active regions in the world, as highlighted by the recent devastating 2015, Mw~7.8 Gorkha earthquake, and a robust assessment of seismic hazard is paramount for the design of earthquake-resistant structures. In this study, we present a new probabilistic seismic hazard assessment (PSHA) for Nepal. We considered data and findings from recent scientific publications, which allowed us to develop a unified magnitude homogenized seismicity catalog and propose alternative seismic source characterization (SSC) models including up-to-date parameters of major thrust faults like main frontal thrust (MFT) and main boundary thrust (MBT), while also considering existing SSC models and various seismic hazard modeling strategies within a logic tree framework. The sensitivity analyses show the seismic hazard levels are generally higher for SSC models integrating the major thrust faults, followed by homogenous volume sources and smoothed seismicity approach. The seismic hazard maps covering the entirety of Nepal are presented as well as the uniform hazard spectra (UHS) for five selected locations (Kathmandu, Pokhara, Biratnagar, Nepalganj, and Dipayal) at return periods of 475- and 2475-years considering Vs,30 = 760 m/s. The results obtained are generally consistent with most recent studies. However, a notable variability in seismic hazard levels and several discrepancies with respect to the Nepal Building Building Code NBC105: 2020 and global hazard model, GEM are noted, and possible causes are discussed.

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Section: Ground Motion Modelsmentioning

confidence: 99%

New Probabilistic Seismic Hazard Model for Nepal Himalayas by Integrating Distributed Seismicity and Major Thrust Faults

Maharjan¹,

Poujol²,

Martin³

et al. 2023

Geosciences

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Simulation of the 1934 Nepal–Bihar earthquake in Kathmandu

Ghimire,

Parajuli,

Maskey

2024

Nat Hazards

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In this study, utilizing appropriate target spectra and a special envelope function, an artificial time history is generated for the major earthquakes of 1934 and 2015 A.D. The peak ground acceleration (PGA), mean time period, predominant period, significant duration, response spectra, and Fourier spectra of the 2015 earthquake are obtained from the simulated time history These ground motion parameters of simulated earthquake are compared to those of the recorded earthquake of 2015. For the earthquake of 1934 A.D., the maximum PGA derived from the simulation and the PGA derived from the damage-based MMI scale are compared. These earthquakes' significant duration is also compared with other subduction zone earthquakes.Compared to other subduction zone earthquakes, Nepal's earthquakes have a longer significant duration.

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Simulations of Ground Motions for M _w 7.9 Nepal Earthquake

NagaTejasri,

Raghukanth,

Mittal

2024

Journal of Earthquake Engineering

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Ground motion parameters for the 2015 Nepal Earthquake and its aftershocks

Cited by 5 publications

References 57 publications

New Probabilistic Seismic Hazard Model for Nepal Himalayas by Integrating Distributed Seismicity and Major Thrust Faults

New Probabilistic Seismic Hazard Model for Nepal Himalayas by Integrating Distributed Seismicity and Major Thrust Faults

Simulation of the 1934 Nepal–Bihar earthquake in Kathmandu

Simulations of Ground Motions for M _w 7.9 Nepal Earthquake

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Ground motion parameters for the 2015 Nepal Earthquake and its aftershocks

Cited by 5 publications

References 57 publications

New Probabilistic Seismic Hazard Model for Nepal Himalayas by Integrating Distributed Seismicity and Major Thrust Faults

New Probabilistic Seismic Hazard Model for Nepal Himalayas by Integrating Distributed Seismicity and Major Thrust Faults

Simulation of the 1934 Nepal–Bihar earthquake in Kathmandu

Simulations of Ground Motions for M w 7.9 Nepal Earthquake

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Product

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Simulations of Ground Motions for M _w 7.9 Nepal Earthquake