Attenuation relations for strong seismic ground motion in the Himalayan region

Singh, Ramesh P.; Aman, Ashutosh; Prasad, Yogesh

doi:10.1007/bf00876442

Cited by 72 publications

(29 citation statements)

References 10 publications

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“…They have found that the attenuation of peak accelerations with distance in the western US is in agreement with that in the western Himalayan region, whereas for the eastern part, the level is three times higher. Aman et al (1995) and Singh et al (1996) also found the similar results for the Himalayan regions. This is one explanation why Bhatia et al (1999) estimate lower values for the eastern Himalayan region while Khattri et al (1984) estimates slightly higher values for the western and central Himalayas.…”

Section: Probabilistic Seismic Hazard Assessment Of the Indian Subconsupporting

confidence: 58%

New approaches for seismic hazard studies in the Indian subcontinent

Parvez

2013

Geomatics, Natural Hazards and Risk

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Earthquakes constitute among the most feared natural hazards and these occur with no warning which can result in great destruction and loss of lives, particularly in developing countries. One way to mitigate the destructive impact of such earthquakes is to conduct a seismic hazard assessment and take remedial measures. This article aims at demonstrating significant contributions in the field of seismic zonation and microzonation studies in the Indian subcontinent. The contributions in the field of earthquake hazard have been very valuable and beneficial not only for science but also for society. The historical seismicity and seismic zonation studies as well as the present scenario of seismic hazard assessment in the Indian subcontinent, whether through probabilistic or deterministic approaches, are discussed. It has been found that many parts of the Himalayan region have peak acceleration values exceeding 0.6g. The epicentral areas of the great Assam earthquakes of 1897 and 1950 in northeast India represent the maximum hazard with acceleration values reaching 1.2-1.3g. The peak velocity and displacement in the same region is estimated as 120-177 cm s 71 and 60-90 cm, respectively. To mitigate seismic risk, it is necessary to define a correct response in terms of both peak ground acceleration and spectral amplification. These factors are highly dependent on local soil conditions and on the source characteristics of the expected earthquakes. This article will also present the findings of site-specific hazard assessment in megacities.

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Section: Probabilistic Seismic Hazard Assessment Of the Indian Subconsupporting

confidence: 58%

New approaches for seismic hazard studies in the Indian subcontinent

Parvez

2013

Geomatics, Natural Hazards and Risk

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“…In the western Himalayan region, strong motion network has recorded only three earthquakes. Based on the database of these earthquakes, SINGH et al (1996); SHARMA (1998) and PARVEZ et al (2001) have developed empirical and theoretical laws to define attenuation of peak ground motion in the Himalayan region. Using the empirical relations by SINGH et al (1996); SHARMA (1998) and ABRAHAMSON and LITEHISER (1989), the following Root-Mean-Square Error (RMSE) is calculated for the Uttarkashi and the Chamoli earthquake's: Vol.…”

Section: Scaling Laws and Their Applicability In The Source Region Ofmentioning

confidence: 99%

“…Based on the database of these earthquakes, SINGH et al (1996); SHARMA (1998) and PARVEZ et al (2001) have developed empirical and theoretical laws to define attenuation of peak ground motion in the Himalayan region. Using the empirical relations by SINGH et al (1996); SHARMA (1998) and ABRAHAMSON and LITEHISER (1989), the following Root-Mean-Square Error (RMSE) is calculated for the Uttarkashi and the Chamoli earthquake's: Vol. 161, 2004A Simplified Technique 1785 where, N is the total number of observations, A fi and A si are the observed and calculated peak ground acceleration values at i-th station.…”

Section: Scaling Laws and Their Applicability In The Source Region Ofmentioning

confidence: 99%

A Simplified Technique for Simulating Wide-band Strong Ground Motion for Two Recent Himalayan Earthquakes

Joshi

2004

Pure and Applied Geophysics

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A simplified technique for simulation of wide-band strong motion based on simple regression relations and Empirical Green's Function (EGF) technique by IRIKURA (1986) is presented in this paper. The method uses the acceleration envelope as a shaping window for a filtered white Gaussian noise, to get the synthetic accelerogram from each subfault. Correction factors for slip of large and small events and transmission factors at each boundary of different layers are included in this synthetic accelerogram. The synthetic accelerogram obtained from each subfault is used as the Green's function to get resultant records. Simulations are made for the confirmed models of the Uttarkashi and the Chamoli earthquakes at a number of stations to get wide-band strong ground motion. The comparison of synthetic with the observed records over a wide range of frequencies for two different Himalayan earthquakes establishes the efficacy of the present technique.

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“…Realistic results visa-vis complexity and computational as well as data requirement are the deciding factors for applicability of a particular technique. Some of the techniques widely used include: (i) stochastic approach (Boore and Atkinson, 1987;Beresnev and Atkinson, 1997;Motazedian and Atkinson, 2005), (ii) Green functions method (Bouchon and Aki, 1977), (iii) empirical Green functions method (Hartzell, 1978;Irikura, 1983), (iv) finite difference method (Panza, 1985;Oprsal and Zahradnik, 2002), (v) finite element method (Frankel, 1989), (2002), Singh et al (1996), and Chandrasekaran (1994) for Himalayas, Atkinson and Boore (1995) for East North America, Ambraseys (1995) for Europe, Joyner and Boore (1981) for California, Nath et al (2005) for Sikkim Himalaya, and Nath et al (2009) and (vi) spectral element method (Komatitsch and Tromp, 1999).…”

Section: Strong Motion Synthesis and Deterministic Seismic Hazardmentioning

confidence: 99%

Seismic hazard assessment – a holistic microzonation approach

Nath

Thingbaijam

2009

Nat. Hazards Earth Syst. Sci.

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Abstract. The probable mitigation and management issues of seismic hazard necessitate seismic microzonation for hazard and risk assessment at the local level. Such studies are preceded with those at a regional level. A comprehensive framework, therefore, encompasses several phases from information compilations and data recording to analyses and interpretations. The state-of-the-art methodologies involve multi-disciplinary approaches namely geological, seismological, and geotechnical methods delivering multiple perspectives on the prevailing hazard in terms of geology and geomorphology, strong ground motion, site amplification, site classifications, soil liquefaction potential, landslide susceptibility, and predominant frequency. The composite hazard is assessed accounting for all the potential hazard attributing features with relative rankings in a logic tree, fuzzy set or hierarchical concept.

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Attenuation relations for strong seismic ground motion in the Himalayan region

Cited by 72 publications

References 10 publications

New approaches for seismic hazard studies in the Indian subcontinent

New approaches for seismic hazard studies in the Indian subcontinent

A Simplified Technique for Simulating Wide-band Strong Ground Motion for Two Recent Himalayan Earthquakes

Seismic hazard assessment – a holistic microzonation approach

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