Seismic Site Classification and Empirical Correlation Between Standard Penetration Test N Value and Shear Wave Velocity for Guwahati Based on Thorough Subsoil Investigation Data

  Guwahati, the Gateway of India in the northeast, is a large business and development centre. Past seismic scenarios suggest moderate to significant effects of regional Earthquakes (EQs) in Guwahati in terms of liquefaction as well as building damages. Considering the role of local soil in amplifying EQ generated ground motions and controlling surface damages, […]

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Determination of seismic wave attenuation in Delhi, India, towards quantification of regional seismic hazard

  National capital of India, Delhi is under moderate to high seismic hazard due to active regional faults such as the Mahendragarh fault, the Delhi Haridwar fault, the Sohna fault, the Delhi Meerut fault and the Rajasthan boundary fault. In addition, Delhi is also located within 200km radial distance from Main Boundary Thrust (MBT) and […]

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Seismic Site Classification of Recording Stations in Tarai Region of Uttarakhand, from Multiple Approaches

Repeated earthquakes (EQs) are clear indication of alarming seismicity which can be witnessed across Indian subcontinent. Increase in population density with inappropriate construction practice repeatedly rise alarm that in comparison to damage scenarios experienced during previous major to great EQs in India, future catastrophes would be manifold. Performing regional seismic hazard as well as site […]

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Determination of NEHRP Site Class of Seismic Recording Stations in the Northwest Himalayas and Its Adjoining Area Using HVSR Method

  Local site characteristics plays an important role in controlling the damage pattern during earthquakes (EQs). These site characteristics may vary from simple to complex and can be estimated by various field tests. In addition, extended Nakamura‚Äôs method, which uses horizontal to vertical spectral ratio (HVSR) based on available EQ records also available for site […]

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Banerjee Soham and Kumar Abhishek (2017), Determination of S and Coda Wave Attenuation in Selected Regions of Lower and Northern Assam Within North Eastern India, Indian Geotechnical Journal, DOI 10.1007/s40098-017-0259-1

The North Eastern (NE) regions of India has been subjected to vicious damages due to numerous earthquakes (EQs). Thus, seismological study in this part of India has been a priori for a long period of time. Present study focuses to find the attenuation characteristics of selected regions within NE India. These selected regions include Guwahati […]

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Banerjee Soham, Kumar Abhishek (2017), Determination of Seismic Wave Attenuation for the Garhwal Himalayas, India, Geosciences Research, DOI: 10.22606/gr.2017.22005

Present work determines the seismic wave attenuation characteristics in the Garhwal Himalayan, India. These are obtained based on the attenuations of P, S and coda wave spectra from the recorded seismograms of nearby earthquakes (EQs) with focal depth up to 10 km. Since P and S waves come directly to the site, attenuation of P […]

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Baro Olympa, Kumar Abhishek (2017), Seismic Source characterization for the Shillong Plateau in Northeast India, Journal of Seismology, DOI: 10.1007/s10950-017-9664-2

  Present study aims at understanding the seismotectonic province of the Shillong Plateau (SP) by identifying the potential seismic source zones within a radius of 500km from the centre of the SP. From existing literature and earthquake (EQ) data the seismotectonic region is found to vary in terms of seismicity, tectonic features, geology, thickness of […]

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Kumar, A. and Mondal Joy K., (2017), Newly Developed MATLAB Based Code for Equivalent Linear Site Response Analysis, Geotechnical and Geological Engineering, DOI 10.1007/s10706-017-0246-4

Characteristics of ground motions generated during an earthquake (EQ) alter between bedrock and the surface depending upon subsoil properties. Such modifications in the ground motion characteristics are termed as local site effects. Building response as well as induced effects of EQs are thus controlled by these modified ground motions at the surface. Hence, addressing the […]

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Kumar, A. and Srinivas, B.V. (2017), Easy to Use Empirical Correlations for Liquefaction and No Liquefaction Conditions, Geotechnical and Geological Engineering, doi:10.1007/s10706-017-0183-2

Considerable damages during an earthquake (EQ) are the consequence of in-situ soil losing its shear strength which is popularly known as liquefaction. A number of methodologies are available to quantify the safety of a site against liquefaction occurrence. Widely accepted recent methodologies follow iterative process making it cumbersome for the field engineer. In the present […]

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Kumar, A., Harinarayan, N.H. and Baro, O. (2017), Nonlinear soil response to ground motions during different earthquakes in Nepal, to arrive at surface response spectra, Natural Hazards, doi:10.1007/s11069-017-2751-4

Catastrophic damages reported during an earthquake include building damages, excessive ground shaking, uneven settlements, liquefaction etc. While most of the seismic hazard studies map the probable level of ground shaking at the bedrock level, their use in assessing the above damages is very limited until the response of the local soil is also taken into […]

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