29 Result(s)
within
Kamal
Earth Sciences
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Article
Site class based seismic magnitude prediction equations for earthquake early warning
Although earthquake early warning (EEW) systems have advanced significantly, accurately determining earthquake parameters from the initial 3 s of P-wave motion remains challenging. Factors such as the complexi...
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Article
Geophysical signatures of the Saraswati River palaeochannel in a part of Kurukshetra district, Haryana, India
The palaeochannel is one of the promising features to hold a considerable amount of groundwater and acts as an underground reservoir for supplementing groundwater resources. There is a need for site-specific s...
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Article
Successful Alert Issuance with Sufficient Lead Time by Uttarakhand State Earthquake Early Warning System: Case Study of Nepal Earthquakes
Three moderate earthquakes on November 9, 2022, November 12, 2022, and January 24, 2023 occurred in Western Nepal region of Magnitudes 5.8, 5.4 and 5.8 respectively. The epicenters were ∼100 km away from the U...
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Article
Design and implementation of earthquake early warning dissemination mobile app for Uttarakhand (India)
Smartphones are one of the most affordable and familiar devices available to people that are used for many scientific applications. Thus, implementing a dedicated mobile app for earthquake early warning (EEW) ...
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Article
Analysis of earthquake hypocenter characteristics using chaos game representation
This paper proposes a new method to approach earthquake hypocenter studies based on Chaos Game Representation (CGR), a method initially used for making fractal structures and applied for studying DNA sequences...
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Instrumentation of India’s First Regional Earthquake Early Warning System and Site Characterization of Its Stations
The Earthquake Early Warning System Laboratory, Centre of Excellence in Disaster Mitigation & Management, Indian Institute of Technology Roorkee has developed India's first Earthquake Early Warning System (EEW...
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Article
Strong motion generation area modelling of the 2008 Iwate earthquake, Japan using modified semi-empirical technique
The Iwate–Miyagi earthquake (Mw 6.9) of 14 June 2008 is one of the largest intraplate earthquakes that struck north-east Japan. This earthquake has produced the largest peak ground acceleration (PGA) ever recorde...
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Modelling of strong motion generation areas for a great earthquake in central seismic gap region of Himalayas using the modified semi-empirical approach
Over the past decades, strong motion generation areas (SMGAs) have received significant attention in the modelling of high-frequency records. Herein, we propose the source model for a scenario earthquake ( ...
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Probabilistic seismic hazard for Himalayan region using kernel estimation method (zone-free method)
In view of active seismic status of the Himalayan belt and continued developmental activities in mountainous states, it is imperative to update knowledge of seismic hazard incorporating latest knowledge on ear...
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Article
A scenario of ground shaking hazard in intracratonic circular basins developed by basin-generated surface waves: an earthquake engineering perspective
This paper presents the comparative scenario of ground motion amplifications in the 2D semi-cylindrical (SC) basin and 3D semi-spherical (SS) intracratonic basin caused by the basin-generated surface (BGS) wav...
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Simulation of Strong Ground Motion of the 2009 Bhutan Earthquake Using Modified Semi-Empirical Technique
On 21st September 2009 an earthquake of magnitude (M w 6.1) occurred in the East Bhutan. This earthquake caused serious damage to the residential area and was widely felt in the Bhutan Him...
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Emergence of the semi-empirical technique of strong ground motion simulation: A review
High frequency ground motion simulation techniques are powerful tools for designing earthquake resistant structures in seismically active regimes. Simulation techniques also provide the synthetic strong ground...
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Article
Open AccessEffects of basin parameters on the spatial variation of characteristics of basin generated Rayleigh waves
This paper presents the effects of shape of interface between the sediment and basement rock (SISB), basin-shape-ratio, impedance contrast, sediment-dam** and angle of incidence of body waves on the characte...
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Source study of M w 5.4 April 4, 2011 India–Nepal border earthquake and scenario events in the Kumaon–Garhwal Region
In the present work, ground motion is estimated from future scenario earthquakes at different sites in Uttarakhand Himalayas in India using empirical Green’s function (EGF) technique. The recorded ground motio...
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Modeling of strong motion generation areas of the Niigata, Japan, earthquake of 2007 using modified semi-empirical technique
The Niigata prefecture in Japan was devastated by a large shallow earthquake (M w 6.6, M JMA 6.8) on July 16, 2007. This earthquake has been recorded at 305 stations of Kiban Kyos...
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Article
Body Wave Crustal Attenuation Characteristics in the Garhwal Himalaya, India
We estimate frequency-dependent attenuation of P and S waves in Garhwal Himalaya using the extended coda normalization method for the central frequencies 1.5, 2, 3, 4, 6, 8, 10, 12, and 16 Hz, with earthquake ...
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Article
Probabilistic seismic hazard assessment of NW and central Himalayas and the adjoining region
The Himalayan region has undergone significant development and to ensure safe and secure progress in such a seismically vulnerable region there is a need for hazard assessment. For seismic hazard assessment, i...
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3D basin-shape ratio effects on frequency content and spectral amplitudes of basin-generated surface waves and associated spatial ground motion amplification and differential ground motion
This paper presents the effects of basin-shape ratio (BSR) on the frequency content and spectral amplitudes of the basin-generated surface (BGS) waves and the associated spatial variation of ground motion ampl...
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Open AccessA Numerical Study of Effects of Valley-Weathering and Valley-Shape-Ratio on the Ground Motion Characteristics
A study of combined effects of valley-weathering and valley-shaperatio on the ground motion characteristics and associated differential ground motion (DGM) is documented in this paper. In order to properly qua...
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Effect of frequency-dependent radiation pattern in the strong motion simulation of the 2011 Tohoku earthquake, Japan, using modified semi-empirical method
We perform a strong ground motion simulation using a modified semi-empirical technique (Midorikawa in Tectonophysics 218:287–295, 1993), with frequency-dependent radiation pattern model. Joshi et al. (Nat Hazards...
