29 Result(s)
within
A. Joshi
Hydrogeology
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Article
Modelling of 2016 Kumamoto earthquake by integrating site effect in semi-empirical technique
The 2016 Kumamoto earthquake (MJMA7.3) struck central area of Kyushu Island, Japan. The presence of near surface low velocity layer greatly amplified the ground motions and caused severe damage in this region. Th...
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Article
Differential Crustal Attenuation in the Garhwal and Kumaon Himalaya Obtained from Seismological and Geophysical Studies
The Uttarakhand Himalaya which comprises of the Garhwal and Kumaon Himalaya lies in the central seismic gap region of India. Strong motion networks have been installed separately in the Garhwal and Kumaon Hima...
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Spatial variability studies of attenuation characteristics of Qα and Qβ in Kumaon and Garhwal region of NW Himalaya
The present work explores the attenuation characteristics of Garhwal and Kumaon regions of northwest Himalaya, India. A comparative study of P- and S-wave quality factors (Qα and Qβ) is used to appreciate the dif...
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Article
Determination of site effect and anelastic attenuation at Kathmandu, Nepal Himalaya region and its use in estimation of source parameters of 25 April 2015 Nepal earthquake Mw = 7.8 and its aftershocks including the 12 May 2015 Mw = 7.3 event
The destructive Mw = 7.8 Nepal earthquake happened in Nepal Himalaya, 80 km NW of Kathmandu city on 25 April 2015. A number of aftershocks in which one of them is Mw = 7.3 which occurred on 12 May 2015 are obser...
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Article
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
Estimation of the source parameters of the Nepal earthquake from strong motion data
Kathmandu and its surrounding region were rocked recently by a devastating earthquake on April 25, 2015. This is the largest earthquake that has occurred in this region since the past eight decades. This earth...
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Simulation of the records of the 27 March 2013 Nantou Taiwan earthquake using modified semi-empirical approach
It is seen that strong motion generation area plays an important role in the sha** of strong motion records at the observation point. Strong motion generation areas identified within the rupture plane of th...
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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
Coda wave attenuation characteristics for Kumaon and Garhwal Himalaya, India
Uttarakhand Himalayas are among one of the most seismically active continental regions of the world. The Himalayan belt in this region is divided into Kumaon and Garhwal Himalaya. The Kumaon Himalayas has not...
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Article
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...
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Article
Modeling of strong motion generation area of the Uttarkashi earthquake using modified semiempirical approach
The semiempirical approach based on envelope summation method given by Midorikawa (Tectonophysics 218:287–295, 1993) has been modified in this paper for modeling of strong motion generation areas (SMGAs). Horizon...
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Article
Modeling of strong motion generation areas of the 2011 Tohoku, Japan earthquake using modified semi-empirical technique
Modification in the semi-empirical technique for the simulation of strong ground motion has been introduced to incorporate the strong motion generation areas (SMGA) in the modeled rupture plane. Strong motion ...
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Article
Erratum to: Hybrid attenuation model for estimation of peak ground accelerations in the Kutch region, India
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Article
Use of site amplification and anelastic attenuation for the determination of source parameters of the Sikkim earthquake of September 18, 2011, using far-field strong-motion data
An earthquake of magnitude 6.9 (M w) occurred in the Sikkim region of India on September 18, 2011. This earthquake is recorded on strong-motion network in Uttarakhand Himalaya located about 900 km...
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Article
Simulation of strong ground motion due to great earthquake in the central seismic gap region of Uttarakhand Himalaya
Uttarakhand Himalaya in India lies in the central seismic gap region identified by Khattri and Tyagi (Tectonophysics 96:281–297, 1983). Most of the area in Uttarakhand state has been placed under zone V (the high...
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Article
Hybrid attenuation model for estimation of peak ground accelerations in the Kutch region, India
The Kutch region of Gujarat in India is the locale of one of the most devastating earthquake of magnitude (M w) 7.7, which occurred on January 26, 2001. Though, the region is considered as seismic...
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Article
Near-field and far-field simulation of accelerograms of Sikkim earthquake of September 18, 2011 using modified semi-empirical approach
The semi-empirical approach for modeling of strong ground motion given by Midorikawa (Tectonophysics 218:287–295, 1993) has been modified in the present paper for component wise simulation of strong ground motion...
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Article
Estimation of model parameter of Sumatra earthquake using empirical Green’s function technique and generation of hypothetical earthquake scenario for Andaman Island, India
Empirical Green’s function (EGF) technique is considered to be most effective technique for simulation of ground motions due to a finite earthquake source. In the present paper, this technique has been used to...
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Article
Role of attenuation relationship in sha** the seismic hazard
Attenuation relationships are commonly used for engineering studies to estimate the peak ground acceleration values. This paper presents the role of attenuation relationship in defining the seismic hazard in a...
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Article
Use of spectral acceleration data for determination of three-dimensional attenuation structure in the Pithoragarh region of Kumaon Himalaya
Three-dimensional attenuation structures are related to the subsurface heterogeneities present in the earth crust. An algorithm for estimation of three-dimensional attenuation structure in the part of Garhwal ...
