Quantifying seismic vulnerability, dynamical shear strain and liquefaction of the Quaternary deposits in the Doon valley near the Main Boundary Thrust in the Northwest Himalaya, India

Sathyaseelan, Rajesh; Mundepi, A. K.; Kumar, Naresh

doi:10.1016/j.quaint.2017.05.018

Cited by 9 publications

(3 citation statements)

References 39 publications

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“…1. The sampling location has a vast variation in its lithology due to deposistion minerals and ores [24][25][26][27][28]. as it falls over and near the Main Boundary Thrust (MBT) region.…”

Section: Geology Of the Locationmentioning

confidence: 99%

Evaluation of background radiation level and excess lifetime cancer risk in Doon valley, Garhwal Himalaya

Kandari¹,

Singh

Semwal

et al. 2021

J Radioanal Nucl Chem

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Radionuclides such as Ra-226, Th-232 & K-40 occurs naturally in the earth crust from its creation and are main contributor to the dose received by human beings. The present study was carried-out in the Doon valley which is outlined in the Main Boundary Thrust (MBT) region of Garhwal Himalaya in Uttarakhand, India. The collected soil/rock samples were analyzed by NaI(Tl) Gamma ray spectrometry for the analysis of radionuclides and hence measuring the various health hazard indices and Excess lifetime cancer risk. Radionuclide (226Ra, 232Th & 40K) content were found to vary from 47 ± 9 to 442 ± 50 Bq Kg−1, 45 ± 17 to 101 ± 16 Bq Kg−1 & 320 ± 281 to 947 ± 197 Bq Kg−1 respectively and were higher than the world average values which are 35 Bq Kg−1, 30 Bq Kg−1 and 400 Bq Kg−1 respectively. Higher radionuclide content contributes to higher amount of absorbed doses which was found to vary from 93 to 259.6 ηGyh−1 with a mean value of 112.5 ηGyh−1 and Gamma index which found to vary from 0.73 to 1.92 with a mean value of 0.96. Lastly, on the basis of annual effective doses received to humanoid, Excess lifetime cancer risk was measured which varies from 0.48 × 10–3 to 1.34 × 10–3 with an average value of 0.65 × 10–3 and was much below the world’s average value of 1.45 × 10–3.

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“…1. The sampling location has a vast variation in its lithology due to deposistion minerals and ores [24][25][26][27][28]. as it falls over and near the Main Boundary Thrust (MBT) region.…”

Section: Geology Of the Locationmentioning

confidence: 99%

Evaluation of background radiation level and excess lifetime cancer risk in Doon valley, Garhwal Himalaya

Kandari¹,

Singh

Semwal

et al. 2021

J Radioanal Nucl Chem

View full text Add to dashboard Cite

show abstract

“…The estimated recurrence interval of such a Mw 7.0 event in the Himalayan region is about 100 years 4 . Thus when the region exceeds its elastic limit then a large earthquake can produce a large rupture extending towards the HFT and the Gangetic plain, where secondary seismic effects like liquefaction 10 or cavity formation can cause great havoc in the densely populated foothills. Thus the regions marked as interseismic low strain rate corridors in Figs.…”

Section: Resultsmentioning

confidence: 99%

“…The continued northward movement of the Indian plate against Eurasia resulted substantial stress accumulation across the Himalayan collisional belt which eventually released as small to large earthquakes 4 – 6 . The great Himalayan arc witnessed many devastating earthquakes in the past like the 1905 Kangra, 1934 Bihar–Nepal, 1950 Assam, 2005 Kashmir, 2015 Nepal and many more indicate that the region is seismically vulnerable 7 – 10 .…”

Section: Introductionmentioning

confidence: 99%

Crustal velocity and interseismic strain-rate on possible zones for large earthquakes in the Garhwal–Kumaun Himalaya

Pappachen

Sathiyaseelan

Gautam

et al. 2021

Sci Rep

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The possibility of a major earthquake like 2015 Gorkha–Nepal or even greater is anticipated in the Garhwal–Kumaun region in the Central Seismic Gap of the NW Himalaya. The interseismic strain-rate from GPS derived crustal velocities show multifaceted strain-rate pattern in the region and are classified into four different strain-rate zones. Besides compressional, we identified two NE–SW orienting low strain rate (~ 20 nstrain/a) zones; namely, the Ramganga-Baijro and the Nainital-Almora, where large earthquakes can occur. These zones have surface locking widths of ~ 72 and ~ 75 km respectively from the Frontal to the Outer Lesser Himalaya, where no significant surface rupture and associated large earthquakes were observed for the last 100 years. However, strain reducing extensional deformation zone that appears sandwiched between the low strain-rate zones pose uncertainties on the occurences of large earthquakes in the locked zone. Nevertheless, such zone acts as a conduit to transfer strain from the compressional zone (> 100 nstrain/a) to the deforming frontal active fault systems. We also observed a curvilinear surface strain-rate pattern in the Chamoli cluster and explained how asymmetric crustal accommodation processes at the northwest and the southeast edges of the Almora Klippe, cause clockwise rotational couple on the upper crust moving over the MHT.

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Assessment of groundwater quality of Dehradun Valley, Uttarakhand, India, for drinking purposes using multivariate statistical techniques

Pundir¹,

Kandari²,

Singh³

et al. 2022

Environ Dev Sustain

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Quantifying seismic vulnerability, dynamical shear strain and liquefaction of the Quaternary deposits in the Doon valley near the Main Boundary Thrust in the Northwest Himalaya, India

Cited by 9 publications

References 39 publications

Evaluation of background radiation level and excess lifetime cancer risk in Doon valley, Garhwal Himalaya

Evaluation of background radiation level and excess lifetime cancer risk in Doon valley, Garhwal Himalaya

Crustal velocity and interseismic strain-rate on possible zones for large earthquakes in the Garhwal–Kumaun Himalaya

Assessment of groundwater quality of Dehradun Valley, Uttarakhand, India, for drinking purposes using multivariate statistical techniques

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