Coda Q estimation for Kinnaur region and surrounding part of NW Himalaya

Kumar, Naresh; Yadav, Dhirendra Nath

doi:10.1007/s10950-018-9805-2

Cited by 8 publications

(3 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Значения добротности, полученные по коде S-волн, характерны для регионов с умеренной сейсмичностью. Они несколько выше значений, определённых в регионах с высокой сейсмичностью, например, в северо-западной части Гималаев [22] и в северо-восточном Иране [21], и сопоставимы с результатами, полученными для регионов с умеренной сейсмичностью, например, для восточной части Индийского кратона [14]. Это является подтверждением существенного сейсмического потенциала территории [8,11].…”

Section: обсуждение результатов и выводыunclassified

Seismic Wave Attenuation in the Lithosphere of Priamurye

Pupatenko¹

2023

View full text Add to dashboard Cite

We present the results of determining the attenuation parameters of seismic waves (seismic quality factor at a frequency of 1 Hz Q0 and frequency parameter n) in the lithosphere of Priamurye. We estimated the attenuation parameters on a regional scale using code of Lg surface waves, as well as their key and strongest spatial variations. The Q0 parameter varies from 380 in southern Primorye to 600 in northwestern Priamurye. Based on the code of body S-waves from nearby earthquakes recorded at the stations of the local seismological network of the Bureyskaya Hydropower Plant, we obtained the average estimates of the quality factor and frequency parameter for a region with a radius of a few hundred kilometers around the hydropower plant. For a window width of 20 s, Q0 = 103 and n = 0.806. These values are typical for the regions with moderate seismicity and confirm the significant seismic potential of the territory. The use of the information about actual attenuation parameters of seismic waves makes it possible to more accurately and more understandably relate the parameters of the sources of hypothetical earthquakes and the expected intensity of ground shaking caused by them, and thereby eliminates one of the significant simplifications inherent in general seismic zoning maps.

show abstract

Section: обсуждение результатов и выводыunclassified

Seismic Wave Attenuation in the Lithosphere of Priamurye

Pupatenko¹

2023

View full text Add to dashboard Cite

show abstract

“…Seismic wave attenuation study has been performed for the Kinnaur and Garhwal-Kumaun regions of the NW Himalaya using data of low magnitude-and micro-earthquake events (Kumar and Yadav, 2019;Kumari et al, 2020Kumari et al, , 2021Monika et al, 2020;Kumar P., et al, 2021). Attenuation characteristic divide the Kinnaur Himalaya into three zones correlating with crustal/lithosphere structure and micro-earthquake activity.…”

Section: Seismic Attenuationmentioning

confidence: 99%

INSA National Report on Seismological Research in India: 2019 – 2022

Manglik

2023

Preprint

View full text Add to dashboard Cite

The Indian National Science Academy (INSA), the National Adhering body representing India in the International Union of Geodesy and Geophysics (IUGG), submits a National Report to the IUGG during its General Assembly, held every four years. The present chapter is a compilation for the International Association of Seismology and Physics of the Earth's Interior (IASPEI), one of the eight Associations of the IUGG, encompassing the scientific activities carried out in the country during 2019-2022, in the field of seismology. The chapter is arranged to categorize the contributions under internal structure of the Indian lithosphere and sub-lithospheric mantle, crust and upper mantle deformation, seismic attenuation, seismic hazards, triggered seismicity, environmental seismology, paleoseismology and seismological networks. In addition, the chapter includes activities related to societal projects and outreach programs. It is not an exhaustive review of the entire Indian contribution to seismology and allied fields during this period but a window to the topics covered within the framework of IASPEI.During the reporting period, researchers from several Indian R&D and Academic Institutions continued adding new results on the crustal and upper mantle structure of the Indian shield, both at regional and geological province scale. The Himalaya has been a major focus of seismological research for many Institutes who operated broadband seismological networks from Kashmir to Arunachal along the Himalayan arc. The data from these networks have facilitated in enhancing our understanding of the structure of the Main Himalayan Thrust, crustal and upper mantle structure as well as the dip of the underthrusting Indian plate, seismicity monitoring, and estimation of attenuation. Some of these networks also include accelerographs for strong ground motion studies. A few studies also focused on mapping of the mantle transition zone beneath the Indian Ocean Geoid Low. The studies on anthropogenic seismicity added near-field investigations in the Koyna -Warna region through borehole seismology. Organization of the Joint Scientific Assembly of IAGA and IASPEI during 21-27 August 2021 (JSA-2021) was a major event during this period related to the IUGG activities. Originally, the event was planned to be hosted at Hyderabad, India, but due to the COVID-19 pandemic it was organized in virtual mode. Initiatives have been taken to nucleate the field of environmental seismology in the country.

show abstract

“…The region also faces multiple challenges due to extreme events and construction activities. Previous studies on this region have focused on the loss of medicinal plants [12][13][14][15], vulnerability assessments and land use change [3,[16][17][18], extreme events including earthquakes and landslides [19,20], and the impacts of hydropower dams [21][22][23]. All of these challenges together play a significant role in transforming the agriscapes in the region, especially due to the deterioration of water resources, biodiversity loss, and unsustainable construction activities.…”

Section: Introductionmentioning

confidence: 99%

MODIS NDVI Multi-Temporal Analysis Confirms Farmer Perceptions on Seasonality Variations Affecting Apple Orchards in Kinnaur, Himachal Pradesh

et al. 2021

View full text Add to dashboard Cite

Apple cultivation in the Kinnaur district of the northern Indian State of Himachal Pradesh faces challenges from climatic changes and developmental activities. Farmers in the neighboring districts have already faced a major loss of livelihood due to seasonal changes. Therefore, it is important to study the extent of seasonal variations in the apple growing locations of this region. This study makes that attempt by assessing seasonality variations during a 15-year period from 2004 to 2018 when maximum construction activities occurred in this region. The study uses geospatial and statistical techniques in addition to farmer perceptions obtained during a field visit in November 2019. A temporal pattern using a normalized difference vegetation index (NDVI) based on Moderate Resolution Imaging Spectroradiometer (MODIS) was studied for seven apple-growing locations in the district. The results show high seasonal variations and reduced snowfall at lower elevations, resulting in less chilling hours, which are necessary for the healthy growth of apples. The normalized difference snow index (NDSI) and rainfall show a high correlation with apple growth. Local farmers are unprepared for future seasonal disturbances, as they lack early warning systems, insurance for apple crops, and alternative livelihood options.

show abstract

Coda Q estimation for Kinnaur region and surrounding part of NW Himalaya

Cited by 8 publications

References 66 publications

Seismic Wave Attenuation in the Lithosphere of Priamurye

Seismic Wave Attenuation in the Lithosphere of Priamurye

INSA National Report on Seismological Research in India: 2019 – 2022

MODIS NDVI Multi-Temporal Analysis Confirms Farmer Perceptions on Seasonality Variations Affecting Apple Orchards in Kinnaur, Himachal Pradesh

Contact Info

Product

Resources

About