Review
Geography, Physical
Girish Ch Kothyari, Raj Sunil Kandregula, Bahadur Singh Kotlia, Abhishek Lakhote, K. V. Swamy, Vamdev Pathak, Gaurav Chauhan, M. G. Thakkar
Summary: This study excavated six trenches to reveal seismic activity along the Kachchh Mainland Fault, identifying multiple paleoearthquakes over tens of thousands of years. The results show the slip rate and geometric characteristics of the active fault, providing important insights for seismic hazard assessment and microzonation studies in the Kachchh region.
QUATERNARY INTERNATIONAL
(2021)
Article
Geosciences, Multidisciplinary
Laxmi Gupta, Navdeep Agrawal, Jagabandhu Dixit
Summary: Probabilistic seismic hazard analysis was conducted for the seismically active National Capital Region (NCR) of India to quantify peak ground acceleration (PGA) values. The results showed varying PGA values in different probability exceedances, with higher seismicity observed in the eastern and southeastern regions due to proximity to active fault zones.
GEOMATICS NATURAL HAZARDS & RISK
(2021)
Article
Geosciences, Multidisciplinary
Prantik Mandal
Summary: Seismic tomography in the Kachchh rift zone of India reveals a semi-circular region of lower seismic velocities and increased seismic velocities, which align well with areas of alkaline magmatism linked to the Deccan plume. This suggests a direct connection between this magmatism and the Deccan mantle plume, supporting the presence of a crystallized magma-conduit related to the 65 Ma Deccan mantle plume. Additionally, majority of M ≥ 5 seismic events in the region fall within this crustal anomaly, indicating the importance of mapping crustal and lithospheric structures in assessing intraplate seismic hazards.
Article
Geography, Physical
Abhishek Lakhote, M. G. Thakkar, Raj Sunil Kandregula, Girish Ch Kothyari, Gaurav Chauhan
Summary: This study describes the active tectonic features of the eastern segment of the South Wagad Fault Zone (SWFZ) of the Kachchh Rift Basin, including mountain ranges, domes, and anticlines as well as structural changes and active landscapes. The research findings indicate that the eastern segment of the SWFZ may experience marginal uplift during the Middle to Late Holocene period, potentially leading to a large earthquake similar to the 2001 Bhuj earthquake.
QUATERNARY INTERNATIONAL
(2021)
Article
Geosciences, Multidisciplinary
Weijin Xu, Jian Wu, Mengtan Gao
Summary: Based on the seismic source model and seismic hazard analysis method, this study constructed a new time-dependent seismic source model of China's mainland and calculated the seismic hazard. The results show that the seismic hazard in certain seismic source areas is higher than the existing seismic zonation map. These findings can be used for future seismic risk assessments.
INTERNATIONAL JOURNAL OF DISASTER RISK SCIENCE
(2023)
Article
Environmental Sciences
Pankaj Prasad, Victor Joseph Loveson, Sourav Mandal, Priyankar Chandra, Luc Cimusa Kulimushi
Summary: The aim of this research is to create a multi-resource potentiality map and a multi-hazard susceptibility map by synthesizing the three natural resources (groundwater, wetland, and forest) and three natural hazards (flood, landslide, and shoreline erosion). The results show that forest and groundwater are the major resources in the research area, while flood is the most destructive hazard.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Salvatore Iacoletti, Gemma Cremen, Carmine Galasso
Summary: The study reviews the modeling assumptions in fault-based probabilistic seismic hazard analysis and proposes a framework to integrate these assumptions, revealing the significant impact of segmentation assumptions and fault interactions on seismic hazard estimates.
EARTH-SCIENCE REVIEWS
(2021)
Article
Environmental Sciences
S. Vazeed Pasha, C. Sudhakar Reddy
Summary: The invasive species Prosopis juliflora has spread extensively in Kachchh Biosphere Reserve, posing a significant threat to the local ecosystem. The findings of this study provide important baseline information for conservation planners and managers.
JOURNAL OF THE INDIAN SOCIETY OF REMOTE SENSING
(2023)
Article
Geography, Physical
Girish Ch Kothyari, Sneha Mishra, Ajay Kumar Taloor, Raj Sunil Kandregula, Vamdev Pathak, Gaurav Chauhan
Summary: This study focuses on the distribution of neotectonic variability between the western segment of the Kachchh Mainland Fault (KMF) and the Vigodi Fault (VF) in Western India. By using conventional morphometric parameters and DInSAR results, active deformation within the central portion of the western KMF and VF zone has been identified. This research is of great significance for seismic hazard assessment and future infrastructure planning.
QUATERNARY SCIENCE ADVANCES
(2022)
Article
Environmental Sciences
Gopal Krishan, Srijita Ghosh, Hardev Singh Virk
Summary: The hydrosphere, although covering almost 70% of the Earth, only contributes 3% of fresh water, with groundwater accounting for nearly 98%. Arsenic is a natural pollutant released in groundwater and long-term exposure to it can cause severe health issues. This study focuses on the major cause of high arsenic concentration in groundwater and its correlation with intensive agriculture in the Rupnagar district.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Geochemistry & Geophysics
Biswajit Mandal, V. Vijaya Rao, P. Karuppannan, K. Laxminarayana, Sumer Chopra, M. Ravi Kumar, Prakash Kumar
Summary: Deep crustal seismic reflection profiling was conducted for the first time across various tectonic domains of the seismically active Kachchh rift basin. The seismic data provided images of shallow and deep subsurface structures, revealing a 15 km thick subhorizontal lower crustal reflection fabric and crustal-scale domal-type structure. The thickness of sediments and crustal thickness vary greatly from north to south, with the Kachchh rift basin exhibiting an unusually thick crust of 45 km. The study suggests that the magmatic underplating and crustal thickening are attributed to syn-rifting and Reunion mantle plume activity.
Article
Geochemistry & Geophysics
Sapna Ghavri, Rajeev Kumar Yadav, Sridevi Jade
Summary: The Kachchh paleo-rift basin in western India is highly active and prone to earthquakes. Its seismic hazard potential has been analyzed through the study of geodetic and seismic strain rates, indicating a high rate of strain build-up and the potential for devastating earthquakes.
Article
Geosciences, Multidisciplinary
Salma Ommi, Milad Janalipour
Summary: In this study, probabilistic aftershock hazard analysis and ranking methods based on environmental factors were used to determine the optimal locations for building shelters after the earthquake in Iran.
Article
Geochemistry & Geophysics
Charu Kamra, Sumer Chopra, R. B. S. Yadav
Summary: The study determines the focal mechanism solutions and source parameters of recent earthquakes in the northeastern region of India. The tectonics in the region are complex due to compressional forces from all sides caused by the collision of plates. The focal mechanisms are used to understand the stress field in the region, revealing different tectonic regimes in different subregions. The stress drop of the earthquakes is found to be dependent on the focal mechanism type, seismic moment, and hypocentral depths, and the results are compared with another region in western India.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Engineering, Geological
Mohammad Talebi, Abbas Sivandi-Pour, Shamseddin Esmaeili, Mohammad Reza Soghrat, Hamidreza Safizadeh, Ehsan Ebrahimi, Mahdieh Akbarpoor, Rabe Sharifi Rad, Manoochehr Fallah, Ehsan Noroozinejad Farsangi
Summary: This study presents the spatial distribution of a grid-based probabilistic seismic hazard model at the surface level for the Kerman region in central-east Iran, using a hybrid site condition model. The model captures uncertainties of seismic hazard sources through a logic tree approach and demonstrates a wide range of seismic hazards in the region. In addition, various ground motion prediction equations have been evaluated for their compatibility with the studied area through statistical analyses.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)