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The Earth reached its perihelion, or the closest point in its orbit around the Sun recently. Perihelion occurs in early January, about 2 weeks after the Winter Solstice.
11 January, 2024
Weathering and Erosion
The Earth reached its perihelion, or the closest point in its orbit around the Sun recently. Perihelion occurs in early January, about 2 weeks after the Winter Solstice.
11 January, 2024
Weathering and Erosion
The Winter Solstice is a phenomenon when the Northern Hemisphere is tilted furthest away from the sun, resulting in the longest night and the shortest day of the year. It occurs annually on December 21 or 22. It marks the 1st day of winter.
28 December, 2023
Weathering and Erosion
Glacial Lake Outburst Flooding A glacial lake outburst flooding (GLOF) occurs when a breach in the glacial lake causes a sudden surge downstream. Such lakes are formed when glaciers erode land, melt and over time become a large mass of water in the depression formed, and these can be breached, causing floods downstream. In India the status of glacial lakes is checked by Central Water Commission.
09 February, 2021
Weathering and Erosion
Balancing priorities Context: Landslide in Idukki district of Kerala has claimed 22 lives thus far and rendered several families homeless. Landslides in Kerala: Landslips or landslides have been a recurrent phenomenon in the Western Ghats state of Kerala. Data from the Geological Survey of India shows that Kerala has experienced 67 major landslide events and several minor ones from 1961-2013. In 2019, Wayanad district witnessed multiple landslides that claimed several lives and destroyed multiple hamlets. The National Landslide Susceptibility Mapping (NLSM) programme of the Geological Survey of India notes that nearly 13 of the State’s 14 districts are prone to…
10 August, 2020
Weathering and Erosion
Enhancing Erosion in the Himalayas Part of: GS-I- Geography (PT-MAINS-PERSONALITY TEST) Scientists and students from the Wadia Institute of Himalayan Geology (WIHG) have explored the Zanskar catchment area. The study was conducted to understand the landform evolution in transitional climatic zones, using morphostratigraphy, Optically Stimulated Luminescence (OSL) dating and provenance analysis of landforms like valley fill terraces and alluvial fans. Valley Fill Terrace: The fill terrace is created by either a stream or river that starts to incise into the material that it deposited in the valley. Once this occurs benches composed completely of alluvium form on the sides of the valley. The uppermost benches are the fill terraces. Alluvial Fans: Triangle-shaped…
06 May, 2020
Weathering and Erosion
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