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Soil Liquefaction in Japan

What is soil liquefaction? Causes, effects and measures

“A Phenomenon whereby a saturated or partially saturated soil substantially loses strength and stiffness in response to an applied stress, usually earthquake shaking or other sudden change in stress condition, causing it to behave like a  liquid” is called Soil Liquefaction (Hazen,1918). There are two types of soil liquefaction. 1) Flow liquefaction 2) Cyclic Mobility […]

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Earthquake Safety Tips – Surviving a Quake

Nothing beats alertness. Here are a few earthquake safety tips which will maximise your chances of survival. You can begin by finding out all you can about the earthquake risk in your area. Back that up by contacting the state geological survey offices, or other local disaster management offices. Be a leader in mapping the safest […]

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Seismological research and geosciences

Seismology research is the scientific study of earthquakes and the propagation of elastic waves through the earth or through other planet-like bodies. The research also includes studies of the environmental effects of earthquakes, such as tsunamis and other seismic phenomena such as volcanic, tectonic, oceanic, and atmospheric explosions. A related field that uses geology to infer […]

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tsunami, coastal india, scenery of india, water body, sea, ocean

Pre-earthquake Process and the 2004 Tsunami

The disastrous earthquake-triggered tsunami that occurred 11 years ago on the morning after Christmas was huge by any contemporary standards. The epicenter of magnitude 9.3 quake was located in the Indian Ocean near the west coast of Sumatra and it ruptured the 1000 km long Andaman plate boundary, moving the seafloor 20-10 m vertically upwards, […]

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Traditional Genius and Earthquakes

Just as other tectonically active regions of the world, Uttarakhand too has witnessed devastating earthquakes in 1720 (Kumaun Earthquake), 1803 (Garhwal Earthquake), besides the Uttarkashi and Chamoli earth-quakes in 1991 and 1999. Despite these, hundred year old multi-storied houses are common in the region. Barring cattle sheds, single storied structures are practically never built. Both […]

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Earthquakes in India

The regions far away from the Himalaya and other inter-plate boundaries, which were once considered to be relatively safe from strong shaking, have also experienced several devastating earthquakes. The huge loss of life and property in the earthquake-prone areas of the country have shown that the built-environment is extremely fragile, and country’s ability to respond […]

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Working towards saving earth

Dr Shailesh Nayak in conversation with the editor offers insights on issues of sustainability and scientific integration in order to create solutions in a changing climate regime. ‘Earth System Science’ – the mandate area of the Ministry of Earth Sciences (MoES) includes the atmosphere, hydrosphere, cryosphere and geosphere and encompasses a range of activities. Please […]

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