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Category: R.K. Chadha

Posted on January 18, 2016June 11, 2016

Why the May 12 Nepal quake is called an aftershock

The May 12, 2015 earthquake of 7.3 magnitude that struck 68 km west of Namche Bazar, close to Mount Everest is an aftershock of the April 25 Nepal quake of…

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Posted on January 18, 2016June 11, 2016

Himalayas: next major quake may be west of the recent one

“In future, if any earthquake were to happen along the Himalayas, it may happen further west of the focus of the main April 25 quake,” said Dr. R.K. Chadha, Chief…

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Posted on January 11, 2016

A shallow quake but high magnitude

Published in The Hindu on September 1, 2012 The 7.6-magnitude quake that occurred at a depth of nearly 34 km below the ocean floor was due to the Pacific plate…

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Posted on January 11, 2016January 11, 2016

April 11 quake: Distance from epicentre protects Indian cities

Published in The Hindu on April 13, 2012 If the amount of energy released during an earthquake is measured in terms of magnitude, its effects on the earth’s surface are…

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Posted on January 11, 2016January 11, 2016

Why the April 11 quake was caused by a strike-slip fault

Published in The Hind on April 13, 2012 Besides the subduction zone (where the Indian plate dives under the Burmese plate) that lies to the west of Indonesia, the Indian…

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Posted on January 11, 2016

Sumatra quake: Why there was no tsunami

Published in The Hindu on April 12, 2012 The U.S. Geological Survey (USGS) initially estimated Wednesday’s earthquake off the west coast of Northern Sumatra, at 8.9 magnitude. But it was…

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Posted on December 12, 2015

Quakes: of prediction, coincidence and panic

Published in The Hindu on September 14, 2006 Next time when someone predicts an earthquake with great certainty and specifies the exact time, location and magnitude, take it with a…

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Posted on December 12, 2015

Tsunami: role of mega thrust confirmed

Published in The Hindu on December 22, 2005 One year after the killer waves struck havoc that killed hundreds of thousands of people, the answers for what actually caused the…

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