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 Scientist at the Hyderabad-based National Geophysical Research Institute. That is because the 7.8 magnitude April 25 quake was caused by a unidirectional fracture. From the … Continue reading Himalayas: next major quake may be west of the recent one

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 expressed in terms of intensity. Unlike magnitude that is determined using an instrument, intensity is measured only by effects felt by people. The one widely … Continue reading April 11 quake: Distance from epicentre protects Indian cities

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 Ocean has a diffused seismicity zone. This zone lies to the west of the subduction zone. The east-west trending zone extends from 80 degree East … Continue reading Why the April 11 quake was caused by a strike-slip fault

Editorial: Prediction gets tougher

Published in The Hindu on October 24, 2009 Despite years of unrelenting efforts, predicting earthquakes — the holy grail of seismology — has only got tougher. A series of high magnitude earthquakes that struck different parts of the globe in recent years has made scientists realise that rocks respond to strain and seismic waves in … Continue reading Editorial: Prediction gets tougher

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 pinch of salt. More so, if it is predicted to happen in a few days' time. A recent prediction by N. Venkatanathan who had done … Continue reading Quakes: of prediction, coincidence and panic

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 tsunami have been documented by Discovery Channel. The study proved conclusively that it was a mega thrust — a large-scale rupturing and vertical displacement of … Continue reading Tsunami: role of mega thrust confirmed