"Earthquakes: How to cope with them" a talk by Dr. Harsh K. Gupta at Teen Murti House, Teen Murti Marg > 3pm on 5th December 2013

Time : 3:00 pm

Entry : Free (Seating on First-Come First-Served basis)

Place : Seminar Room, Library Building, Nehru Memorial Museum & Library (NMML), Teen Murti House, Teen Murti Marg, New Delhi - 110011
Venue Info :  Events About Map | Nearest Metro Station - 'Race Course(Yellow Line)'

Event Description : The Nehru Memorial Museum and Library cordially invites you to a Public Lecture (in the ‘Science, Society and Nature’ series) on ‘Earthquakes: How to cope with them’ by Dr. Harsh K. Gupta, National Disaster Management Authority, New Delhi.

Abstract : Earthquakes are one of the worst natural calamities. In the recorded history, millions of human lives are lost and the economic losses amount to 100s of billions of dollars. We are in the 13th year of the 21st Century and the human lives lost in this short span, has already exceeded the total lives lost in the entire 20th century due to earthquakes. In this talk, three important developments shall be presented. The first and the foremost is the generation of earthquake awareness and building earthquake scenarios. As is known, earthquakes repeat where they had occurred earlier. The Himalayan seismic belt has been very active. During a short span of 53 years, from 1897 through 1950, 4 great earthquakes (M~8) occurred. These are the Shillong (1897), Kangra (1905), Bihar- Nepal (1934) and the Assam (1950) earthquakes. No such earthquake has occurred since then. This has given a false sense of security. It is helpful to generate earthquake scenarios and share this knowledge with the public. An important aspect is the safety of the life line buildings. Example of a recent scenario building for an M ~ 8 earthquake in western Himalaya is presented. It is found that the occurrence an M 8 earthquake with its epicenter at Mandi (close to the occurrence of the 1905 Kangra earthquake) could cause a loss of up to eight hundred thousand human lives if the earthquake occurs in the middle of the night. The second development is the successful deployment of the Early Tsunami Warning System by India. The 26th December Mw 9.2 after the occurrence 2004 India. The 26th December, 2004 Sumatra earthquake of Moment Magnitude (Mw) 9.2 is the third largest earthquake ever recorded all over the globe. The tsunami created by this earthquake has been the deadliest, having claimed over 250,000 lives and causing immense financial losses in the south and south-east Asian countries. The Tsunami Magnitude (Mt) for the tsunamis is estimated to be 9.5.  It claimed about 15000 lives in India. Amplitudes of 4.5 and 3.2 m were estimated at Port Blair and Chennai. A tsunami of this magnitude had been never recorded before on the Indian coasts. India undertook a very ambitious project to set up a state of art Tsunami warning capability in a short time of 30 months. This was achieved by end of August 2007, and tested by September 12, 2007 earthquake. Over the last six years the system has performed satisfactory. The third developments is in depth investigation of the artificial water reservoir triggered earthquake and effort to develop an earthquake model. Artificial water reservoirs have triggered earthquakes at over 100 sites globally. Triggered earthquakes exceeding M 6 have occurred in China, Zambia, Greece and India. Changes in the sub-surface pore fluid pressure regime and mechanical properties of the near-field zone are proposed to be the causative factors. A classical Reservoir Triggered Seismicity (RTS) site is Koyna, West Coast of India. Triggered earthquakes have been occurring in Koyna since the impoundment in 1962, including the largest RTS event of M 6.3 on December 10, 1967; 22 M > 5 earthquakes, and several thousand smaller ones. RTS increases following the monsoon rains and almost every year we have one or more M ~ 4 earthquakes. The shallow (mostly < 6 km) RTS is confined to a small area of 20 x 30 sq. km with no other seismic activity within 50 km of the Koyna Dam. The Koyna region was stressed close to critical before the impoundment of the Koyna Dam and the maximum credible earthquake for the region is M 6.8. It is estimated that more than one half of this energy has been released since impoundment and RTS will continue for many more years. The occurrence of M > 5 is governed by factors like rate of loading, highest water level reached, duration of retention of high water levels, and whether the previous water level maxima has been exceeded or not (Kaiser Effect). Nucleation precedes M ~ 4 earthquakes, and its real time monitoring has led to short term forecasts. Deep bore hole drilling and other geophysical/geological measurements and observation are underway to comprehend the genesis of triggered earthquake.

Speaker : Dr. Harsh K. Gupta is Member, National Disaster Management Authority, New Delhi. Dr. Gupta has studied several aspects of earthquakes. He chaired the Steering Committee of the Global Seismic Hazard Program (1992- 1999), an UN initiative where some 500 seismologists worked globally to develop the Global Seismic Hazard Map. He has published about 200 research papers, written 4 pioneering books (all published by Elsevier). His first book Dams and Earthquakes has been translated into Russian and Chinese languages. He has compiled and edited the Encyclopedia of Solid Earth Geophysics.
Dr. Gupta is currently President- International Union of Geodesy and Geophysics Member -Atomic Energy Regulatory Board; Member - Scientific and Technical Committee of UNISDR; and Member- Executive Committee of International Continental Drilling Program, and ILP Bureau Member for Life etc.  He is a Fellow of the leading Indian Science Academies; TWAS and the American Geophysical Union. Among several recognitions received by him include Shanti Swarup Bhatnagar Prize; USSR Academy of Sciences ‘100 years of International Geophysics’ Memorial Medal; CSIR Technology Prize for Business Development and Technology Marketing; Padma Shri; Waldo. E. Smith Medal Award of American Geophysical Union; National Ocean Award of Science and Technology etc.

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"Earthquakes: How to cope with them" a talk by Dr. Harsh K. Gupta at Teen Murti House, Teen Murti Marg > 3pm on 5th December 2013 "Earthquakes: How to cope with them" a talk by Dr. Harsh K. Gupta at Teen Murti House, Teen Murti Marg > 3pm on 5th December 2013 Reviewed by DelhiEvents on Thursday, December 05, 2013 Rating: 5

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