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PROCEEDINGS OF JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM
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P.N. Agrawal
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GREAT NICOBAR INDIA EARTHQUAKE OF JANUARY 20, 1982
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The Alpide Himalayan seismic belt passes through the Andaman and Nicobar group of islands,I.e.,a non volcanic island arc in the Bay of Bengal, India. The Great Nicobar is located to the south of the ten degree channel and was visited by a 6.5 (Ms) magnitude earthquake on January 20, 1982. The earthquake has caused ground fissuring at several locations on the east coast to the south of Campbell Bay. The phenomena of soil liquefaction has resulted in tilting of concrete pile foundations of Campbell Bay jetty, in tilting of timber piles of a road bridge over a river and bringing of fine sands to surface through fissures. A survey of the damage to the jetty, a bridge and various buildings has been conducted during the first week of February 1982. The paper describes the results of the damage survey and the isoseismal map prepared for the earthquake. Other earthquake related observations are also reported. The study is expected to result in several improvements in the construction practices adopted in the region.
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