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Temporal variation of gravity-field in North China before and after the 2011 Japan Mw9. 0 earthquake 被引量:1

Temporal variation of gravity-field in North China before and after the 2011 Japan Mw9. 0 earthquake
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摘要 By using absolute and relative-gravity data recorded by the gravity network in North China, we obtained some large-scale and high-spatial-resolution images of gravity variation in this area for the first time. By analyzing these images, we found that the gravity in Liaodong peninsula area showed an obvious increase of 80 × 10^-8ms^-2 during about one- and-half year before the 2011 Japan Mwg. 0 earthquake, and a rapid decrease after the earthquake. This gravity variation is similar to that observed previously for the 1976 Tangshan 1147.8 earthquake. By using absolute and relative-gravity data recorded by the gravity network in North China, we obtained some large-scale and high-spatial-resolution images of gravity variation in this area for the first time. By analyzing these images, we found that the gravity in Liaodong peninsula area showed an obvious increase of 80 × 10^-8ms^-2 during about one- and-half year before the 2011 Japan Mwg. 0 earthquake, and a rapid decrease after the earthquake. This gravity variation is similar to that observed previously for the 1976 Tangshan 1147.8 earthquake.
出处 《Geodesy and Geodynamics》 2011年第4期10-15,共6页 大地测量与地球动力学(英文版)
基金 supported by the Special Social Commonweal Research of the State( 2005DIB3J120) the Director Foundation of the Institute of Seismology,China Earthquake Administration ( IS200956045) Special Foundation for Earthquake Monitoring and Tracing in North China
关键词 gravity network of North China Japan Ms9.0 earthquake gravity variation gravity network of North China Japan Ms9.0 earthquake gravity variation
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