کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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4683621 | 1349325 | 2012 | 8 صفحه PDF | دانلود رایگان |
:Based on the data of the repeated gravity observation network in Chinese mainland since 1998, we analyzed the temporal changes of regional gravity field before the 2008 Yutian Ms7. 3 earthquake. The result shows some mid-to-long term (two to ten years) changes during the earthquake’s preparation. Notable features are a gravity increase lasting several years and a relatively large-scaled gradient zone of gravity change, the former indicating a continuous energy accumulation and the latter a possible location of seismic rupture. These gravity changes showed a trend of increase-accelerated increase-decelerated increase, similar to that of the Tangshan Ms7. 8 earthquake in 1976. The maximum accumulated gravity change related to the earthquake reached 200 × 10 − 8 ms− 2.
Journal: Geodesy and Geodynamics - Volume 3, Issue 1, February 2012, Pages 19–26