摘要
This paper analyzes the characteristics of time sequence changes of gravity points near the epicenter,different changes of measuring lines and gravity changes of measuring areas in point-line-area manner respectively with the 5-period mobile gravity data through densified observation by the South Xinjiang Observation Network after the 2015-2016 Akto earthquake in Xinjiang. The gravity observation results before the earthquake indicate that the Wuqia-Bulungkol area near the epicenter presented the trend of gravity value increasing since 2015,but the gravity value decreased half a year before the earthquake,and witnessed a high gradient zone of gravity changes during some periods before the earthquake. The gravity observation results after the earthquake show that there is a trend of opposite changes in gravity difference on the northern and southern sides of Bulunkou,and good correspondence exists between the characteristics of gravity field changes near the epicenter before and after the earthquake and the geologic structure distribution in the area.
This paper analyzes the characteristics of time sequence changes of gravity points near the epicenter,different changes of measuring lines and gravity changes of measuring areas in point-line-area manner respectively with the 5-period mobile gravity data through densified observation by the South Xinjiang Observation Network after the 2015-2016 Akto earthquake in Xinjiang. The gravity observation results before the earthquake indicate that the Wuqia-Bulungkol area near the epicenter presented the trend of gravity value increasing since 2015,but the gravity value decreased half a year before the earthquake,and witnessed a high gradient zone of gravity changes during some periods before the earthquake. The gravity observation results after the earthquake show that there is a trend of opposite changes in gravity difference on the northern and southern sides of Bulunkou,and good correspondence exists between the characteristics of gravity field changes near the epicenter before and after the earthquake and the geologic structure distribution in the area.
基金
the NaturalScience Foundation of Xinjiang Uygur Autonomous Region(2016D01A062)
Seismic Situation Tracking and Orientation Tasks(2016010218,2017010204)
Earthquake Science Foundation of Xinjiang(201613,201612)
the National Natural Science Foundation of China(41474016,41374030)
Earthquake Science and Technology Spark Plan(XH16042Y,XH17044)
作者简介
Ailixiati Yushan,born in 1984,is an engineer at the Earthquake Agency of Xinjiang Uygur Autonomous Region.He obtained his Master s degree from China University of Geosciences(Wuhan)in 2011,majoring in Cartography and Geographical Information Engineering.He is mainly engaged in gravity measurement and seismic trend analysis.E-mail:irxat@163.com。
