[1]LI Xia,LIU Lei,FENG Lili.Analysis on Geomagnetic Precursory Characteristics before Qinghai Menyuan MS6.4 Earthquake in 2016[J].Journal of Seismological Research,2016,39(增刊):122-127.
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Analysis on Geomagnetic Precursory Characteristics before Qinghai Menyuan MS6.4 Earthquake in 2016
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
39
Number of periods:
2016 Supplementary
Page number:
122-127
Column:
Public date:
2016-11-20
- Title:
- Analysis on Geomagnetic Precursory Characteristics before Qinghai Menyuan MS6.4 Earthquake in 2016
- Keywords:
- Menyuan MS6.4 earthquake; tilt; borehole strain; deformation anomalies
- CLC:
- P315.721
- DOI:
- -
- Abstract:
- Taking the juncture areas(30～41°N,90～107°E)of Qinghai,Gansu and Sichuan as the study area,we analyzed the anomalous changes before Menyuan earthquake from 2013 to 2015 by using the methods of geomagnetic vertical component load-unloading response ratio and daily variation amplitude ratio. The results showed that both load-unloading response ratio and daily variation amplitude radio of stations appeared high value along the fault zone and its adjacent area in 29 days before the Menyuan MS6.4 earthquake,and the spatial distribution of abnormal high values are relatively concentrated in the epicenter area. The epicenter is located in the transition zone of abnormal high and low values or the transition zone,showing a certain time and space synchronization. Compared with Minxian-Zhangxian MS6.6 earthquake,we found that the variation characteristics of load-unloading response ratio and daily variation amplitude ratio before two earthquakes are similar. So the daily variation of geomagnetic vertical component and the related calculation method have certain prediction efficiency in the short term.
- References:
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Last Update:
2016-10-20