[1]ZHANG Xi,XUE Fu-ping,WANG Ji-ying.Time Sequence Features of Fault Deformation of Main Fractures in the Northeastern Margin of Qinghai-Tibet Block and Their Relationship with Strong Earthquakes[J].Journal of Seismological Research,2009,32(01):1-5.
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Time Sequence Features of Fault Deformation of Main Fractures in the Northeastern Margin of Qinghai-Tibet Block and Their Relationship with Strong Earthquakes
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
32
Number of periods:
2009 01
Page number:
1-5
Column:
Public date:
2009-01-23
- Title:
- Time Sequence Features of Fault Deformation of Main Fractures in the Northeastern Margin of Qinghai-Tibet Block and Their Relationship with Strong Earthquakes
- Keywords:
- cross-fault strain intensity ratio; time sequence change; difference between fault segments; example of earthquake; northeastern margin of Qinghai-Tibet Block
- CLC:
- P315.72+5
- DOI:
- -
- Abstract:
- We study the dynamic evolution features of the tectonic deformation of main active faults in the northeastern margin of Qinghai-Tibet Block,the difference between fault segments,and their relationship with the development and occurrence of strong earthquakes,using the strain intensity ratio values calculated from mobile cross-fault short-leveling observational data from the late 1980s to the end of 2007.The results are as follows:① Nearly all strain intensity ratio-time curves of faults or segments reflect the process as“obviously rising-rising to peak above average line-dropping” in several months to about one year before the earthquakes with M≥5.8 on the fault(segment)or nearby.The distinct difference of strain intensity ratio between faults or segments has certain prediction significance for the strong earthquakes in the meeting region of faults(segments)or nearby.② The northeastern margin of Qinghai-Tibet Block,especially the Qilianshan-Haiyuan fault zone and the northern margin fault of the West Qinling mountains,shows a new round of energy accumulation through the adjustment of tectonic stress field after the West Kunlun,Yumen,and Minle earthquakes.
- References:
- -
- Similar References:
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Last Update:
2009-01-23