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岱海断陷带地区地震重新定位研究?
Relocation of the Earthquakes in Daihai Fault Zone
- DOI:
- 作者:
- 张帆 刘芳 张晖
ZHANG Fan, LIU Fang, ZHANG Hui
- 作者单位:
- 内蒙古地震局 010051呼和浩特
Earthquake Administration of Inner Mongolia Autonomous Region, 010051, Hohehot
- 关键词:
- 双差定位；震源深度；岱海断陷带
Double Ddifference Algorithm；Focal Depth；Daihai Fault Zone
- 摘要:
- 简采用双差定位，对岱海断陷带及周边地区2008-2013年地震事件进行重新定位及震源深度研究。重新定位后地震在空间分布上更加集中，部分地震有向构造带趋近的变化，较多的地震呈簇集状出现于多条断裂的交汇部位，西南段地震较活跃，不同部位地震数目有明显差异，构造活动存在分段特征，震源密集地区的分布走向明显，可以推测岱海断陷带西南端存在东西走向和东南走向的发震构造。震源深度结果表明，地震震源深度集中在5-15Km，均值为7Km。岱海断陷带西南段地震震源深度大于东北段，反映出地壳厚度的不均匀。
We relocate earthquakes occurred in Daihai fault zone from 2001 to 2013 using double-difference method．The result shows that the earthquakes are more spatially concentrated and in some areas the earthquakes tend to get close to tectonic belts．East-west and south-east seismogenic structures may exit in Southwest section．The average hypocenter depth is 7 kmand the seismogenic layer ranges from5 kmto15 km．The earthquakes in Southwest section are deeper,which Reflects the crustal thickness unevenness.
