地震研究

云南地区中小震分布的活动构造意义^*

杨润海,王彬,庞卫东,郑定昌

(云南省地震局,云南昆明 650224)

关键词：云南地区; 中小地震; 空间分布; 活动构造

Activity Tectonic Significance of Spatial Distribution of Small and Moderate Earthquakes in Yunnan Area

YANG Run-hai,WANG Bin,PANG Wei-dong,ZHENG Ding-chang

(Earthquake Administration of Yunnan Province,Kunming 650024,Yunnan,China)

Keywords：Yunnan area; small and moderate earthquake; spatial distribution; active tectonic

备注

收稿日期:2013-11-15
基金项目:云南省政府十项措施“云南强震活动与板缘动力学机制研究”(JCYB-20080601-4)和“地球物理场和化学场动态变化与强震活动关系研究”(JCYB-20080601-7)联合资助.

摘要

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参考文献

利用2000年1月至2010年11年间云南地震台网有定位结果的19 737个中小地震和从公元前20年至2009年11月共567次破坏地震震中,探讨云南地区地震空间分布与构造活动的关系,结果表明:地震震中密集分布地带是现今活动构造主要位置,地震震中的空间分布具有明显的活动构造意义。

Basing on 19 737 small and moderate earthquakes with the location results which was recorded by Yunnan Seismic Network(YEN)from Jun.,2000 to Nov.,2010,and the epicenter of 567 destructive earthquakes from 20 BC to Nov.,2009,we discussed the relationship between spatial distribution of these earthquakes and the tectonic activity in Yunnan. The result shows that the concentrate distribution belt of the epicenter is the most important area in current active tectonic,therefore the spatial distribution of epicenters has the obvious tectonic significance.

引言
1 资料选取与处理
2 地震空间分布与活动构造关系
3 结论与讨论

图1 公元前26年至2009年云南地区576次M≥5.0破坏性地震震中<br/>Fig.1 Epicenter distribution of 576 M≥5.0 destructive earthquakes in Yunnan area form 26 BC to 2009

图1 公元前26年至2009年云南地区576次M≥5.0破坏性地震震中
Fig.1 Epicenter distribution of 576 M≥5.0 destructive earthquakes in Yunnan area form 26 BC to 2009

图2 1970～2009年云南地区212次M≥5.0破坏性地震震中<br/>Fig.2 Epicenter distribution of 212 M≥5.0 destructive earthquakes in Yunnan area from 1970 to 2009

图2 1970～2009年云南地区212次M≥5.0破坏性地震震中
Fig.2 Epicenter distribution of 212 M≥5.0 destructive earthquakes in Yunnan area from 1970 to 2009

图3 2000～2010年云南及邻区19 737次中小地震震中分布<br/>Fig.3 Epicenter distribution of 19 737 modorate and small earthquakes in Yunnan area from 2000 to 2010

图3 2000～2010年云南及邻区19 737次中小地震震中分布
Fig.3 Epicenter distribution of 19 737 modorate and small earthquakes in Yunnan area from 2000 to 2010

图4 2000～2010年云南及邻区19 737次中小地震震中及震源深度分布<br/>Fig.4 Epicenter and focal depth distribution of 19 737 earthquakes in Yunnan and its adjacent area from 2000 to 2010

图4 2000～2010年云南及邻区19 737次中小地震震中及震源深度分布
Fig.4 Epicenter and focal depth distribution of 19 737 earthquakes in Yunnan and its adjacent area from 2000 to 2010

图5 澜沧—耿马断裂两侧地震震源深度分布<br/>Fig.5 Focal depth distribution of earthquakes in the two sides of Lancang-Gengma Fault

图5 澜沧—耿马断裂两侧地震震源深度分布
Fig.5 Focal depth distribution of earthquakes in the two sides of Lancang-Gengma Fault

图6 楚雄—建水断裂两侧地震震源深度分布<br/>Fig.6 Focal depth distribution of earthquakes in the two sides of Chuxiong-Jianshui Fault

图6 楚雄—建水断裂两侧地震震源深度分布
Fig.6 Focal depth distribution of earthquakes in the two sides of Chuxiong-Jianshui Fault

图7 小江断裂带两侧地震震源深度分布<br/>Fig.7 Focal depth distribution of earthquakes in the two sides of Xiaojiang Fault

图7 小江断裂带两侧地震震源深度分布
Fig.7 Focal depth distribution of earthquakes in the two sides of Xiaojiang Fault

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