地震研究

对1988—2017年云南思茅大寨井水位不同震级、不同震中距地震的同震响应分析,发现思茅大寨水位具有较好的地震响应能力,不仅对台站附近10 km范围内的3～4级近震有响应,对云南及周边地区7级以上地震和震中距大于2 000 km的8级以上地震也具有响应能力。研究发现,长期以来,大寨井水位对地震的响应一直保持为同震阶变的上升模式,不受震源机制、发震构造等因素影响。大寨井水位对不同震级地震出现同震响应所对应的震中距分别为:5.0～5.9级地震120 km、6.0～6.9级地震300 km、7.0～7.9级地震700 km、8.0～8.9可达3 000 km。

Based on the coseismic response of water level at Simao Dazhai well in Yunnan province to earthquakes with different magnitudes and epicentral distances from 1988 to 2017,we found that the water level at Simao Dazhai well has shown good coseismic response to certain earthquakes,which include 3≤M≤4 earthquakes within 10 km from the well,M≥7 earthquakes in Yunnan and its adjacent area,and M≥8 earthquakes beyond 2 000 km from the well. The coseismic responses of water level in Dazhai Well shows uplift with steps since 1988,which is not affected by focal mechanism and seismogenic structure. The epicentral distances corresponding to coseismic response of water level in Dazhai well to M5.0～5.9,M6.0～6.9,M7.0～7.9,M8.0～8.9 earthquakes are120 km,300 km,700 km,3 000 km respectively.

引言
1 观测井概况和资料选取
2 同震响应特征分析
3 结论

图1 思茅大寨井井孔柱状图
Fig.1 The Geological profile map ofSimao Dazhai Well

图2 思茅大寨水位日均值曲线和月降雨量图<br/>Fig.2 The daily mean curve of water level of Simao Dazhai Station and monthly raining

图2 思茅大寨水位日均值曲线和月降雨量图
Fig.2 The daily mean curve of water level of Simao Dazhai Station and monthly raining

图3 思茅大寨井对部分地震同震响应图<br/>Fig.3 Some coseismal response samples of water level in Simao Dazhai Well

图3 思茅大寨井对部分地震同震响应图
Fig.3 Some coseismal response samples of water level in Simao Dazhai Well

表1 思茅大寨水位同震响应一览表<br/>Tab.1 Coseismal response of water level of Simao Dazhai Well

表1 思茅大寨水位同震响应一览表
Tab.1 Coseismal response of water level of Simao Dazhai Well

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备注

引言

1 观测井概况和资料选取

2 同震响应特征分析

3 结论

期刊信息