文章摘要

文章信息/Info

Title:: Coseismic Response Characteristics of Water Level in Simao Dazhai Well,Yunnan

Author(s):: MAO Weiying; (Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)

Keywords:: the Simao Dazhai Well; water level; coseismic response; uplift with steps; Yunnan

摘要:: 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。

Abstract:: 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.