洞体形变观测的潮汐参数及稳定性研究
|
摘要
利用潮汐分析方法,分析评价马陵山地震台洞体形变观测资料的潮汐参数及稳定性,结果表明:①3台倾斜仪的观测精度m_r均小于0.02,垂直摆倾斜仪和水管倾斜仪精度相当,水平摆倾斜仪精度稍低;相对噪声水平M_1均小于0.02″,垂直摆倾斜仪最小,年变化较稳定,水平摆倾斜仪噪声最大,水管倾斜仪次之,达到并超过中国地震局形变优秀台标准;②马陵山地震台伸缩仪的δα_(M2)/α_(M2)值,NS向优于泰安地震台,EW向低于泰安地震台,但均符合形变Ⅰ类台标准;马陵山地震台和泰安地震台伸缩仪的潮汐参量EW向的稳定性均不如NS向;仪器改造后噪声水平M_1明显降低,小于泰安地震台;③马陵山地震台仪器方位角存在较大偏差。
The tide analysis method was used to analyze and assess tidal parameters and stability of cavity deformation observation in Malingshan Seismic Station.The results showed that:①Observation aecuracy(m_r) of three instruments is all less than 0.02,accuracy of the vertical pendulum tiltmeter is the sams as the water tube tiltmeter,accuracy of the level pendulum tiltmeter is a little low;Noise level(M_1) is all less than 0.02 angle seconds.The noise level(M_1) of vertical pendulum tiltmeter is the lowest i(M_1).Its annual cycle is quite stable.The noise level of level pendulum tiltmeter is the largest,and that of water tube tiltrneter is the second.The observation accuracy of all observation instruments satisfy and surpass the standard of excellent deformation stations of China Earthquake Administration;②The delta alpha M2/alpha M2 of SS-Y extensometer is better than Tai'an Seismic Station in NS component.It is lower than Tai'an Seismic Station in EW component,but it all surpassed the standard of class 1deformation stations of China Earthquake Administration;The stability of tidal parameters of SS-Y extensometers in Malingshan Seismic Station and Tai'an Seismic Station is different,the EW component is all not so stable as NS component.The noise level(M_1) is decreased obviously after transformation.It is lower than Tai'an Seismic Station;③The study indicated that there is obvious deviation for azimuth in station.
The tide analysis method was used to analyze and assess tidal parameters and stability of cavity deformation observation in Malingshan Seismic Station.The results showed that:①Observation aecuracy(m_r) of three instruments is all less than 0.02,accuracy of the vertical pendulum tiltmeter is the sams as the water tube tiltmeter,accuracy of the level pendulum tiltmeter is a little low;Noise level(M_1) is all less than 0.02 angle seconds.The noise level(M_1) of vertical pendulum tiltmeter is the lowest i(M_1).Its annual cycle is quite stable.The noise level of level pendulum tiltmeter is the largest,and that of water tube tiltrneter is the second.The observation accuracy of all observation instruments satisfy and surpass the standard of excellent deformation stations of China Earthquake Administration;②The delta alpha M2/alpha M2 of SS-Y extensometer is better than Tai'an Seismic Station in NS component.It is lower than Tai'an Seismic Station in EW component,but it all surpassed the standard of class 1deformation stations of China Earthquake Administration;The stability of tidal parameters of SS-Y extensometers in Malingshan Seismic Station and Tai'an Seismic Station is different,the EW component is all not so stable as NS component.The noise level(M_1) is decreased obviously after transformation.It is lower than Tai'an Seismic Station;③The study indicated that there is obvious deviation for azimuth in station.
引文
冯建琴,沈晓松,董甲弟,等.山西数字化水管倾斜仪观测资料质量分析[J].地震地磁观测与研究,2011,32(3):102-103.
卢双苓,于庆民,郝军丽,等.影响形变观测质量的原因探讨[J].地震地磁观测与研究,2012,33(5/6):261-266.
杨又陵,马世贵,李晓东,等.新疆数字化形变观测的潮汐参数及稳定性分析[J].内陆地震,2009,23(2):107-115.
中国地震局监测预报司.地震及前兆数字观测技术规范—地形变测量[M].北京:地震出版社,2008.
卢双苓,于庆民,郝军丽,等.影响形变观测质量的原因探讨[J].地震地磁观测与研究,2012,33(5/6):261-266.
杨又陵,马世贵,李晓东,等.新疆数字化形变观测的潮汐参数及稳定性分析[J].内陆地震,2009,23(2):107-115.
中国地震局监测预报司.地震及前兆数字观测技术规范—地形变测量[M].北京:地震出版社,2008.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心