不同型号仪器水位记震能力对比分析
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摘要
通过对地震时不同型号仪器及不同采样率获取的水位观测曲线进行对比分析,结果显示:目前我国数字化水位观测的两种主要观测仪器ADP系统与LN-3(A)在记震能力上的差别主要是由采样率不同引起的,与仪器性能及水井的深度关系不大。由于水震波的持续时间一般只有几分钟,因此只有加大采样率,才能记录到波型更为完整的水震波和更为丰富的水震波震例。分析认为,数字化水位观测必须最终向实时记录的方向发展,才能更真实准确地反映地球内部应力的瞬时变化的真实信息,不至因采样率不足而使短周期信息遗漏,同时也更有机会捕捉到前驱波及区域应力场的变化。
This paper aims at the comparison of the observation at different water levels obtained from instruments of different models and sampling ratio when an earthquake occurred,the results show that:the differences of recording earthquake between the ADP system and LN-3(A),mainly used in our country at present,which are the two main observation apparatus used for Digital water level observing,are mainly caused by the differences of sampling ratio,having nothing to do with the performance of instrument and the depth of wells.We consider that the ability of recording earthquake of the water level is mainly determined by the sampling ratio when the other conditions are close by.Because of the duration of the water level oscillation is only a few minutes,in order to record more complete wave of water level oscillation,and obtain more abundant examples of water level oscillation,we must enlarge the sampling ratio.At last,we indicate that in order to make a true and accurate reflection of the Earth's interior stress changes with the instantaneous changes,the developing direction of real time digital water level observation,only in this way,avoiding the omission of short period information because of lacking of enough sampling ratio,and at the same time,having more chance to catch the precursor wave and the changes of regional stress field.
This paper aims at the comparison of the observation at different water levels obtained from instruments of different models and sampling ratio when an earthquake occurred,the results show that:the differences of recording earthquake between the ADP system and LN-3(A),mainly used in our country at present,which are the two main observation apparatus used for Digital water level observing,are mainly caused by the differences of sampling ratio,having nothing to do with the performance of instrument and the depth of wells.We consider that the ability of recording earthquake of the water level is mainly determined by the sampling ratio when the other conditions are close by.Because of the duration of the water level oscillation is only a few minutes,in order to record more complete wave of water level oscillation,and obtain more abundant examples of water level oscillation,we must enlarge the sampling ratio.At last,we indicate that in order to make a true and accurate reflection of the Earth's interior stress changes with the instantaneous changes,the developing direction of real time digital water level observation,only in this way,avoiding the omission of short period information because of lacking of enough sampling ratio,and at the same time,having more chance to catch the precursor wave and the changes of regional stress field.
引文
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陈大庆,刘耀炜.2006.我国在井—含水量水层系统对地震波同震响应方面的研究进展[J].国际地震动态,(7):27-31.
付虹,刘强,邬成栋,等.2007.印尼8.7、8.5级远震对云南地区小震的激发和地下流体异常响应初探[J].地震研究,30(2):7-13.
高小其,陈华静,杨又陵,等.2006.2004年12月26日印尼8.7级强震新疆地区的同震效应[J].地震地磁观测与研究,27(3):40-45.
黄辅琼,迟恭财,徐桂明,等.2000.大陆地下流体对台湾南投7.6级地震的响应研究[J].地震,20(S1):119-125.
张昭栋,迟镇乐,陈会民,等.1999a.水井含水层导水系数及其对地震波的响应[J].内陆地震,13(3):207-214.
张昭栋,迟镇乐,陈会民,等.1999b.水井的频率特性试验和对地震波的响应[J].地震学报,21(3):329-331.
张昭栋,迟镇乐,陈会民,等.2000.井水位的振荡与地震波[J].地震研究,23(4):418-425.
张昭栋,赵淑平,董传富.1994.井水位阶变与含水层所受体应力之间的定量关系[J].地球物理学报,37(增刊I):222-229.
中国地震局监测预报司.2005.2004年印度尼西亚苏门答腊8.7级大地震及其对中国大陆地区的影响[M].北京:地震出版社.
车用太,王铁城,鱼金子.1989.我国水震波研究的现状与动向[J].地震,9(1):70-72.
车用太,鱼金子.1992.地下水动态映震机制的试验与观测研究[J].地震研究,l5(2):171-179.
陈大庆,刘耀炜.2006.我国在井—含水量水层系统对地震波同震响应方面的研究进展[J].国际地震动态,(7):27-31.
付虹,刘强,邬成栋,等.2007.印尼8.7、8.5级远震对云南地区小震的激发和地下流体异常响应初探[J].地震研究,30(2):7-13.
高小其,陈华静,杨又陵,等.2006.2004年12月26日印尼8.7级强震新疆地区的同震效应[J].地震地磁观测与研究,27(3):40-45.
黄辅琼,迟恭财,徐桂明,等.2000.大陆地下流体对台湾南投7.6级地震的响应研究[J].地震,20(S1):119-125.
张昭栋,迟镇乐,陈会民,等.1999a.水井含水层导水系数及其对地震波的响应[J].内陆地震,13(3):207-214.
张昭栋,迟镇乐,陈会民,等.1999b.水井的频率特性试验和对地震波的响应[J].地震学报,21(3):329-331.
张昭栋,迟镇乐,陈会民,等.2000.井水位的振荡与地震波[J].地震研究,23(4):418-425.
张昭栋,赵淑平,董传富.1994.井水位阶变与含水层所受体应力之间的定量关系[J].地球物理学报,37(增刊I):222-229.
中国地震局监测预报司.2005.2004年印度尼西亚苏门答腊8.7级大地震及其对中国大陆地区的影响[M].北京:地震出版社.
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