台风引起的重力扰动现象
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摘要
山东省泰安台LaCoste-PET型重力仪安装以来,出现了几次固体潮"脉动加粗"的情况.用高通滤波进行信息分离后发现,"脉动加粗"与2008年登陆我国最强的3次台风发生时间有很好的对应.烟台SSQ-2型倾斜仪表现出与重力仪同步"脉动加粗"的特征,泰安台JCZ-1型地震仪在台风发生期间也观测到了"纺锤形"振幅加大的情况,台风信号卓越周期为3—7s.分析结果表明,重力仪及倾斜仪的这些异常变化均是台风引起的扰动,"扰动"信号的频率、幅度在重力仪的监测能力内."扰动"的出现与台风发展强度、移动速度及地理位置有关.
The LaCoste-PET gravity-meter installed at Tai'an station recorded micro-tremor several times,manifesting as abnormally thickened recording traces.After processed with high-pass filter,the records indicate that these tremors correspond well to three strong typhoons landed on Chinese mainland.The tilt-meter at Yantai station also recorded the same tremors and showed thickened recording traces synchronously with the Tai'an gravity records.The JCZ-1 ultra broadband seismometer,installed at Tai'an station,also recorded spindle-like amplitude variation during the time of these typhoons.Predominant period of the seismic signals of typhoon is 3--7 s.The analyzed result of this study indicates that the gravity and tilt tremors come from anomalous distur-bances caused by typhoons.The frequencies and amplitudes of the disturbance remain in the measurement range of gravity-meter.Appearance of the disturbance is related to the growth strength,moving speed and location of the typhoons.
The LaCoste-PET gravity-meter installed at Tai'an station recorded micro-tremor several times,manifesting as abnormally thickened recording traces.After processed with high-pass filter,the records indicate that these tremors correspond well to three strong typhoons landed on Chinese mainland.The tilt-meter at Yantai station also recorded the same tremors and showed thickened recording traces synchronously with the Tai'an gravity records.The JCZ-1 ultra broadband seismometer,installed at Tai'an station,also recorded spindle-like amplitude variation during the time of these typhoons.Predominant period of the seismic signals of typhoon is 3--7 s.The analyzed result of this study indicates that the gravity and tilt tremors come from anomalous distur-bances caused by typhoons.The frequencies and amplitudes of the disturbance remain in the measurement range of gravity-meter.Appearance of the disturbance is related to the growth strength,moving speed and location of the typhoons.
引文
郝晓光,胡小刚,许厚泽,钟敏,方剑,郝兴华,刘明,刘根友,薛怀平.2008.汶川大地震前的重力扰动[J].大地测量与地球动力学,28(3):129--131.
金星,康兰池.2007.利用宽频带速度记录的频域特征研究台风[J].自然灾害学报,16(4):27--35.
秦飞,郑菲,李均之.2007.临震次声异常产生的机理研究[J].北京工业大学学报,33(1):106--112.
邵中明,李峰.1999.JCZ-1甚宽频带数字地震仪地震记录特征[J].地壳形变与地震,19(1):87--94.
王梅,牛安福,刘希强,李峰.2006.日本7级以上双震前泰安台伸缩仪固体潮畸变[J].大地测量与地球动力学,26(4):69--75.
王武星,马丽,黄建平.2007.强地震前后重力观测中异常变化现象的研究[J].地震,27(2):53--60.
吴忠良.2001.地震学中的“暗物质”:“静地震”与地震预测研究的未来[J].国际地震动态,(9):1--5.
吴忠良.2004.寂静地震与地震预测的物理问题[J].物理,33(11):796--800.
夏雅琴,胡争杰,郑菲.2005.震前次声波信号特征研究[J].北京工业大学学报,31(5):461--465.
张淑亮,李媛媛,李冬梅,范雪芳,赵晓云.2006.井-含水层系统对前驱波响应能力的分析[J].地震学报,28(3):261--268.
张晁军,石耀霖,马丽.2005.慢地震研究中的一些问题[J].中科院研究生院学报,22(3):258--269.
浙江水利.2008.台风路径实时发布系统[EB/OL].[2008-11-30].http:∥www.zj water.gov.cn
中国气象局网.2008.台风实时路径显示系统[EB/OL].[2008-11-30].http:∥www.nmc.gov.cn/typh.new.php
金星,康兰池.2007.利用宽频带速度记录的频域特征研究台风[J].自然灾害学报,16(4):27--35.
秦飞,郑菲,李均之.2007.临震次声异常产生的机理研究[J].北京工业大学学报,33(1):106--112.
邵中明,李峰.1999.JCZ-1甚宽频带数字地震仪地震记录特征[J].地壳形变与地震,19(1):87--94.
王梅,牛安福,刘希强,李峰.2006.日本7级以上双震前泰安台伸缩仪固体潮畸变[J].大地测量与地球动力学,26(4):69--75.
王武星,马丽,黄建平.2007.强地震前后重力观测中异常变化现象的研究[J].地震,27(2):53--60.
吴忠良.2001.地震学中的“暗物质”:“静地震”与地震预测研究的未来[J].国际地震动态,(9):1--5.
吴忠良.2004.寂静地震与地震预测的物理问题[J].物理,33(11):796--800.
夏雅琴,胡争杰,郑菲.2005.震前次声波信号特征研究[J].北京工业大学学报,31(5):461--465.
张淑亮,李媛媛,李冬梅,范雪芳,赵晓云.2006.井-含水层系统对前驱波响应能力的分析[J].地震学报,28(3):261--268.
张晁军,石耀霖,马丽.2005.慢地震研究中的一些问题[J].中科院研究生院学报,22(3):258--269.
浙江水利.2008.台风路径实时发布系统[EB/OL].[2008-11-30].http:∥www.zj water.gov.cn
中国气象局网.2008.台风实时路径显示系统[EB/OL].[2008-11-30].http:∥www.nmc.gov.cn/typh.new.php
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