陆态网淮北g-phone型连续重力仪观测高频扰动分析
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摘要
通过滤波分析方法,将淮北重力固体潮高频信号与气象实况资料的对比发现,高频异常信号与台风、寒流等强对流天气存在较好的应对关系,高频异常信号的优势周期为2min,频谱幅值、扰动振幅均为正常信号的4.5倍以上;主要受到西太平洋台风进入中国大陆或近海的影响,高频异常信号与台风中心速度正相关,与台风距离负相关;高频异常信号与中国大陆5级和观测点400公里内中等以上地震具有较好的对应,震前1～5天出现高频异常信号占比47.62%;高频异常信号与气压变化对应较弱。
By filtering analysis method, the huaibei tidal gravity high frequency signal and the actual meteorological data contrast found that abnormal high frequency signal with strong convective weather such as typhoon, cold snap is a better deal with relationship, the advantage of the abnormal high frequency signal cycle for 2 minutes, and the disturbance amplitude spectrum amplitude were 4.5 times more than normal signal; It is mainly affected by the typhoon entering the mainland of China or offshore areas in the western Pacific. High frequency abnormal signal has good correspondence with earthquakes of magnitude 5 in mainland China and above within 400 kilometers of the observation point.The high frequency abnormal signal has weak correspondence with the change of air pressure.
By filtering analysis method, the huaibei tidal gravity high frequency signal and the actual meteorological data contrast found that abnormal high frequency signal with strong convective weather such as typhoon, cold snap is a better deal with relationship, the advantage of the abnormal high frequency signal cycle for 2 minutes, and the disturbance amplitude spectrum amplitude were 4.5 times more than normal signal; It is mainly affected by the typhoon entering the mainland of China or offshore areas in the western Pacific. High frequency abnormal signal has good correspondence with earthquakes of magnitude 5 in mainland China and above within 400 kilometers of the observation point.The high frequency abnormal signal has weak correspondence with the change of air pressure.
引文
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[7]王梅,季爱东,曲同磊,等.泰安地震台重力扰动现象研究[J].地震学报,2014,36(3):443-451.
[8]淮北气象局[EB/OL].https://www.hb121.gov.cn/.
[9]中国天气台风网[EB/0L].https://typhoon.weather.com.cn/.
[2]赫晓光.L&R-PET重力仪在南极中山站记录到“不明地学事件”[J].极地研究,1997,9(3):214-215.
[3]刘子维,韦进,郝洪涛,等.日本Ms9.0地震前的重力高频扰动[J].大地测量与地球动力学,2010,31(2):4-8.
[4]韦进,刘子维,郝洪涛,等.日本Ms9.0地震前的连续重力观测异常[J].大地测量与地球动力学,2010,31(2):9-16.
[5]张雁滨,蒋骏,李胜乐,等.热带气旋引起的震颤波[J].地球物理学报,2010,53(2):335-341.
[6]李杰,卢双苓,殷海涛,等.泰安重力观测高频扰动信号分析[J].西北地震学报,2009,31(3):265-271.
[7]王梅,季爱东,曲同磊,等.泰安地震台重力扰动现象研究[J].地震学报,2014,36(3):443-451.
[8]淮北气象局[EB/OL].https://www.hb121.gov.cn/.
[9]中国天气台风网[EB/0L].https://typhoon.weather.com.cn/.