本文選題：地電脈動　切入點：頻率　出處：《地震學報》2017年04期 　論文類型：期刊論文

【摘要】：基于我國青藏高原東北緣地區(qū)的5個地電場觀測臺站2015年以來的長時段地電場數(shù)據(jù),首先使用求取兩信號互相關函數(shù)的方法壓制了大部分不相關電磁擾動,然后通過高通濾波和信號的頻譜、自功率譜和互功率譜分析,得到了互相關分析后各臺站的時頻變化情況,結(jié)果顯示在1Hz采樣數(shù)據(jù)中10~(-3)—10~(-1)Hz部分可能含有地電脈動信號.同時通過對大武臺原始數(shù)據(jù)進行小波變換分析,并將同時段地電場觀測與相關頻段的地磁場觀測進行對比,結(jié)果表明,地球電場在該頻段內(nèi)表現(xiàn)出Pc3—5的特點,地電脈動成分占優(yōu)勢,且10~(-3)—10~(-1)Hz頻段的能量較高,這一現(xiàn)象可能與地球磁層和電離層輻射波的穩(wěn)定性有關.
[Abstract]:A long time in the northeastern margin of the Tibetan Plateau of China 5 geoelectric field observation stations since 2015 based on the field data, the first use of two methods to calculate the correlation function of the signal suppression of many related electromagnetic disturbance, and then through high pass filtering and spectrum signal, the power spectrum and cross power spectrum analysis, time-frequency the changes of each station are correlation analysis, the results showed that in 1Hz sampling data in 10~ (-3) - 10~ (-1) Hz may contain geoelectric pulse signals. At the same time, the wavelet transform analysis is carried out through the large Taiwan original data, and at the same time electric field observation and related frequency of geomagnetic observation comparison results show that the earth's electric field shows the characteristics of Pc3 - 5 in the frequency range, geoelectric ripple component is dominant, and the 10~ (-3) - 10~ (-1) Hz band high energy, this phenomenon may be related to the earth magnetosphere and ionosphere radiation The stability of the wave is related.

【作者單位】： 中國地震局蘭州地震研究所;蘭州地球物理國家野外科學觀測研究站;廣東省地震局;
【基金】：中國地震局國家局專項(ZX2017040);中國地震局地震科技星火計劃(XH16037)聯(lián)合資助 國家自然科學基金(41374080)
【分類號】：P315.722
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本文編號：1649176