本文選題：地電脈動(dòng)　切入點(diǎn)：頻率　出處：《地震學(xué)報(bào)》2017年04期 　論文類型：期刊論文

【摘要】：基于我國(guó)青藏高原東北緣地區(qū)的5個(gè)地電場(chǎng)觀測(cè)臺(tái)站2015年以來(lái)的長(zhǎng)時(shí)段地電場(chǎng)數(shù)據(jù),首先使用求取兩信號(hào)互相關(guān)函數(shù)的方法壓制了大部分不相關(guān)電磁擾動(dòng),然后通過(guò)高通濾波和信號(hào)的頻譜、自功率譜和互功率譜分析,得到了互相關(guān)分析后各臺(tái)站的時(shí)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(dòng)信號(hào).同時(shí)通過(guò)對(duì)大武臺(tái)原始數(shù)據(jù)進(jìn)行小波變換分析,并將同時(shí)段地電場(chǎng)觀測(cè)與相關(guān)頻段的地磁場(chǎng)觀測(cè)進(jìn)行對(duì)比,結(jié)果表明,地球電場(chǎng)在該頻段內(nèi)表現(xiàn)出Pc3—5的特點(diǎn),地電脈動(dòng)成分占優(yōu)勢(shì),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(guān).
[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(guó)地震局蘭州地震研究所;蘭州地球物理國(guó)家野外科學(xué)觀測(cè)研究站;廣東省地震局;
【基金】：中國(guó)地震局國(guó)家局專項(xiàng)(ZX2017040);中國(guó)地震局地震科技星火計(jì)劃(XH16037)聯(lián)合資助 國(guó)家自然科學(xué)基金(41374080)
【分類號(hào)】：P315.722
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本文編號(hào)：1649176