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- The result shows that the extracted frequency components of the geomagnetic microtremor signals are clear, the baselines are straight and the wave patterns are complete. 结果表明，该算法提取的地磁脉动信号频率成分清晰、基线平整、波型完好。
- geomagnetic microtremor 地磁脉动
- The geomagnetic field varies continuously. 地磁场不断地发生变化。
- However, the composition of microtremor is still a debatable issue. 然而，微地动的组成成份仍旧是一个未解且有争论的议题。
- Relationship between the geomagnetic field and geodynamic. 中生代地球磁场变化特征的动力学含义.
- On advertisement: The day is geomagnetic, can you treat heart disease really? 广告上的：天地磁，真的能治疗心脏病？
- The last geomagnetic reversal for Earth was about 780,000 years ago. 地球上最后一次地磁倒转大约是78万年前。
- The form of the stable geomagnetic field is like that of a bar magnet at the center of the Earth. 稳定地磁场的形状与地球中心的棒磁铁的形状相似。
- The mechanism of the ground microtremor has been studied based on the analysis of theory and numerical modeling. 在理论分析和数值模拟的基础上，研究了各向异性介质的场地微动机制。
- The first is the creation of new magnetic fields from the ambient geomagnetic field. 第一个过程是在周围地磁场的基础上产生新磁场。
- The signals are auto-correlated and analyzed by FFT,and the characters of frequency response of site on microtremor signals are discussed. 选择福建沿海地区两种不同岩土工程地质条件的场地,通过实测地微动信号并进行相关分析、频谱分析,讨论了场地土对地微动的频率响应特征。
- Spatial Autocorrelation method (SPAC) is one of main methods used in microtremor exploration.It requires an regular circle array. 摘要空间自相关法是微动勘探的主要分析方法之一，它要求微动台阵为规则的圆形台阵，因此要在观测前进行定位。
- Microtremor measurement has been increasingly adopted to assess site amplification and S-wave velocity profile at sites. 微地动量测正逐渐地被应用在场址放大效应的评估，以及剪力波速剖面之推求上。
- At present, the study of theory and the engineering application on ground microtremor are based on the hypothesis of isotropy basically. 目前，场地微动的理论研究与工程应用基本上是基于各向同性(包括覆盖土层和基岩各向同性)的假设前提。
- ANALYSIS ON CHARACTERS OF GEOMAGNETIC SHORT-TERM ANOMALY BEFORE STRONG EARTHQUAKES IN NORTHWESTERN CHINA? 中国西北地区强震前地磁短期异常特征分析?
- Are geomagnetic disturbances a risk factor for the sudden unexplained death of epileptic children? 地磁干扰对患癫痫小孩突然无故死亡不是一个危险因素吗?
- Among other incidents, the geomagnetic storm caused a Japanese communications satellite to shut down temporarily. 在纭纭受影响的事件中,地磁暴使日本的一枚通讯卫星短暂停止运作。
- For instance the geomagnetic field, the heat flow, the propagation of seismic waves, the force of gravity, etc. 例如，应用地球物理勘探，可以了解诸如地磁场、热流、地震波的传播和重力等地球物理性质。
- The Microtremor Survey Method use Microtremor observation to distill surface wave, obtain it's dispersion curve and then get inversion to the underground structure. 微动勘探法是通过在野外设置一个观测台阵记录微动信号,然后从观测到的微动信号中提取面波,得到面波的频散曲线,最后用频散曲线反演地质结构。
- A strong and sustained southward IMF direction is a key factor in triggering geomagnetic storms. 强劲持久又指向南的IMF，是引发地球磁暴的关键因素。
