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首页> 外文期刊>Pure and Applied Geophysics >Tilt observations in the normal mode frequency band at the Geodynamic Observatory Cueva de los Verdes, Lanzarote
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Tilt observations in the normal mode frequency band at the Geodynamic Observatory Cueva de los Verdes, Lanzarote

机译：兰萨罗特岛地球动力学观测台Cueva de los Verdes在正常模式频段内的倾斜观测

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摘要

We have conducted observations with the aid of a seismo-tiltmeter station, which is based on the Ostrovsky pendulum and installed at the Geodynamic Observatory Cueva de los Verdes at Lanzarote Island since 1995. In this station the signal is separated into two frequency bands - tidal tilts (from 0 to 5 mHz) and ground oscillations in the frequency range of free Earth's normal modes (from 0.2 to 5 mHz). The later band, called accelerometer channel, has additional amplification. We analyzed the background records in the frequency range of Earth's free oscillations from August 2000 to September 2001, as well as, Earth's normal modes after strong earthquakes. We found several distinctive persistent peaks in the spectra of background oscillations. Both amplitudes of distinguished peaks and noises have seasonal variations. We found that spectra of background oscillations are different in the frequency interval between 1.4 and 2.5 mHz for North- South and East-West components.
机译：自1995年以来，我们借助基于Ostrovsky摆的地震倾斜仪站进行了观测，该站安装在兰萨罗特岛的Cueva de los Verdes地球动力学观测站。在该站中，信号分为两个频带-潮汐在自由地球正常模式的频率范围（0.2至5 mHz）内倾斜（0至5 mHz）和地面振荡。后面的频带称为加速度计通道，具有额外的放大。我们分析了2000年8月至2001年9月地球自由振荡的频率范围以及强地震后地球正常模式的背景记录。我们在背景振荡光谱中发现了几个独特的持久峰。明显的峰值幅度和噪声都具有季节性变化。我们发现，对于南北分量和东西分量，背景振荡的频谱在1.4到2.5 mHz的频率间隔中是不同的。

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