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首页> 外文期刊>Seismological research letters >A regional seismic array of three-component stations in Central Saudi Arabia
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A regional seismic array of three-component stations in Central Saudi Arabia

机译：沙特阿拉伯中部三分量站的区域地震阵列

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摘要

Based on the background noise level observed at the center element of the Ar Rayn seismic array, coherence analysis, and beam-forming results for representative events in the region, this array of data should prove very valuable for examining seismicity and structure in the Arabian peninsula. Noise levels approach the Peterson low noise model (1993) between 0.05 Hz and 2 Hz and are low in the 2-10 Hz band. Noise levels are elevated on the horizontal elements below 0.05 Hz, which may limit measurements of surface wave dispersion and moment tensor inversions but should not affect high-frequency beamforming capabilities. Initial beamforming results demonstrate that the array will improve estimates of P arrival times and waveforms for small events in the region. Since the array is one of only a few with three-component stations deployed at all elements, it should provide opportunities to examine more sophisticated combinations of beamforming and polarization filtering and phase identification and association through three-component FK analysis. Initial results for two events, one at local distance and a second at regional distance, confirm this expectation.
机译：根据在Ar Rayn地震阵列中心元素处观测到的背景噪声水平，相干分析和该地区代表性事件的波束形成结果，该数据阵列对于检验阿拉伯半岛的地震活动和结构具有十分重要的价值。 。噪声水平在0.05 Hz和2 Hz之间接近Peterson低噪声模型（1993），并且在2-10 Hz频带中较低。水平元件上的噪声水平会升高到0.05 Hz以下，这可能会限制表面波色散和矩张量反转的测量，但不会影响高频波束成形能力。最初的波束成形结果表明，该阵列将改善该区域中小事件的P到达时间和波形的估计。由于该阵列是在所有元素上均部署有三分量站的少数几个阵列之一，因此它应提供机会通过三分量FK分析来检查波束形成和偏振滤波以及相位识别和关联的更复杂的组合。两项事件的初步结果证实了这一期望，一次事件在局部距离，第二次在区域距离。

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