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首页> 外文会议>International Symposium on Earthquake and Disaster Mitigation >The Preliminary Results: Seismic Ambient Noise Rayleigh Wave Tomography Around Merapi Volcano, Central Java, Indonesia
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The Preliminary Results: Seismic Ambient Noise Rayleigh Wave Tomography Around Merapi Volcano, Central Java, Indonesia

机译：初步结果：地震环境噪声瑞利波断层扫描周围Merapi火山，中爪哇省，印度尼西亚

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摘要

Ambient noise tomography is relatively a new method for imaging the shallow structure of the Earth subsurface. We presents the application of this method to produce a Rayleigh wave group velocity maps around the Merapi Volcano, Central Java. Rayleigh waves group velocity maps were reconstructed from the cross-correlation of ambient noise recorded by the DOMERAPI array which consists 43 broadband seismometers. In the processing stage, we first filtered the observation data to separatethe noise from the signal that dominated by the strong volcanic activities. Next, we cross-correlate the filtered data and stack to obtain the Green's function for all possible station pairs. Then we carefully picked the peak of each Green's function to estimate the dispersion trend and appliedMultiple Filter Technique to obtain the dispersion curve. Inter-station group velocity curvesare inverted to produceRayleigh wave group velocity maps for periods 1 to 10 s. The resulted Rayleigh group velocity maps show the interesting features around the Merapi Volcano which generally agree with the previous studies. Merapi-Lawu Anomaly (MLA) is emerged as a relatively low anomaly in our group velocity maps.
机译：环境噪声断层扫描是相对较新的成像地下地下浅结构的新方法。我们介绍了这种方法的应用，在Merapi火山，中爪哇省的瑞利波群速度图中产生。 Rayleigh波群速度图是从由多个Domerapi阵列记录的环境噪声的互相关来重建，由43个宽带震动仪组成。在处理阶段，我们首先将观察数据过滤到来自由强烈火山活动主导的信号的分离噪声。接下来，我们互连过滤的数据和堆栈以获得所有可能的站对的绿色功能。然后，我们精心挑选每一个绿色的估计分散的趋势，appliedMultiple滤波技术来获得色散曲线函数的峰值。站间群体速度Curvesare倒置为ProducerAyleigh波组速度映射，为期1到10秒。由此产生的Rayleigh组速度图显示了Merapi火山周围的有趣特征，通常与以前的研究一致。 Merapi-Lawu异常（MLA）在我们的小组速度图中被出现为相对低的异常。

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