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估计实验室地震源参数:从校准声学系统的光谱反转

Federico Pignalberi¹, Giacomo Mastella¹, Carolina Giorgetti¹

¹Dipartimento di Scienze della Terra, La Sapienza Università di Roma, 00185 Rome, Italy.

Sensors (Basel, Switzerland)

|September 14, 2024

概括

实验室声学排放 (AEs) 提供地震洞察力. 这项研究对AE系统进行校准,使得在断层挖掘实验中对地震源进行准确的分析,并揭示了类似地震的缩放关系.

科学领域:

地震学和地质物理学
对地震过程的实验室研究.

背景情况:

实验室声学排放 (AE) 是研究地震力学的关键类型.
准确的AEs物理解释需要对声学系统进行严格的校准.
现有的方法可能无法完全考虑传感器,仪器和路径效应.

研究的目的:

开发和验证实验室声辐射系统的实证校准技术.
量化传感器响应,仪器仪表和波传播的综合影响.
为了获得校准的声辐射源光谱,以改善物理解释.

主要方法:

开发了一种"仪器设备响应"来描述频率领域的系统效应.
使用受控的地震源 (钢球) 和模拟地震站的压电传感器 (PZT).
在双重直接剪切实验中,将校准应用于石英的声学排放.

主要成果:

成功地从原始AE光谱中检索并删除仪表仪表的响应.
获得了校准的AE源光谱,限制了地震AE源参数.
从棒滑石英实验中校准的AE显示了与地震缩放一致的等级 (-7.1至 -6.4) 和应力下降 (0.0754.29MPa).

结论:

校准方法增强了对实验室声辐射源的物理洞察力.
来自摩擦实验的实验室AE与自然地震有很强的相似之处.
这项工作有助于人们更好地了解断层实验中的地震破裂过程.

关键词:

声学排放的声音排放.声学传感器校准声学传感器校准实验室的地震实验室的地震源参数的参数来源参数

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