【摘 要】
：
2008年5月11日山西地区5个地壳形变测项出现了“前驱波”信号,但其真实的物理本质究竟如何?至今仍存质疑.为此,本文借助小波变换方法对气压波和“前驱波”在不同时、频段的相关性进行了较系统的诊断;还进一步将“前驱波”与短时气压波动所产生的干扰实例进行了对比分析.结果表明:这些“前驱波”并非源自汶川MS8.0地震,而主要是气压波动的干扰.
【机 构】
：
陕西地震台,西安 710068;福建地震台,福州 350003;中国科学院精密测量科学与技术创新研究院,武汉 430071;中国地质科学院地质研究所,自然资源部深地动力学重点实验室,北京 100037
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2008年5月11日山西地区5个地壳形变测项出现了“前驱波”信号,但其真实的物理本质究竟如何?至今仍存质疑.为此,本文借助小波变换方法对气压波和“前驱波”在不同时、频段的相关性进行了较系统的诊断;还进一步将“前驱波”与短时气压波动所产生的干扰实例进行了对比分析.结果表明:这些“前驱波”并非源自汶川MS8.0地震,而主要是气压波动的干扰.
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