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Abstract

Analyses of seismic data demonstrate increasing acoustic energy recorded above an<br>underground tunnel. This is attributed to internal reverberations within the tunnel,<br>reflection (backscattering), and wave conversion. Soil heterogeneity, changes in<br>geophone-to-ground coupling and the shape of the generated signal introduce fluctuations<br>into the trace spectrum.

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/content/papers/10.3997/2214-4609-pdb.157.sageep047
2009-03-29
2021-01-19
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.157.sageep047
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