The Effect of Near-Receiver Scattering on Seismograms,
Abstract
In the study of physical processes involved in the generation and propagation of seismic waves at near and regional distances, it is important to distinguish those features on the seismogram which contain primary information concerning the source and those features which are due to noise. In this study the data recorded from the Non-Proliferation Experiment (NPE) are used to study the possibility that signal generated noise caused by scattering of elastic waves near the receiver may contribute significantly to the recorded waveforms of the direct P wave. Two different examples of anomalous waveforms, the vertical component of free-field recordings and the transverse component of surface recordings are investigated. The results of this study indicate that elastic wave scattering near seismic receivers can have a significant effect upon recorded waveforms, with effects as large as 50% of the primary wave easily achieved. The scattering effect is complex, with strong directional, frequency, and near-field effects. A better understanding of these scattering effects could lead to improved methods of siting seismic receivers for the purposes of reducing the signal-generated noise on seismograms.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 14, 1995
- Accession Number
- ADP204454
Entities
People
- Lane R. Johnson
Organizations
- University of California, Berkeley