2. Unique Acquisition and Processing Problems

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Abstract
For SH-wave recording, measures taken to suppress noise in the field usually are determined by examining characteristics of the Love waves. The relatively noise-free time window between first arrivals and surface waves, which is often used for compressional p-wave recording with surface sources, does not exist for shear-wave recording. By displaying surface-wave and reflection wavelengths from the record versus slope of the event (inverse apparent velocity) on the record, we determine which wavelengths should be suppressed by irreversible wavelength filtering (source and receiver arrays) in the field and which events should be suppressed by later velocity filtering. The effect of conventional wavelength filtering and combined wavelength and velocity filtering is illustrated in an example which shows the improvement achieved in SH-wave reflection quality.

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