On the use of a seismic sensor as a seismic source

摘要

We investigate the use of seismic sensors as small seismic sources. A voltage signal is applied to a geophone that forces the mass within the geophone to move. The movement of the mass generates a seismic wavefield that is recorded with an array of geophones operating in the conventional sense. We observe higher-frequency (25 Hz and above) surface and body waves propagating from the geophone source at offsets of 10s of meters. We further demonstrate the use of a more powerful geophone-like source allowing seismic waves to be observed at longer offsets. Potential developments and future applications are discussed, including the integration of small sources into an acquisition system, near-surface characterization using small sources, and the determination of receiver locations through inversion of small source recordings.