Ambient seismic noise eikonal tomography for near-surface imaging at Valhall

摘要

The ambient seismic field at Valhall contains omnidirectional noise suitable for seismic noise tomography at low frequen- cies between 0.35 Hz and 1.75 Hz. Scholte-waves traveling along the ocean floor can provide a tomographic image of features in the near surface (between 0 and 105 m beneath the ocean floor). This research shows there is potential for development of a very low-cost near-surface monitoring system using passive noise recorded by permanent ocean-bottom arrays.