Abstract
Summary Field reconnaissance was performed during April 2022 to optimize the locations for an upcoming 3C and DAS-based active- and passive-seismic surveys for deep targeting mineral deposits in central Sweden. We acquired a firsthand passive seismic dataset for this purpose to investigate the noise characteristics in the study area. The field is a hard rock (crystalline setting) environment and is covered by forests. Within a radius of 1.5 km to the center of the passive array, considerable motorway and railway traffic is present. Lakes, creeks, settlements, and towns are also present within 8 km of radius, which can be also considered as potential noise sources. We collected 16 hours of passive data starting at 16:00 first day and finishing at 08:00 the next day using 12-3C 5 Hz sensors. The preliminary investigation of the noise suggests both industrial and traffic-originated noise sources, which are present around 5–60 Hz. Previous studies showed that these noise sources can be efficiently used for the body-and surface-wave retrieval and for the characterization of the subsurface. We conclude that the noise characteristics of the region are promising for passive imaging and an up-scaled work is recommended by employing more receivers and other sensing technologies.
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