T62 New Advances in Using Near-Surface Geophysics to Solve Geological Problems

Sunday, 22 September 2019
1:30 PM - 5:30 PM
Room 224B, North Building

DENSE RAPIDLY DEPLOYABLE SEISMIC ARRAYS FOR APPLICATIONS FROM LITHOSPHERIC STRUCTURE TO LOCAL SURFACE PROCESSES

Paper number: T62-5
Program: Technical Sessions
Time: 2:30 PM – 2:45 PM

Authors

Abstract

Among the portable instruments used by natural source seismologists, cable-free seismographs containing geophones have seen rapidly expanded use in recent years for collecting continuous seismic data. Such rapidly deployable autonomous recording units are often referred to as ‘nodes’. They facilitate the deployment of large numbers of sensors to form ‘Large-N’ arrays suited to more holistic investigation of wave-fields rather than seismic motions at isolated sites. Some of the strengths and limitations nodal arrays will be illustrated through examples from ongoing collaborative research focused on tectonic, magmatic, and geomorphic processes operating across a wide range of scales. For crustal and lithospheric scale studies rapidly deployable and low impact nodal arrays can efficiently provide a higher frequency view of heterogeneous structures such as active plate boundary interfaces and abrupt compositional variations. At finer scales of hundreds of meters nodal arrays can identify spatial and temporal variations in mechanical surface processes such as sediment transport in rivers and groundwater transport. Across the range of scales considered, nodal arrays open up increasing opportunities for synergy between natural and controlled source seismology projects.

Geological Society of America Abstracts with Programs. Vol. 51, No. 5

doi: 10.1130/abs/2019AM-340469

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