A community experiment to record the full seismic wavefield in Oklahoma


Observing the full seismic wavefield by deploying large numbers of seismometers (also known as large-N deployments) and analyzing the resultant large datasets is now more feasible than ever before as a result of advances in instrumentation, computational power, and data analysis techniques. In 2015, the Incorporated Research Institutions for Seismology (IRIS) proposed a field deployment to provide the research community with experience in new techniques for obtaining full wavefield observations using a range of instrumentation (threecomponent [3C] nodal-style sensors, broadbands, and infrasound) at multiple spatial and temporal scales. The goals of the experiment were to demonstrate the field use of the nodal sensors, contribute a compelling dataset that could be analyzed through innovative techniques, and evaluate the performance of new array designs and instruments (particularly the 3C nodes). The resulting IRIS Wavefields Demonstration Community Experiment, conducted in north-central Oklahoma during the summer of 2016, collected data that were immediately made open and available at the IRIS Data Management Center (network code YW) and provided a unique and scientifically rich dataset to advance our understanding of the full seismic wavefield. A key finding was that by burying the 3C nodal sensors used in the deployment, substantially lower horizontal noise levels were achieved across a wide range of periods spanning 0.01-100 s.

Publication Title

Seismological Research Letters