USAP-DC

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Collaborative Research: Monitoring Antarctic Ice Sheet Changes with Ambient Seismic Noise Methods Start Date: 2017-05-01 End Date: 2019-04-30 Program: POLENET Description/Abstract In this project, the researchers processed and analyzed previously acquired seismic data from the POLENET-ANET array (2010-2011) to estimate variations in seismic shear-wave speed beneath the array. This investigation used a passive seismology method call ambient noise tomography, whereby repetitive seismic noise correlation functions were computed from records of Earth's ambient seismic noise field. The main results indicate a shallower Moho beneath Marie Byrd Land compared to previous studies in the region. Personnel Person Role Mordret, Aurelien Co-Investigator Mikesell, Dylan Investigator and contact Funding Antarctic Earth Sciences Award # 1643795 AMD - DIF Record(s) USAP-1643795_1 Data Management Plan None in the Database Product Level: 0 (raw data) Datasets Repository Title (link) Format(s) Status USAP-DC 2D shear-wave velocity model across the West Antarctic Rift System from POLENET-ANET seismic data None exists Publications Xu, Z., Mikesell, T. D., Umlauft, J., & Gribler, G. (2020). Rayleigh-wave multicomponent crosscorrelation-based source strength distribution inversions. Part 2: a workflow for field seismic data. Geophysical Journal International, 222(3), 2084–2101. (doi:10.1093/gji/ggaa284) Xu, Z., & Mikesell, T. D. (2022). Estimation of Resolution and Covariance of Ambient Seismic Source Distributions: Full Waveform Inversion and Matched Field Processing. Journal of Geophysical Research: Solid Earth, 127(6). Portico. (doi:10.1029/2022jb024374) Keywords SEISMIC SURFACE WAVES West Antarctica Platforms and Instruments FIELD INVESTIGATION