Great Sitkin FWANT paper (GRL) in 2023

This repository contains the imaging parameters and the resultant velocity model for the Great Sitkin full-wave ambient noise tomograhy (FWANT) paper. Yang, X., Roman, D. C., Haney, M., & Kupres, C. A. (2023). Double Reservoirs Imaged Below Great Sitkin Volcano, Alaska, Explain the Migration of Volcanic Seismicity. Geophysical Research Letters, 50(11). https://doi.org/10.1029/2022GL102438

Contact Xiaotao Yang (xtyang AT purdue DOT edu) for questions regarding this repository.

Directories:

• EGFscripts

Scripts used to download the continous waveforms and extract the empirical Green's functions. The scripts use the SeisGo package [https://github.com/xtyangpsp/SeisGo] for processing the seismic waveforms. See the instructions there for installing and using SeisGo.

• stations_events

Informaiton of seismic stations and earthquakes used in the paper.

• vmodel

The velocity model from the full-wave ambient noise tomography. The MATLAB script/function to read the netCDF model is also provided. The format of the model file follows the standard/convention by IRIS EMC.

• outlines

Outline data used in plotting, including coastline for the Great Sitkin island and the outlien of the resolvable area (station coverage) used in masking the velocity model.

• melt

This folder contains codes and the jupyter notebook used to estimate melt fractions, based on Paulatto et al. (2022).

References

• The Great Sitkin FWANT paper Yang, X., Roman, D. C., Haney, M., & Kupres, C. A. (2023). Double Reservoirs Imaged Below Great Sitkin Volcano, Alaska, Explain the Migration of Volcanic Seismicity. Geophysical Research Letters, 50(11). https://doi.org/10.1029/2022GL102438

• Full-wave ambient noise tomograhy method Gao, H., & Shen, Y. (2014). Upper mantle structure of the Cascades from full-wave ambient noise tomography: Evidence for 3D mantle upwelling in the back-arc. Earth and Planetary Science Letters, 390, 222–233. https://doi.org/10.1016/j.epsl.2014.01.012

Yang, X., & Gao, H. (2020). Segmentation of the Aleutian‐Alaska Subduction Zone Revealed by Full‐Wave Ambient Noise Tomography: Implications for the Along‐Strike Variation of Volcanism. Journal of Geophysical Research: Solid Earth, 125(11), 1–20. https://doi.org/10.1029/2020JB019677

• SeisGo package Yang, X., Zuffoletti, I. D., D’Souza, N. J., & Denolle, M. A. (2022, 1). SeisGo: A ready-to-go Python toolbox for seismic data analysis [Computer Software]. Zenodo. Retrieved from https://doi.org/10.5281/zenodo.5873724 doi: 10.5281/zenodo.5873724

• Melt fraction calculation Paulatto, M., Hooft, E. E. E., Chrapkiewicz, K., Heath, B., Toomey, D. R., & Morgan, J. v. (2022). Advances in seismic imaging of magma and crystal mush. Frontiers in Earth Science, 10, 2005. https://doi.org/10.3389/feart.2022.970131