Optimize the Stacking of Noise Correlation Functions
Session: Advances in Seismic Interferometry: Theory, Computation and Applications [Poster]
Type: Poster
Date: 4/22/2021
Presentation Time: 11:30 AM Pacific
Description:
The cross-correlation of ambient seismic noise provides propagation information of seismic waves in the three dimensional Earth. A common step in extracting Noise Correlation Functions (NCFs) is the stacking of individual correlations performed at short time windows, e.g. a day or an hour, over a longer period. However, one important characteristic of resultant NCFs is the variation of the overall quality through time, which is commonly ignored in the final stacking. This temporal variation may be the consequence of either the seasonal change of microseisms, the contamination from local transient signals, or the influence of instrumental performance. These factors lead to noisy or useless individual NCFs, which would consequently contaminate the final stack. In this study, we explore seven different temporal stacking methods and evaluate their performance, in terms of signal-to-noise ratios, the preservation of relative amplitudes, and computational expenses, to optimize the final stack of NCFs.
Presenting Author: Xiaotao Yang
Student Presenter: No
Authors
Xiaotao Yang Presenting Author Corresponding Author xtyang@purdue.edu Purdue University |
Jared Bryan jtbryan@mit.edu Massachusetts Institute of Technology |
Kurama Okubo kokubo@bosai.go.jp National Research Institute for Earth Science and Disaster Resilience |
Chengxin Jiang chengxin.jiang1@anu.edu.au Australian National University |
Tim Clements thclements@g.harvard.edu Harvard University |
Marine Denolle mdenolle@uw.edu University of Washington |
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Optimize the Stacking of Noise Correlation Functions
Category
Advances in Seismic Interferometry: Theory, Computation and Applications