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tremor_lags

This code repository accompanies Terleth et al. (2024), available at https://doi.org/10.1017/jog.2024.38.

Code repository for the compution of lag times between coherent glacio-hydraulic tremor series acquired through a network of independent seismic stations. Utilizes the matlab wavelet coherence tools (https://www.mathworks.com/help/wavelet/ug/compare-time-frequency-content-in-signals-with-wavelet-coherence.html). These scripts are meant to take the glaciohydraulic tremor timeseries produced with med_spec (https://github.com/tbartholomaus/med_spec).

The main script is wrapper_adjacent_stations.m, which calls the other functions. Here there are number of user specificied parameters, explained further in the script. Three functions are called:

  • data_load_adjacent_stations: data loading function that simply pulls the infromation from the .mat file.
  • get_lags_adjacent_stations: this function runs through the station pairs and computes the lags for them using wcoherence.
  • retrieve_specific_lags_adjacent_stations: this function takes the lag arrays and computes the median lag for a certain periodicity.

Finally, there is also com_wavelet_coherence.m, which is legacy and is left up because it shows the process of calcutlating lags quite well, and plot_lags_for_supplement.m, which was used to produce detailed lag plots.

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