rfsed 0.1.6

A python package for receiver functions analysis and dealing with sediment effects

rfsed is developed specifically to implement different techniques of analysing receiver functions from stations overlying sedimentary layers. The package is adaptable, efficient, and easy-to-use for different analysis receiver functions obtained from stations overlying sedimentary layers.

Receiver functions techniques implemented in rfsed are:

• H-k stacking of Zhu and Kanamori (2000)
• Sequential H-k stacking of Yeck et al., (2013)
• Resonance filtering and modified H-k stacking of Yu et al., (2015)
• H-k stacking and Waveform Fitting two-step method of Akinremi et al., (2024)
• Analysis of the synthetic reciever functions with the above-mentioned methods.

Beside these receiver function methods, rfsed has the following features:

• Creating publication quality figures for the results of the analysis.
• Extracting earthquake data from local seismic record files.
• Multiprocessing options for waveform fitting and extracting earthquake data from local seismic record files.

Receiver functions streams in the rfsed are handled by the 'RFStream' class of the rf open software, and it inherits a lot of useful methods from the Obspy class 'Stream'. It is supported via the obspyh5 package. For more information on class "RFStream", see documentation on rf. The rf framework is included in the rfsed package for completness under The MIT License (MIT) Copyright (c) 2013-2019 Tom Eulenfeld. In the rfsed modules to extract earthquake data from local seismic records, read and write support for necessary metadata is provided for SAC, SeismicHanlder and HDF5 formats based on ObsPy.

The receiver function forward calculation in rfsed is done using SynR, which is modified after the SynSeis module - seispy project (under the GNU GENERAL PUBLIC LICENSE).

Installation and testing of this package

Installation from PyPi

The easiest way to install rfsed is via pip_::

pip install rfsed

Installation from source code using environment.yml

To obtain the latest updates, you can install rfsed from the source code, available on GitHub.

# Clone the rfsed repository from GitHub
git clone https://github.com/akinremisa/rfsed.git

# Change directory to the same directory that this repo is in (i.e., same directory as setup.py and environment.yml)
cd rfsed  # That's the standard name the folder should have

# Create the conda environment, install dependencies, and install the rfsed package using environment.yml
conda env create -f environment.yml

# Activate the conda environment
conda activate rfsed

Test the rfsed package

You can test the package using pytest by running this command in the package directory and will look for all available tests in the current directory and subdirectories recursively

pytest

Or run individual tests in the /tests/ directory

Getting started

Access rfsed's documentation here.

rfsed comes with tutorials that demonstrates all its methods. You can find those in the examples/ directory.

Reporting Bugs / Contact the developers

This version is an early release of rfsed. If you encounter any issues or unexpected behaviour, please open an issue on GitHub.

Questions?

If you have any questions about the package, please use the discussions feature

Contributing

All contributions are welcome ... e.g. report bugs, discuss or add new features.

Citing rfsed

If you found this package useful, please consider citing it.

• Akinremi S., van der Meijde, M., Thomas, C., Afonso, J. C., Ruigrok, E., & Fadel, I. (2024). Waveform fitting of receiver functions for enhanced retrieval of crustal structure in the presence of sediments. Journal of Geophysical Research: Solid Earth (under review)

References

• Yeck, W. L., Sheehan, A. F., & Schulte-Pelkum, V. (2013). Sequential h-k stacking to obtain accurate crustal thicknesses beneath sedimentary basins. Bulletin of the Seismological Society of America, 103 , 2142-2150. doi: 10.1785/0120120290
• Yu, Y., Song, J., Liu, K. H., & Gao, S. S. (2015). Determining crustal structure beneath seismic stations overlying a low-velocity sedimentary layer using receiver functions. Journal of Geophysical Research: Solid Earth, 120 , 3208-3218. doi: 10.1002/2014JB011610
• Zhu, L., & Kanamori, H. (2000). Moho depth variation in southern California from teleseismic receiver functions. Journal of Geophysical Research: Solid Earth, 105, 2969-2980. doi: 10.1029/1999jb900322

Related receiver function projects

• rf including calculation of receiver functions
• seispy including hk-stacking
• RFPy including hk-stacking, harmonic decomposition
• BayHunter inversion of receiver functions and surface wave dispersion
• telewavesim synthetics
• PyGLImER including common conversion point imaging