WIP: Tutorial 4 - Geophysics (Seismology): Add JN

[yvonnefroehlich]

This PR adds the Jupyter notebook for Tutorial 4 - Geophysics (Seismology).

• Study region: Chilean subduction zone since there are significant topographic variation, earthquakes, and volcanoes
• Orientation: https://www.pygmt.org/dev/gallery/images/cross_section.html
• Prepare gridded data: pygmt.xyz2grd
• Create a contour map: pygmt.Figure.grdcontour
• Create a profile plot: pygmt.project and pygmt.grdtrack
• Additional features: seismicity, beachball, plate motion

Feel free to fill the subsections with suggestions for code and docs🙂.

Preview:

• https://github.com/GenericMappingTools/agu24workshop/blob/add-jn-geo-seis/book/tut4_geophysics.ipynb
• https://gitnotebooks.com/GenericMappingTools/agu24workshop/pull/8

Fixes: #6

[jhtong33]

Hi @yvonnefroehlich
do we use grdproject or project ?
Since grdproject is specified for a region rather than individual point-to-point.

see also: https://www.pygmt.org/v0.13.0/gallery/images/cross_section.html#sphx-glr-gallery-images-cross-section-py

[yvonnefroehlich]

Hi @yvonnefroehlich do we use grdproject or project ? Since grdproject is specified for a region rather than individual point-to-point.

see also: https://www.pygmt.org/v0.13.0/gallery/images/cross_section.html#sphx-glr-gallery-images-cross-section-py

Yep, I am sorry, I mean project I mistyped this 🙁.

[yvonnefroehlich]

Thanks a lot, @jhtong33 , for getting started here 👍!

I made a few updates:

• I prefer to use the Scientific colour maps by F. Crameri, i.e., for topography, "oleron".
• I reduced the resolution of the image showing within the Jupyter notebook to keep the file size smaller.
• I figured out that list input is supported for the center and endpoint parameters of project.
• Fix typo grdproject to project.
• So minor code style improvements.
• I think we should be consistent and use either single (') or double (") quotation marks; I prefer double quotation marks.

[jhtong33]

Thanks a lot, @jhtong33 , for getting started here 👍!

I made a few updates:

• I prefer to use the Scientific colour maps by F. Crameri, i.e., for topography, "oleron".
• I reduced the resolution of the image showing within the Jupyter notebook to keep the file size smaller.
• I figured out that list input is supported for the center and endpoint parameters of project.
• Fix typo grdproject to project.
• So minor code style improvements.
• I think we should be consistent and use either single (') or double (") quotation marks; I prefer double quotation marks.

Great! Thanks for your updates.
I used a remote dataset to convert data into a .txt file, which I then provided as input materials for pygmt.xyz2grd.

[jhtong33]

Hi @yvonnefroehlich
I have one idea that plotting beachballs for magnitude >6 events to make the tutorial more comprehensive.
However, If time make it challenging to cover all details within a 45-minute session, it would be great to focus on one significant event as an example.

see also: https://www.isc.ac.uk/cgi-bin/web-db-run?request=COMPREHENSIVE&out_format=CATCSV&searchshape=RECT&bot_lat=-40&top_lat=0&left_lon=-90&right_lon=-60&ctr_lat=&ctr_lon=&radius=&max_dist_units=deg&srn=&grn=&start_year=2022&start_month=1&start_day=01&start_time=00%3A00%3A00&end_year=2023&end_month=1&end_day=01&end_time=00%3A00%3A00&min_dep=&max_dep=&min_mag=6&max_mag=&req_mag_type=MW&req_mag_agcy=&include_links=on

[yvonnefroehlich]

Hi @yvonnefroehlich I have one idea that plotting beachballs for magnitude >6 events to make the tutorial more comprehensive. However, If time make it challenging to cover all details within a 45-minute session, it would be great to focus on one significant event as an example.

see also: https://www.isc.ac.uk/cgi-bin/web-db-run?request=COMPREHENSIVE&out_format=CATCSV&searchshape=RECT&bot_lat=-40&top_lat=0&left_lon=-90&right_lon=-60&ctr_lat=&ctr_lon=&radius=&max_dist_units=deg&srn=&grn=&start_year=2022&start_month=1&start_day=01&start_time=00%3A00%3A00&end_year=2023&end_month=1&end_day=01&end_time=00%3A00%3A00&min_dep=&max_dep=&min_mag=6&max_mag=&req_mag_type=MW&req_mag_agcy=&include_links=on

Regarding plotting the seismicity as color- and size-coded circles: Actually, is more or less the same as I do already in part "1.3 Create a geographical map of the earthquakes" of tutorial 2 (please see https://github.com/GenericMappingTools/agu24workshop/blob/add-jn-pd-gpd/book/tut2_spec_pd_gpd.ipynb). Reading data in to a pandas.Dataframe and plotting it with color- and size-coding. Maybe we just provide the data and they should try to write the code on their own as an additional task?

Some updates from my side

• Code for plotting one single earthquake as beachball
• More documentation
• Links to the PyGMT documentation for the used functions and methods
• Usage of SC by F. Crameri
• Reduced resolution for all images shown within the JN to keep the file small

[jhtong33]

Regarding plotting the seismicity as color- and size-coded circles: Actually, is more or less the same as I do already in part "1.3 Create a geographical map of the earthquakes" of tutorial 2 (please see https://github.com/GenericMappingTools/agu24workshop/blob/add-jn-pd-gpd/book/tut2_spec_pd_gpd.ipynb). Reading data in to a pandas.Dataframe and plotting it with color- and size-coding. Maybe we just provide the data and they should try to write the code on their own as an additional task?

Oh! Great! I agree that they can write the code on their own. Perhaps we can write more details or provide the example figure with them. How do you think ?