A hastely-made implementation of GlobalCMT catalog on QGIS for your convenience.
All data is based on GlobalCMT https://www.globalcmt.org/ .
Obspy https://docs.obspy.org/ is used for extracting GlobalCMT data.
In this implementation, earthquakes larger than M4 between the period of 1991-2020 (30 years) are included.
Now it covers all events in GlobalCMT catalog as of Dec. 2022.
Note: The following steps show how-to in QGIS 3.28.1.
- Download
. This file contains the table (id, latitude, longitude, magnitude, depth, image file name).
- Download
. Note that these images consume 28 GB of your disk space when they get extracted!!!.
- Download
. This file allows to do the basic setup for the gpkg layer.
- Extract the ZIP file. You will find 57k SVG images in CMTimages folder. Remember where you place them.
- Open GlobalCMT-All.gpkg on QGIS. Proceed layer properties -> Style -> Import style. Choose globalcmt-style-M7-30km.qml which was downloaded earlier and apply it to the gpkg layer.
- Next, choose Symbology and click the marker. The marker setting window will pop up. Scroll to the bottom.
- Find textbox to choose the path to SVG files. Click "ε" and choose edit to open a textbox.
- In the textbox, you will find the text in place. You need to change it accodringly to the path to the SVG files which you extracted from the ZIP file.
- Click OK to close the all pop-ups. You will see several beachballs around the world. By default, only the events with Depth<30 km and Mag>7 are shown. You may change it through modifying the filter in Layer properties -> Symbology -> Value.
These datasets are provided for conveniently view regional-scale trend in CMT solutions. Uncertainty, differences in magnitude types, etc. are not considered in this implementation.
Fumihiko Ikegami (Twitter:@geoign) of Ikegami Georesearch.