Which countries have the most volcanoes? I am currently learning the programming language Python, mainly to visualise data and draw maps. Since the examples in the tutorials were too boring for me, I have taken on more interesting questions.
An interesting dataset is the list of active volcanoes (i.e. at least 1 eruption in the Holocene) from https://volcano.si.edu/, which can be downloaded as an Excel spreadsheet.
As a choropleth map I wanted the number of volcanoes per country. It was then not so easy to combine the data set with other data sets (the shapefiles of the countries etc.)…
I was surprised that the USA is number one with 147 volcanoes. However, 26% of these are on the Aleutian Islands and 22% on the Alaska Peninsula … Indonesia follows in second place with 123 volcanoes, Russia in third place with 99 volcanoes, then come Japan and Chile.
Now that I have the dataset in shape, I can easily find answers to other questions I have never asked myself. Fun Fact: Tonga has the most volcanoes per square kilometre! No wonder it’s mostly small island states that show up here. Only one non-island state makes it into the top ten, and that is El Salvador.
|Country||Volcanoes per km2|
|2||Saint Kitts and Nevis||0.007663|
|5||Saint Vincent and the Grenadines||0.002571|