Replicating NatGeo’s “Proper” Earthquake Map in R

I saw this post over at NatGeo over the weekend and felt compelled to replicate this: with ggplot2. Three shapefiles later and we have it close enough to toss into a post (and I really don’t believe the continent names are necessary). library(rgdal) library(ggplot2) library(ggthemes)   # grab these from   world <- readOGR("countries.geo.json", […]