US earthquakes with a magnitude of 2.5 or greater, occurring in the
first half of 2019, from January 1 to June 30, from USGS.
The data is formatted for transforming with usmap_transform().
Once the longitude and latitude is transformed, it can be added to
plot_usmap() using ggplot2::ggplot() layers.
data(earthquakes)A data frame with 2254 rows and 3 variables.
lon The longitude of the earthquake's location.
lat The latitude of the earthquake's location.
mag The magnitude of the earthquake.