How to make a map!

import numpy as np
import pandas as pd
%matplotlib inline
import matplotlib.pyplot as plt
pd.options.display.max_columns = 25
#To use cartopy in a Colab notebook, I need a particular sequence of installs (as shown at this notebook: https://colab.research.google.com/github/adamlamee/CODINGinK12/blob/master/notebooks/quakes.ipynb#scrollTo=3LkZkXvnMAr4)
!apt-get -qq install python-cartopy python3-cartopy;
!pip uninstall -y shapely;
!pip install shapely --no-binary shapely;
import cartopy.crs as ccrs
import cartopy.feature as cfeature
from cartopy.mpl.ticker import LongitudeFormatter, LatitudeFormatter

fig, ax = plt.subplots(figsize=(12,7))
ax = plt.axes(projection=ccrs.PlateCarree())
ax.coastlines(resolution='10m')
ax.set_extent([-72.75, -69.75, 40.5, 42.25])