https://earthquake.usgs.gov/earthquakes/feed/v1.0/csv.php
real-time data provided by USGS in spreadsheet format, most useful data in app.
date, latitude, longitude, depth, magnitude, place, type
For Developers API documentation
https://earthquake.usgs.gov/fdsnws/event/1/
Get geojson data from query and parameter
https://earthquake.usgs.gov/fdsnws/event/1/query?starttime=2017-04-29&endtime=2017-04-30&format=geojson
json pretty print
http://jsonprettyprint.com/
-time is unix timestamp
more than 4.5 magnitude
https://earthquake.usgs.gov/fdsnws/event/1/query?starttime=2017-04-29&endtime=2017-04-30&format=geojson&minmagnitude=4.5
