Teralytics recently looked at data from 500,000 smartphone users to determine how, when, and where Puerto Ricans moved between August 2017 and February 2018 during and following Hurricane Maria – generally considered to be the worst natural disaster on record for the area. 

CityLab published the data here and along with the following maps:

It shows the locations and the top 10 counties that received Puerto Rican population during the above time period. Florida and the Northeast are at the top of list, which isn’t all that surprising. Privacy concerns aside, it is once again an example of the kind of granular data that we now have access to. Prior to this data being available, all we apparently had was estimates.