"This Ultimate Map Shows Where People Are Moving Inside The United States"
"This map shows the net domestic migration for each county in the U.S. for the year between July 1, 2012, and July 1, 2013, adjusted by the original 2012 population. Counties with positive net domestic migration (more people moving in than moving out) are in blue and counties with negative net migration are in red . . .
"The most startling aspect is the mass of dark blue in western North Dakota and eastern Montana. It coincides with the Bakken Formation, ground zero of the recent shale oil boom.
"The map also shows the trend of people leaving areas in the Northeast and Midwest — and of people moving to the Southeast."