Chapter 3 - Key Issue 2: Where do people migrate within a country? Two main types of internal migrations are: interregional (between regions of a country) and intraregional (within a region) In past ? search for farmland; today ? interregional migration is from rural areas to urban areas for jobs Recent immigrants - more than ? immigrate to California, Florida, New York, or Texas Interregional Migration in the United States Population Center ? the average location of everyone in the country, the ?center of population gravity? The changing location of the population center graphically demonstrated the march of American people across the North American continent over the past 200 years; the center consistently shifted westward