The United States is simply not the magnet it once was. Arrests at the United States’ southwest border in 2011 fell to their lowest level since 1972, confirming that illegal immigration, especially from Mexico, has reached what experts now describe as either a significant pause or the end of an era.

But this is not a shift in volume as much as direction. Nearly two million more Mexicans lived away from their hometowns in 2010 than was the case a decade earlier, according to the Mexican census. Experts say departures have also held steady or increased over the past few years in Guatemala, El Salvador, Peru and other Latin American countries that have traditionally been hubs of emigration.

The migrants are just not always going where they used to.

Mexicans, for example, are increasingly avoiding the United States and the border region, as well as their own capital, and are moving toward smaller, safer cities like Mérida, Oaxaca City and Querétaro. Experts say more Guatemalans are also settling in Mexico after years of passing through on the journey north.

To the south, the pull of Chile, Argentina and Brazil is also strengthening. The International Organization for Migration reports that the Bolivian population in Argentina has increased by 48 percent since 2001 (to 345,000), and that the country’s Paraguayan and Peruvian populations have grown even faster.

All of this movement is reshaping the region, making it less like a compass pointing north and more like a hub with many spokes. From the papayas grown by Bolivian farmers in Argentina to the recent discovery of exploited illegal workers in Chile and conflicts over local government in southern Mexico, this intraregional migration in Latin America has become both a challenge and a promising surprise for a part of the world that has generally framed the issue in terms of how many people leave for the United States.