It has an editorial staff of one and annual advertising revenues of less than $2,000. It charges its subscribers nothing and pays most contributors the same. Mapping the settlement of Latino poultry workers is its idea of a sexy piece.But for a growing number of followers, it has become an important read.Every moment has its magazine, and for the age of migration it is the Migration Information Source, a weekly (more or less) online journal followed worldwide by scholars, policy makers and the occasional migrant in distress. Many readers discover the Source simply by googling the word “immigrant” and finding a link to migrationinformation.org among the millions of citations.At the site’s helm is an American-born editor, Kirin Kalia, 32, who describes herself as “half Dutch, half Indian, 100 percent American and total migration geek.” Kalia thrives on hybridity— devouring Indian-American novels and Dutch-Moroccan films — and finds no migration topic too obscure. To know the fate of Latvian mushroom pickers in Ireland is, for her, to glimpse the world in a grain of sand.“To move to a different country for whatever reason takes so much courage,” she said, interrupting an interview to play a song by a British-Indian rapper, Punjabi MC, stored on her hard drive. “The fact that so many people do it is just endlessly fascinating to me.”With conflicts rising over immigration to the United States, interest in the Source has surged. Readership has doubled in the past three years, Kalia said, to about 140,000 unique visits each month. If the Source has a unifying theme, it is that migration is a defining force nearly everywhere. There are about 200 million migrants in the world, probably a record, demographers say, in both relative and absolute terms, and more than 80 per cent live outside the United States. The Source has focused on Tajik construction workers in Russia, farmhands from Burkina Faso who pick Ghanaian crops and the Peruvians who take jobs left behind by Ecuadorean workers who have migrated to Spain.Other themes of the coverage include the speed with which migration has grown (Spain’s immigrant population has risen nearly sixfold in 10 years) and the conflict it brings, within both nations and living rooms. Political parties rise and fall. Economic interests win and lose. Family relations change. “None of this is easy,” Ms. Kalia said. Nor is the process of tracking it, with migration studies a nascent field and data on many countries scarce. But the magazine has won praise from a roster of A-list scholars who read it, write for it and assign it to their students.“It’s the best online source of information on migration that I have seen worldwide,” said Rubén G. Rumbaut, a sociologist at the University of California at Irvine and a leading authority on the children of immigrants to the United States. The magazine is published by a Washington research group, the Migration Policy Institute, that was started six years ago to help fill the knowledge gap.With a staff of 20, the institute reflects the mobility it studies. Some critics see a loose-borders tilt to the work. “They do some useful research,” said Mark Krikorian of the Center for Immigration Studies, a group that seeks lower immigration to the United States. “But their orientation is towards higher immigration and looser borders worldwide.”As for the difficulties that migration can bring, Kalia encountered them early when her uncle, who is Dutch and a Catholic priest, flew to California to baptize her baby brother. Her Hindu grandmother lived with the family, and locked herself in her bedroom, beside a Lord Krishna poster, until the uncle promised to desist.Kalia has yet to write about the episode, but she does see a lesson. “It shows you just how difficult negotiating cultural differences can be,” she said.