Artisan Global
QuakeFeed Earthquake Map, Alerts and News
Amateur seismologists explore Earth's earthquakes in real time using a variety of map styles and parameter selections.
Pew Research Center
Pew Social and Demographic Trends: Migration Flows in the United States
The Pew Hispanic Research Center details the migration flows of the United States. Breaks down U.S. migration patterns from the last 20 years. Scroll mouse over map to see the regional migration throughout the years. View a map which...
Harvard University
Harvard Univ.: Immigration to Us, 1789 1930: California Gold Rush (1848 1858)
Describes the California Gold Rush and the impact it had on immigration to the United States and to the future demographics of California. Includes a high-resolution map of the gold region of California in 1851.