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.
US Geological Survey
Usgs: Monterey Submarine Canyon, California Moored Array Data Report [Pdf]
This advanced site discusses some of the research done and research techniques used in studies of the Monterey Canyon. Great graphics showing the position of the canyon relative to other features of the continental margin. Also...
US Geological Survey
Usgs: Developing the Theory
This comprehensive overview of continental drift takes a historical look at the various types of evidence which led to the development of the theory.