GeologyRocks

Up to date GPS measurements of plate movement from around the world. Displayed on a world map or as graphs for individual stations

This site lots of information on Northern Californian earthquakes (the San Andreas Fault). You can also see recent events (with size and depth details) on a map for up to a week. There's also information on hazard preperation and earthqauke research.

The centre is the country’s focus for oceanography and represents an unparalleled investment in marine and earth sciences and technology in the UK. There are detials on the research done at the centre, including the recent "missing crust" story: http://www.noc.soton.ac.uk/nocs/news.php?action=display_news&idx=349

If there's place to get palaeogeographical maps then this is it! There are separate maps for each time period in geologic history, plus some data on past climate. Well worth a visit.

A brilliant strategy game based on finding oil using money left by a deceased Aunt. Uses a Java applet and comes linked with pages to do some reading before you start. From the American Geological Institute.

Some excellent Java applets that let you locate an earthquake using seismograph readings. The site may take some time to load but it is worth it.

An excellent introduction to earthquakes for kids.

The USGS earthquake hazards program, includes "Today's Earthquake fact"

All about impact craters on Earth.

An excellent introduction to the Earth's magnetosphere.