This site explains the many Internet tools that are currently available for accessing earthquake data. Students discover that by using these tools one can obtain information (such as location, origin time and magnitude) about the most recent earthquakes; search historical earthquake catalogs for earthquakes in a given region over a selected time period; and view, download or make maps of recent or historical earthquake activity of the world or of a selected region. They also learn that the tools support education and research activities related to earthquakes such as: maintaining a classroom map of significant earthquakes; calculating earthquake magnitude from educational seismograph records and comparing with official magnitude estimates; obtaining historical earthquake data for a specific area to relate a recent event to the background seismicity; and analyzing sequences of earthquake activity. There is a link to information about obtaining and using seismograms.