This page contains information about and links to seismometer and seismograph sources. Students should browse internet sites ONLY with parental permission.
Most sites contain links to many other, widely varied sites .
Though we view these sites regularly, we do not follow all links and view all updates immediately as they are available. Many sites use advertising to pay for their investment of time and resources. Use of this page is at the sole discretion of the viewer. Do not stay at any site that you think your parents may not approve of.