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Cyber TEAM Academy 2008 Earth Science Dr. Debi Kilb Scripps Institution of Oceanography Para ver esta película, debe disponer de QuickTime™ y de un descompresor TIFF (sin comprimir). What’s the difference between a “Seismograph” and a “Seismogram”? Seismograph: The instrument (Apparatus to measure and record vibrations) Seismogram: The actual wiggle (Record of an Earth tremor recorded by a seismograph) Para ver esta película, debe disponer de QuickTime™ y de un descompresor TIFF (sin comprimir). Seismic Waves fault ‘snaps’ energy ripples Para ver esta película, debe disponer de QuickTime™ y de un descompresor TIFF (sin comprimir). 3 Main Earthquake Waves • P waves (compressional) 6-8 km/s. Particle motion is parallel to direction of propagation; also called primary waves. • S waves (shear) 3-5 km/s. Particle motion is perpendicular to direction of propagation; also called secondary waves. Do not pass through liquids. • Surface waves (surface) < 3-4 km/s. Waves that travel around the Earth at the surface. Seismograph Para ver esta película, debe disponer de QuickTime™ y de un descompresor TIFF (sin comprimir). Types of Seismic Waves Seismograph Para ver esta película, debe disponer de QuickTime™ y de un descompresor TIFF (sin comprimir). Para ver esta película, debe disponer de QuickTime™ y de un descompresor TIFF (sin comprimir). Ground Motions P Waves S Waves Surface Waves Para ver esta película, debe disponer de QuickTime™ y de un descompresor TIFF (sin comprimir). epicenter of an earthquake Para ver esta película, debe disponer de QuickTime™ y de un descompresor TIFF (sin comprimir). http://projects.cs.csusm.edu/maps/quakesDemoMode.html