.. _03notes-03activeSource: ================================ Active Source Seismology ================================ The following are some teaching materials that I prepared for the AfricaArray REU project. Seismic reflection and refraction were taught in the class. I have given two-hour-long lectures and prepared related excises. ----- Reflection ============================== Wavefront and wave path are two representations of seismic waves. The following animations show the wavefront and a wave path of a one-layer-over-half-space model. The velocity model is designed to be a typical crust with a Vp of 6 km/s and a layer thickness of 35 km. You may click the following images to see animations. .. image:: ./images/reflectedWavefront044.png :target: http://eqseis.geosc.psu.edu/~cchai/_downloads/reflectedWavefront.mp4 :download:`Click to download the animation <./images/reflectedWavefront.mp4>` `YouTube version <09animations.html#wavefront-propagation-in-one-layer>`__ .. image:: ./images/reflectedWavefrontPath176.png :target: http://eqseis.geosc.psu.edu/~cchai/_downloads/reflectedWavefrontWavePath.mp4 :download:`Click to download the animation <./images/reflectedWavefrontWavePath.mp4>` `YouTube version <09animations.html#wavefront-and-ray-path-in-one-layer>`__ The following two animations are simulated experiments for direct waves and reflected waves. .. image:: ./images/directWaveSurvey0139.png :target: http://eqseis.geosc.psu.edu/~cchai/_downloads/directWaveSurvey.mp4 :download:`Click to download the animation <./images/directWaveSurvey.mp4>` `YouTube version <09animations.html#direct-wave-survey>`__ .. image:: ./images/reflectedSurvey0139.png :target: http://eqseis.geosc.psu.edu/~cchai/_downloads/reflectedSurvey.mp4 :download:`Click to download the animation <./images/reflectedSurvey.mp4>` `YouTube version <09animations.html#seismic-reflection-survey>`__