In times, where the area in front of building D really has been a gravel covered place, we exercised there our every term seismic experiment with students attending the lecture "Applied Geophysics".

Nowadays, the gravel yard is gone, replaced by soft green hills. Nevertheless, the animation below is still the same. It has the intention to explain and visualise wave propagation in the underground in combination with measured signals.

In the upper part you can see the vertical component, measured at each geophone (blue dots). It runs from the right to the left side, similar to a coil of paper in a real-time writer with pens on the right side. The shown traces are slightly processed  (wiggle plot and agc) in order to make it easier to recognise first arrivals. Furthermore, the most important wave types are marked with coloured triangles (see below).

The lower part shows a simple near surface model of the campus in Lankwitz with a horizontal layer in a depth of 10 m and the waves propagating there. The most important wave types for this experiment are highlightened with colours.

• red - direct wave
• green - reflected wave
• yellow - head wave