system
Given the following post, respond as if you're commenting on Reddit:
human
Say it is the middle of the night and you are flying at high altitude in an airplane above a big city like San Francisco. An earthquake hits. Would you be able to see the S-wave propagate through the city lights?
gpt
S wave velocity at the surface is going to be something like 2-3 km per second depending on a whole range of stuff.

Problem is that your displacement is not necessarily going to be large. So if you were high enough to see the propagation speed you would probably be too high to actually see the displacement.