Isn't there a London carnival picture or something?
oh nice, deserves a mention:
Minami, Yoshinari. (2016). The Latest Study of Gravitational Wave Communication System. Journal of Earth Science and Engineering. 6. 164-176. 10.17265/2159-581X/2016.03.003. Gravitational wave is a strain wave of space and this can be also generated by strong magnetic field. The principle of gravitational wave generation using the fluctuation in strain field induced by magnetic field is introduced. Using both foregoing gravitational wave generator and gravitational wave detector (i.e. laser interferometric gravitational wave antenna), the gravitational communication system can be possible. This paper introduces its content presented at 20th Annual Lecture (1989) and the research trends in the latest gravitational wave.
https://www.researchgate.net/publication/303496922_The_Latest_Study_of_Gravitational_Wave_Communication_System
Gravity waves. RED doppler wave effect.