How many people must jump together to simulate an earthquake? Can jumping people change the characteristics of soil response? Those questions have been taken seriously in the past: in 2001 a nationwide experiment (Giant Jump) was planned in the United Kingdom. One million schoolchildren took part in a simultaneous jump at a fixed time. Seismographic recordings (http://www.planetscience.com/text_only/about_sy/events/jump/index.html) showed that the motion was noticeable within the buildings (schools, museums) where the experiment took place but faded quickly, leaving no traces at permanent seismographic stations.
The project SESAME (Seismic Effects Assessment Using Ambient Excitations) WP02 (http://sesame-fp5.obs.ujf-grenoble.fr/) was designed...
